ALSA: ctxfi - Remove useless initializations and cast

Remove useless variable initializations and cast at the beginning of
functions.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

11 files changed, 301 insertions, 297 deletions

diff --git a/sound/pci/ctxfi/ctamixer.c b/sound/pci/ctxfi/ctamixer.c
index 859e996ad728..a1db51b3ead8 100644
--- a/sound/pci/ctxfi/ctamixer.c
+++ b/sound/pci/ctxfi/ctamixer.c
@@ -58,9 +58,9 @@ static struct rsc_ops amixer_basic_rsc_ops = {
 
 static int amixer_set_input(struct amixer *amixer, struct rsc *rsc)
 {
-        struct hw *hw = NULL;
+        struct hw *hw;
 
-        hw = (struct hw *)amixer->rsc.hw;
+        hw = amixer->rsc.hw;
         hw->amixer_set_mode(amixer->rsc.ctrl_blk, AMIXER_Y_IMMEDIATE);
         amixer->input = rsc;
         if (NULL == rsc)
@@ -75,9 +75,9 @@ static int amixer_set_input(struct amixer *amixer, struct rsc *rsc)
 /* y is a 14-bit immediate constant */
 static int amixer_set_y(struct amixer *amixer, unsigned int y)
 {
-        struct hw *hw = NULL;
+        struct hw *hw;
 
-        hw = (struct hw *)amixer->rsc.hw;
+        hw = amixer->rsc.hw;
         hw->amixer_set_y(amixer->rsc.ctrl_blk, y);
 
         return 0;
@@ -85,9 +85,9 @@ static int amixer_set_y(struct amixer *amixer, unsigned int y)
 
 static int amixer_set_invalid_squash(struct amixer *amixer, unsigned int iv)
 {
-        struct hw *hw = NULL;
+        struct hw *hw;
 
-        hw = (struct hw *)amixer->rsc.hw;
+        hw = amixer->rsc.hw;
         hw->amixer_set_iv(amixer->rsc.ctrl_blk, iv);
 
         return 0;
@@ -95,9 +95,9 @@ static int amixer_set_invalid_squash(struct amixer *amixer, unsigned int iv)
 
 static int amixer_set_sum(struct amixer *amixer, struct sum *sum)
 {
-        struct hw *hw = NULL;
+        struct hw *hw;
 
-        hw = (struct hw *)amixer->rsc.hw;
+        hw = amixer->rsc.hw;
         amixer->sum = sum;
         if (NULL == sum) {
                 hw->amixer_set_se(amixer->rsc.ctrl_blk, 0);
@@ -112,13 +112,13 @@ static int amixer_set_sum(struct amixer *amixer, struct sum *sum)
 
 static int amixer_commit_write(struct amixer *amixer)
 {
-        struct hw *hw = NULL;
-        unsigned int index = 0;
-        int i = 0;
-        struct rsc *input = NULL;
-        struct sum *sum = NULL;
+        struct hw *hw;
+        unsigned int index;
+        int i;
+        struct rsc *input;
+        struct sum *sum;
 
-        hw = (struct hw *)amixer->rsc.hw;
+        hw = amixer->rsc.hw;
         input = amixer->input;
         sum = amixer->sum;
 
@@ -158,10 +158,10 @@ static int amixer_commit_write(struct amixer *amixer)
 
 static int amixer_commit_raw_write(struct amixer *amixer)
 {
-        struct hw *hw = NULL;
-        unsigned int index = 0;
+        struct hw *hw;
+        unsigned int index;
 
-        hw = (struct hw *)amixer->rsc.hw;
+        hw = amixer->rsc.hw;
         index = amixer->rsc.ops->output_slot(&amixer->rsc);
         hw->amixer_commit_write(hw, index, amixer->rsc.ctrl_blk);
 
@@ -170,9 +170,9 @@ static int amixer_commit_raw_write(struct amixer *amixer)
 
 static int amixer_get_y(struct amixer *amixer)
 {
-        struct hw *hw = NULL;
+        struct hw *hw;
 
-        hw = (struct hw *)amixer->rsc.hw;
+        hw = amixer->rsc.hw;
         return hw->amixer_get_y(amixer->rsc.ctrl_blk);
 }
 
@@ -201,7 +201,7 @@ static int amixer_rsc_init(struct amixer *amixer,
                            const struct amixer_desc *desc,
                            struct amixer_mgr *mgr)
 {
-        int err = 0;
+        int err;
 
         err = rsc_init(&amixer->rsc, amixer->idx[0],
                         AMIXER, desc->msr, mgr->mgr.hw);
@@ -233,9 +233,9 @@ static int get_amixer_rsc(struct amixer_mgr *mgr,
                           const struct amixer_desc *desc,
                           struct amixer **ramixer)
 {
-        int err = 0, i = 0;
-        unsigned int idx = 0;
-        struct amixer *amixer = NULL;
+        int err, i;
+        unsigned int idx;
+        struct amixer *amixer;
         unsigned long flags;
 
         *ramixer = NULL;
@@ -284,7 +284,7 @@ error:
 static int put_amixer_rsc(struct amixer_mgr *mgr, struct amixer *amixer)
 {
         unsigned long flags;
-        int i = 0;
+        int i;
 
         spin_lock_irqsave(&mgr->mgr_lock, flags);
         for (i = 0; i < amixer->rsc.msr; i++)
@@ -299,7 +299,7 @@ static int put_amixer_rsc(struct amixer_mgr *mgr, struct amixer *amixer)
 
 int amixer_mgr_create(void *hw, struct amixer_mgr **ramixer_mgr)
 {
-        int err = 0;
+        int err;
         struct amixer_mgr *amixer_mgr;
 
         *ramixer_mgr = NULL;
@@ -367,7 +367,7 @@ static int sum_rsc_init(struct sum *sum,
                         const struct sum_desc *desc,
                         struct sum_mgr *mgr)
 {
-        int err = 0;
+        int err;
 
         err = rsc_init(&sum->rsc, sum->idx[0], SUM, desc->msr, mgr->mgr.hw);
         if (err)
@@ -388,9 +388,9 @@ static int get_sum_rsc(struct sum_mgr *mgr,
                        const struct sum_desc *desc,
                        struct sum **rsum)
 {
-        int err = 0, i = 0;
-        unsigned int idx = 0;
-        struct sum *sum = NULL;
+        int err, i;
+        unsigned int idx;
+        struct sum *sum;
         unsigned long flags;
 
         *rsum = NULL;
@@ -438,7 +438,7 @@ error:
 static int put_sum_rsc(struct sum_mgr *mgr, struct sum *sum)
 {
         unsigned long flags;
-        int i = 0;
+        int i;
 
         spin_lock_irqsave(&mgr->mgr_lock, flags);
         for (i = 0; i < sum->rsc.msr; i++)
@@ -453,7 +453,7 @@ static int put_sum_rsc(struct sum_mgr *mgr, struct sum *sum)
 
 int sum_mgr_create(void *hw, struct sum_mgr **rsum_mgr)
 {
-        int err = 0;
+        int err;
         struct sum_mgr *sum_mgr;
 
         *rsum_mgr = NULL;
diff --git a/sound/pci/ctxfi/ctatc.c b/sound/pci/ctxfi/ctatc.c
index 9b1324544db0..7898a375df0e 100644
--- a/sound/pci/ctxfi/ctatc.c
+++ b/sound/pci/ctxfi/ctatc.c
@@ -190,8 +190,8 @@ static unsigned int convert_format(snd_pcm_format_t snd_format)
 static unsigned int
 atc_get_pitch(unsigned int input_rate, unsigned int output_rate)
 {
-        unsigned int pitch = 0;
-        int b = 0;
+        unsigned int pitch;
+        int b;
 
         /* get pitch and convert to fixed-point 8.24 format. */
         pitch = (input_rate / output_rate) << 24;
@@ -241,12 +241,12 @@ static int atc_pcm_playback_prepare(struct ct_atc *atc, struct ct_atc_pcm *apcm)
         struct amixer_mgr *amixer_mgr = atc->rsc_mgrs[AMIXER];
         struct src_desc desc = {0};
         struct amixer_desc mix_dsc = {0};
-        struct src *src = NULL;
-        struct amixer *amixer = NULL;
-        int err = 0;
+        struct src *src;
+        struct amixer *amixer;
+        int err;
         int n_amixer = apcm->substream->runtime->channels, i = 0;
         int device = apcm->substream->pcm->device;
-        unsigned int pitch = 0;
+        unsigned int pitch;
         unsigned long flags;
 
         if (NULL != apcm->src) {
@@ -324,8 +324,8 @@ atc_pcm_release_resources(struct ct_atc *atc, struct ct_atc_pcm *apcm)
         struct srcimp_mgr *srcimp_mgr = atc->rsc_mgrs[SRCIMP];
         struct amixer_mgr *amixer_mgr = atc->rsc_mgrs[AMIXER];
         struct sum_mgr *sum_mgr = atc->rsc_mgrs[SUM];
-        struct srcimp *srcimp = NULL;
-        int i = 0;
+        struct srcimp *srcimp;
+        int i;
 
         if (NULL != apcm->srcimps) {
                 for (i = 0; i < apcm->n_srcimp; i++) {
@@ -377,7 +377,7 @@ atc_pcm_release_resources(struct ct_atc *atc, struct ct_atc_pcm *apcm)
 
 static int atc_pcm_playback_start(struct ct_atc *atc, struct ct_atc_pcm *apcm)
 {
-        unsigned int max_cisz = 0;
+        unsigned int max_cisz;
         struct src *src = apcm->src;
 
         max_cisz = src->multi * src->rsc.msr;
@@ -398,8 +398,8 @@ static int atc_pcm_playback_start(struct ct_atc *atc, struct ct_atc_pcm *apcm)
 
 static int atc_pcm_stop(struct ct_atc *atc, struct ct_atc_pcm *apcm)
 {
-        struct src *src = NULL;
-        int i = 0;
+        struct src *src;
+        int i;
 
         ct_timer_stop(apcm->timer);
 
@@ -426,8 +426,8 @@ static int
 atc_pcm_playback_position(struct ct_atc *atc, struct ct_atc_pcm *apcm)
 {
         struct src *src = apcm->src;
-        u32 size = 0, max_cisz = 0;
-        int position = 0;
+        u32 size, max_cisz;
+        int position;
 
         position = src->ops->get_ca(src);
 
@@ -449,7 +449,7 @@ struct src_node_conf_t {
 static void setup_src_node_conf(struct ct_atc *atc, struct ct_atc_pcm *apcm,
                                 struct src_node_conf_t *conf, int *n_srcc)
 {
-        unsigned int pitch = 0;
+        unsigned int pitch;
 
         /* get pitch and convert to fixed-point 8.24 format. */
         pitch = atc_get_pitch((atc->rsr * atc->msr),
@@ -494,14 +494,14 @@ atc_pcm_capture_get_resources(struct ct_atc *atc, struct ct_atc_pcm *apcm)
         struct amixer_mgr *amixer_mgr = atc->rsc_mgrs[AMIXER];
         struct sum_mgr *sum_mgr = atc->rsc_mgrs[SUM];
         struct src_desc src_dsc = {0};
-        struct src *src = NULL;
+        struct src *src;
         struct srcimp_desc srcimp_dsc = {0};
-        struct srcimp *srcimp = NULL;
+        struct srcimp *srcimp;
         struct amixer_desc mix_dsc = {0};
         struct sum_desc sum_dsc = {0};
-        unsigned int pitch = 0;
-        int multi = 0, err = 0, i = 0;
-        int n_srcimp = 0, n_amixer = 0, n_srcc = 0, n_sum = 0;
+        unsigned int pitch;
+        int multi, err, i;
+        int n_srcimp, n_amixer, n_srcc, n_sum;
         struct src_node_conf_t src_node_conf[2] = {{0} };
 
         /* first release old resources */
@@ -518,8 +518,8 @@ atc_pcm_capture_get_resources(struct ct_atc *atc, struct ct_atc_pcm *apcm)
 
         setup_src_node_conf(atc, apcm, src_node_conf, &n_srcc);
         n_sum = (1 == multi) ? 1 : 0;
-        n_amixer += n_sum * 2 + n_srcc;
-        n_srcimp += n_srcc;
+        n_amixer = n_sum * 2 + n_srcc;
+        n_srcimp = n_srcc;
         if ((multi > 1) && (0x8000000 >= pitch)) {
                 /* Need extra AMIXERs and SRCIMPs for special treatment
                  * of interleaved recording of conjugate channels */
@@ -633,14 +633,14 @@ error1:
 
 static int atc_pcm_capture_prepare(struct ct_atc *atc, struct ct_atc_pcm *apcm)
 {
-        struct src *src = NULL;
-        struct amixer *amixer = NULL;
-        struct srcimp *srcimp = NULL;
+        struct src *src;
+        struct amixer *amixer;
+        struct srcimp *srcimp;
         struct ct_mixer *mixer = atc->mixer;
-        struct sum *mono = NULL;
+        struct sum *mono;
         struct rsc *out_ports[8] = {NULL};
-        int err = 0, i = 0, j = 0, n_sum = 0, multi = 0;
-        unsigned int pitch = 0;
+        int err, i, j, n_sum, multi;
+        unsigned int pitch;
         int mix_base = 0, imp_base = 0;
 
         if (NULL != apcm->src) {
@@ -714,9 +714,9 @@ static int atc_pcm_capture_prepare(struct ct_atc *atc, struct ct_atc_pcm *apcm)
 
 static int atc_pcm_capture_start(struct ct_atc *atc, struct ct_atc_pcm *apcm)
 {
-        struct src *src = NULL;
+        struct src *src;
         struct src_mgr *src_mgr = atc->rsc_mgrs[SRC];
-        int i = 0, multi = 0;
+        int i, multi;
 
         if (apcm->started)
                 return 0;
@@ -776,10 +776,10 @@ static int spdif_passthru_playback_get_resources(struct ct_atc *atc,
         struct amixer_mgr *amixer_mgr = atc->rsc_mgrs[AMIXER];
         struct src_desc desc = {0};
         struct amixer_desc mix_dsc = {0};
-        struct src *src = NULL;
-        int err = 0;
-        int n_amixer = apcm->substream->runtime->channels, i = 0;
-        unsigned int pitch = 0, rsr = atc->pll_rate;
+        struct src *src;
+        int err;
+        int n_amixer = apcm->substream->runtime->channels, i;
+        unsigned int pitch, rsr = atc->pll_rate;
 
         /* first release old resources */
         atc->pcm_release_resources(atc, apcm);
@@ -832,15 +832,24 @@ error1:
         return err;
 }
 
+static int atc_pll_init(struct ct_atc *atc, int rate)
+{
+        struct hw *hw = atc->hw;
+        int err;
+        err = hw->pll_init(hw, rate);
+        atc->pll_rate = err ? 0 : rate;
+        return err;
+}
+
 static int
 spdif_passthru_playback_setup(struct ct_atc *atc, struct ct_atc_pcm *apcm)
 {
         struct dao *dao = container_of(atc->daios[SPDIFOO], struct dao, daio);
         unsigned long flags;
         unsigned int rate = apcm->substream->runtime->rate;
-        unsigned int status = 0;
-        int err = 0;
-        unsigned char iec958_con_fs = 0;
+        unsigned int status;
+        int err;
+        unsigned char iec958_con_fs;
 
         switch (rate) {
         case 48000:
@@ -864,10 +873,8 @@ spdif_passthru_playback_setup(struct ct_atc *atc, struct ct_atc_pcm *apcm)
                 dao->ops->set_spos(dao, status);
                 dao->ops->commit_write(dao);
         }
-        if ((rate != atc->pll_rate) && (32000 != rate)) {
-                err = ((struct hw *)atc->hw)->pll_init(atc->hw, rate);
-                atc->pll_rate = err ? 0 : rate;
-        }
+        if ((rate != atc->pll_rate) && (32000 != rate))
+                err = atc_pll_init(atc, rate);
         spin_unlock_irqrestore(&atc->atc_lock, flags);
 
         return err;
@@ -876,11 +883,11 @@ spdif_passthru_playback_setup(struct ct_atc *atc, struct ct_atc_pcm *apcm)
 static int
 spdif_passthru_playback_prepare(struct ct_atc *atc, struct ct_atc_pcm *apcm)
 {
-        struct src *src = NULL;
-        struct amixer *amixer = NULL;
-        struct dao *dao = NULL;
-        int err = 0;
-        int i = 0;
+        struct src *src;
+        struct amixer *amixer;
+        struct dao *dao;
+        int err;
+        int i;
         unsigned long flags;
 
         if (NULL != apcm->src)
@@ -924,7 +931,7 @@ static int atc_select_line_in(struct ct_atc *atc)
 {
         struct hw *hw = atc->hw;
         struct ct_mixer *mixer = atc->mixer;
-        struct src *src = NULL;
+        struct src *src;
 
         if (hw->is_adc_source_selected(hw, ADC_LINEIN))
                 return 0;
@@ -946,7 +953,7 @@ static int atc_select_mic_in(struct ct_atc *atc)
 {
         struct hw *hw = atc->hw;
         struct ct_mixer *mixer = atc->mixer;
-        struct src *src = NULL;
+        struct src *src;
 
         if (hw->is_adc_source_selected(hw, ADC_MICIN))
                 return 0;
@@ -1063,8 +1070,8 @@ static int atc_spdif_out_passthru(struct ct_atc *atc, unsigned char state)
 {
         unsigned long flags;
         struct dao_desc da_dsc = {0};
-        struct dao *dao = NULL;
-        int err = 0;
+        struct dao *dao;
+        int err;
         struct ct_mixer *mixer = atc->mixer;
         struct rsc *rscs[2] = {NULL};
         unsigned int spos = 0;
@@ -1082,11 +1089,8 @@ static int atc_spdif_out_passthru(struct ct_atc *atc, unsigned char state)
                 dao->ops->set_left_input(dao, rscs[0]);
                 dao->ops->set_right_input(dao, rscs[1]);
                 /* Restore PLL to atc->rsr if needed. */
-                if (atc->pll_rate != atc->rsr) {
-                        err = ((struct hw *)atc->hw)->pll_init(atc->hw,
-                                                               atc->rsr);
-                        atc->pll_rate = err ? 0 : atc->rsr;
-                }
+                if (atc->pll_rate != atc->rsr)
+                        err = atc_pll_init(atc, atc->rsr);
         }
         dao->ops->set_spos(dao, spos);
         dao->ops->commit_write(dao);
@@ -1097,15 +1101,15 @@ static int atc_spdif_out_passthru(struct ct_atc *atc, unsigned char state)
 
 static int ct_atc_destroy(struct ct_atc *atc)
 {
-        struct daio_mgr *daio_mgr = NULL;
-        struct dao *dao = NULL;
-        struct dai *dai = NULL;
-        struct daio *daio = NULL;
-        struct sum_mgr *sum_mgr = NULL;
-        struct src_mgr *src_mgr = NULL;
-        struct srcimp_mgr *srcimp_mgr = NULL;
-        struct srcimp *srcimp = NULL;
-        struct ct_mixer *mixer = NULL;
+        struct daio_mgr *daio_mgr;
+        struct dao *dao;
+        struct dai *dai;
+        struct daio *daio;
+        struct sum_mgr *sum_mgr;
+        struct src_mgr *src_mgr;
+        struct srcimp_mgr *srcimp_mgr;
+        struct srcimp *srcimp;
+        struct ct_mixer *mixer;
         int i = 0;
 
         if (NULL == atc)
@@ -1279,9 +1283,9 @@ int __devinit ct_atc_create_alsa_devs(struct ct_atc *atc)
 
 static int __devinit atc_create_hw_devs(struct ct_atc *atc)
 {
-        struct hw *hw = NULL;
+        struct hw *hw;
         struct card_conf info = {0};
-        int i = 0, err = 0;
+        int i, err;
 
         err = create_hw_obj(atc->pci, &hw);
         if (err) {
@@ -1316,14 +1320,14 @@ static int __devinit atc_create_hw_devs(struct ct_atc *atc)
 static int __devinit atc_get_resources(struct ct_atc *atc)
 {
         struct daio_desc da_desc = {0};
-        struct daio_mgr *daio_mgr = NULL;
+        struct daio_mgr *daio_mgr;
         struct src_desc src_dsc = {0};
-        struct src_mgr *src_mgr = NULL;
+        struct src_mgr *src_mgr;
         struct srcimp_desc srcimp_dsc = {0};
-        struct srcimp_mgr *srcimp_mgr = NULL;
+        struct srcimp_mgr *srcimp_mgr;
         struct sum_desc sum_dsc = {0};
-        struct sum_mgr *sum_mgr = NULL;
-        int err = 0, i = 0;
+        struct sum_mgr *sum_mgr;
+        int err, i;
         unsigned short subsys_id;
 
         atc->daios = kzalloc(sizeof(void *)*(DAIONUM), GFP_KERNEL);
@@ -1428,8 +1432,8 @@ atc_connect_dai(struct src_mgr *src_mgr, struct dai *dai,
                 struct src **srcs, struct srcimp **srcimps)
 {
         struct rsc *rscs[2] = {NULL};
-        struct src *src = NULL;
-        struct srcimp *srcimp = NULL;
+        struct src *src;
+        struct srcimp *srcimp;
         int i = 0;
 
         rscs[0] = &dai->daio.rscl;
@@ -1464,13 +1468,13 @@ atc_connect_dai(struct src_mgr *src_mgr, struct dai *dai,
 
 static void __devinit atc_connect_resources(struct ct_atc *atc)
 {
-        struct dai *dai = NULL;
-        struct dao *dao = NULL;
-        struct src *src = NULL;
-        struct sum *sum = NULL;
-        struct ct_mixer *mixer = NULL;
+        struct dai *dai;
+        struct dao *dao;
+        struct src *src;
+        struct sum *sum;
+        struct ct_mixer *mixer;
         struct rsc *rscs[2] = {NULL};
-        int i = 0, j = 0;
+        int i, j;
 
         mixer = atc->mixer;
 
@@ -1553,11 +1557,11 @@ static struct ct_atc atc_preset __devinitdata = {
 int __devinit ct_atc_create(struct snd_card *card, struct pci_dev *pci,
                   unsigned int rsr, unsigned int msr, struct ct_atc **ratc)
 {
-        struct ct_atc *atc = NULL;
+        struct ct_atc *atc;
         static struct snd_device_ops ops = {
                 .dev_free = atc_dev_free,
         };
-        int err = 0;
+        int err;
 
         *ratc = NULL;
 
diff --git a/sound/pci/ctxfi/ctdaio.c b/sound/pci/ctxfi/ctdaio.c
index a2aea399eba1..befead4eeaab 100644
--- a/sound/pci/ctxfi/ctdaio.c
+++ b/sound/pci/ctxfi/ctdaio.c
@@ -168,9 +168,9 @@ static int dao_commit_write(struct dao *dao)
 
 static int dao_set_left_input(struct dao *dao, struct rsc *input)
 {
-        struct imapper *entry = NULL;
+        struct imapper *entry;
         struct daio *daio = &dao->daio;
-        int i = 0;
+        int i;
 
         entry = kzalloc((sizeof(*entry) * daio->rscl.msr), GFP_KERNEL);
         if (NULL == entry)
@@ -196,9 +196,9 @@ static int dao_set_left_input(struct dao *dao, struct rsc *input)
 
 static int dao_set_right_input(struct dao *dao, struct rsc *input)
 {
-        struct imapper *entry = NULL;
+        struct imapper *entry;
         struct daio *daio = &dao->daio;
-        int i = 0;
+        int i;
 
         entry = kzalloc((sizeof(*entry) * daio->rscr.msr), GFP_KERNEL);
         if (NULL == entry)
@@ -224,9 +224,9 @@ static int dao_set_right_input(struct dao *dao, struct rsc *input)
 
 static int dao_clear_left_input(struct dao *dao)
 {
-        struct imapper *entry = NULL;
+        struct imapper *entry;
         struct daio *daio = &dao->daio;
-        int i = 0;
+        int i;
 
         if (NULL == dao->imappers[0])
                 return 0;
@@ -248,9 +248,9 @@ static int dao_clear_left_input(struct dao *dao)
 
 static int dao_clear_right_input(struct dao *dao)
 {
-        struct imapper *entry = NULL;
+        struct imapper *entry;
         struct daio *daio = &dao->daio;
-        int i = 0;
+        int i;
 
         if (NULL == dao->imappers[daio->rscl.msr])
                 return 0;
@@ -299,7 +299,7 @@ static int dai_set_srt_srcr(struct dai *dai, struct rsc *src)
 
 static int dai_set_srt_msr(struct dai *dai, unsigned int msr)
 {
-        unsigned int rsr = 0;
+        unsigned int rsr;
 
         for (rsr = 0; msr > 1; msr >>= 1)
                 rsr++;
@@ -340,8 +340,8 @@ static int daio_rsc_init(struct daio *daio,
                          const struct daio_desc *desc,
                          void *hw)
 {
-        int err = 0;
-        unsigned int idx_l = 0, idx_r = 0;
+        int err;
+        unsigned int idx_l, idx_r;
 
         switch (((struct hw *)hw)->get_chip_type(hw)) {
         case ATC20K1:
@@ -400,8 +400,8 @@ static int dao_rsc_init(struct dao *dao,
                         struct daio_mgr *mgr)
 {
         struct hw *hw = mgr->mgr.hw;
-        unsigned int conf = 0;
-        int err = 0;
+        unsigned int conf;
+        int err;
 
         err = daio_rsc_init(&dao->daio, desc, mgr->mgr.hw);
         if (err)
@@ -423,7 +423,7 @@ static int dao_rsc_init(struct dao *dao,
                         daio_device_index(dao->daio.type, hw));
         hw->daio_mgr_commit_write(hw, mgr->mgr.ctrl_blk);
 
-        conf |= (desc->msr & 0x7) | (desc->passthru << 3);
+        conf = (desc->msr & 0x7) | (desc->passthru << 3);
         hw->daio_mgr_dao_init(mgr->mgr.ctrl_blk,
                         daio_device_index(dao->daio.type, hw), conf);
         hw->daio_mgr_enb_dao(mgr->mgr.ctrl_blk,
@@ -475,9 +475,9 @@ static int dai_rsc_init(struct dai *dai,
                         const struct daio_desc *desc,
                         struct daio_mgr *mgr)
 {
-        int err = 0;
+        int err;
         struct hw *hw = mgr->mgr.hw;
-        unsigned int rsr = 0, msr = 0;
+        unsigned int rsr, msr;
 
         err = daio_rsc_init(&dai->daio, desc, mgr->mgr.hw);
         if (err)
@@ -536,7 +536,7 @@ static int get_daio_rsc(struct daio_mgr *mgr,
                         const struct daio_desc *desc,
                         struct daio **rdaio)
 {
-        int err = 0;
+        int err;
         struct dai *dai = NULL;
         struct dao *dao = NULL;
         unsigned long flags;
@@ -660,7 +660,7 @@ static int daio_map_op(void *data, struct imapper *entry)
 static int daio_imap_add(struct daio_mgr *mgr, struct imapper *entry)
 {
         unsigned long flags;
-        int err = 0;
+        int err;
 
         spin_lock_irqsave(&mgr->imap_lock, flags);
         if ((0 == entry->addr) && (mgr->init_imap_added)) {
@@ -677,7 +677,7 @@ static int daio_imap_add(struct daio_mgr *mgr, struct imapper *entry)
 static int daio_imap_delete(struct daio_mgr *mgr, struct imapper *entry)
 {
         unsigned long flags;
-        int err = 0;
+        int err;
 
         spin_lock_irqsave(&mgr->imap_lock, flags);
         err = input_mapper_delete(&mgr->imappers, entry, daio_map_op, mgr);
@@ -701,7 +701,7 @@ static int daio_mgr_commit_write(struct daio_mgr *mgr)
 
 int daio_mgr_create(void *hw, struct daio_mgr **rdaio_mgr)
 {
-        int err = 0, i = 0;
+        int err, i;
         struct daio_mgr *daio_mgr;
         struct imapper *entry;
 
diff --git a/sound/pci/ctxfi/cthardware.c b/sound/pci/ctxfi/cthardware.c
index 53d1acadc0e8..5ec6813d3911 100644
--- a/sound/pci/ctxfi/cthardware.c
+++ b/sound/pci/ctxfi/cthardware.c
@@ -22,7 +22,7 @@
 
 static enum CHIPTYP __devinitdata get_chip_type(struct hw *hw)
 {
-        enum CHIPTYP type = ATCNONE;
+        enum CHIPTYP type;
 
         switch (hw->pci->device) {
         case 0x0005:    /* 20k1 device */
@@ -41,7 +41,7 @@ static enum CHIPTYP __devinitdata get_chip_type(struct hw *hw)
 
 int __devinit create_hw_obj(struct pci_dev *pci, struct hw **rhw)
 {
-        int err = 0;
+        int err;
 
         switch (pci->device) {
         case 0x0005:    /* 20k1 device */
@@ -65,7 +65,7 @@ int __devinit create_hw_obj(struct pci_dev *pci, struct hw **rhw)
 
 int destroy_hw_obj(struct hw *hw)
 {
-        int err = 0;
+        int err;
 
         switch (hw->pci->device) {
         case 0x0005:    /* 20k1 device */
diff --git a/sound/pci/ctxfi/cthw20k1.c b/sound/pci/ctxfi/cthw20k1.c
index b165466e1a54..38b87b6ee6d4 100644
--- a/sound/pci/ctxfi/cthw20k1.c
+++ b/sound/pci/ctxfi/cthw20k1.c
@@ -369,7 +369,7 @@ static unsigned int src_param_pitch_mixer(unsigned int src_idx)
 static int src_commit_write(struct hw *hw, unsigned int idx, void *blk)
 {
         struct src_rsc_ctrl_blk *ctl = blk;
-        int i = 0;
+        int i;
 
         if (ctl->dirty.bf.czbfs) {
                 /* Clear Z-Buffer registers */
@@ -468,8 +468,8 @@ static int src_mgr_dsb_src(void *blk, unsigned int idx)
 static int src_mgr_commit_write(struct hw *hw, void *blk)
 {
         struct src_mgr_ctrl_blk *ctl = blk;
-        int i = 0;
-        unsigned int ret = 0;
+        int i;
+        unsigned int ret;
 
         if (ctl->dirty.bf.enbsa) {
                 do {
@@ -1108,7 +1108,7 @@ static int daio_mgr_set_imapaddr(void *blk, unsigned int addr)
 static int daio_mgr_commit_write(struct hw *hw, void *blk)
 {
         struct daio_mgr_ctrl_blk *ctl = blk;
-        int i = 0;
+        int i;
 
         if (ctl->dirty.bf.i2sictl || ctl->dirty.bf.i2soctl) {
                 for (i = 0; i < 4; i++) {
@@ -1212,8 +1212,8 @@ struct trn_conf {
 
 static int hw_daio_init(struct hw *hw, const struct daio_conf *info)
 {
-        u32 i2sorg = 0;
-        u32 spdorg = 0;
+        u32 i2sorg;
+        u32 spdorg;
 
         /* Read I2S CTL.  Keep original value. */
         /*i2sorg = hw_read_20kx(hw, I2SCTL);*/
@@ -1263,8 +1263,8 @@ static int hw_daio_init(struct hw *hw, const struct daio_conf *info)
 /* TRANSPORT operations */
 static int hw_trn_init(struct hw *hw, const struct trn_conf *info)
 {
-        u32 trnctl = 0;
-        unsigned long ptp_phys_low = 0, ptp_phys_high = 0;
+        u32 trnctl;
+        u32 ptp_phys_low, ptp_phys_high;
 
         /* Set up device page table */
         if ((~0UL) == info->vm_pgt_phys) {
@@ -1316,7 +1316,7 @@ static int hw_trn_init(struct hw *hw, const struct trn_conf *info)
 static int hw_pll_init(struct hw *hw, unsigned int rsr)
 {
         unsigned int pllctl;
-        int i = 0;
+        int i;
 
         pllctl = (48000 == rsr) ? 0x1480a001 : 0x1480a731;
         for (i = 0; i < 3; i++) {
@@ -1384,7 +1384,7 @@ static void i2c_lock(struct hw *hw)
 
 static void i2c_write(struct hw *hw, u32 device, u32 addr, u32 data)
 {
-        unsigned int ret = 0;
+        unsigned int ret;
 
         do {
                 ret = hw_read_pci(hw, 0xEC);
@@ -1397,9 +1397,9 @@ static void i2c_write(struct hw *hw, u32 device, u32 addr, u32 data)
 
 static int hw_reset_dac(struct hw *hw)
 {
-        u32 i = 0;
-        u16 gpioorg = 0;
-        unsigned int ret = 0;
+        u32 i;
+        u16 gpioorg;
+        unsigned int ret;
 
         if (i2c_unlock(hw))
                 return -1;
@@ -1430,10 +1430,10 @@ static int hw_reset_dac(struct hw *hw)
 
 static int hw_dac_init(struct hw *hw, const struct dac_conf *info)
 {
-        u32 data = 0;
-        u16 gpioorg = 0;
-        u16 subsys_id = 0;
-        unsigned int ret = 0;
+        u32 data;
+        u16 gpioorg;
+        u16 subsys_id;
+        unsigned int ret;
 
         pci_read_config_word(hw->pci, PCI_SUBSYSTEM_ID, &subsys_id);
         if ((subsys_id == 0x0022) || (subsys_id == 0x002F)) {
@@ -1494,13 +1494,12 @@ static int hw_dac_init(struct hw *hw, const struct dac_conf *info)
 
 static int is_adc_input_selected_SB055x(struct hw *hw, enum ADCSRC type)
 {
-        u32 data = 0;
-        return data;
+        return 0;
 }
 
 static int is_adc_input_selected_SBx(struct hw *hw, enum ADCSRC type)
 {
-        u32 data = 0;
+        u32 data;
 
         data = hw_read_20kx(hw, GPIO);
         switch (type) {
@@ -1521,7 +1520,7 @@ static int is_adc_input_selected_SBx(struct hw *hw, enum ADCSRC type)
 
 static int is_adc_input_selected_hendrix(struct hw *hw, enum ADCSRC type)
 {
-        u32 data = 0;
+        u32 data;
 
         data = hw_read_20kx(hw, GPIO);
         switch (type) {
@@ -1539,7 +1538,7 @@ static int is_adc_input_selected_hendrix(struct hw *hw, enum ADCSRC type)
 
 static int hw_is_adc_input_selected(struct hw *hw, enum ADCSRC type)
 {
-        u16 subsys_id = 0;
+        u16 subsys_id;
 
         pci_read_config_word(hw->pci, PCI_SUBSYSTEM_ID, &subsys_id);
         if ((subsys_id == 0x0022) || (subsys_id == 0x002F)) {
@@ -1559,7 +1558,7 @@ static int hw_is_adc_input_selected(struct hw *hw, enum ADCSRC type)
 static int
 adc_input_select_SB055x(struct hw *hw, enum ADCSRC type, unsigned char boost)
 {
-        u32 data = 0;
+        u32 data;
 
         /*
          * check and set the following GPIO bits accordingly
@@ -1599,9 +1598,9 @@ adc_input_select_SB055x(struct hw *hw, enum ADCSRC type, unsigned char boost)
 static int
 adc_input_select_SBx(struct hw *hw, enum ADCSRC type, unsigned char boost)
 {
-        u32 data = 0;
-        u32 i2c_data = 0;
-        unsigned int ret = 0;
+        u32 data;
+        u32 i2c_data;
+        unsigned int ret;
 
         if (i2c_unlock(hw))
                 return -1;
@@ -1649,9 +1648,9 @@ adc_input_select_SBx(struct hw *hw, enum ADCSRC type, unsigned char boost)
 static int
 adc_input_select_hendrix(struct hw *hw, enum ADCSRC type, unsigned char boost)
 {
-        u32 data = 0;
-        u32 i2c_data = 0;
-        unsigned int ret = 0;
+        u32 data;
+        u32 i2c_data;
+        unsigned int ret;
 
         if (i2c_unlock(hw))
                 return -1;
@@ -1693,7 +1692,7 @@ adc_input_select_hendrix(struct hw *hw, enum ADCSRC type, unsigned char boost)
 
 static int hw_adc_input_select(struct hw *hw, enum ADCSRC type)
 {
-        u16 subsys_id = 0;
+        u16 subsys_id;
 
         pci_read_config_word(hw->pci, PCI_SUBSYSTEM_ID, &subsys_id);
         if ((subsys_id == 0x0022) || (subsys_id == 0x002F)) {
@@ -1719,8 +1718,8 @@ static int adc_init_SBx(struct hw *hw, int input, int mic20db)
 {
         u16 gpioorg;
         u16 input_source;
-        u32 adcdata = 0;
-        unsigned int ret = 0;
+        u32 adcdata;
+        unsigned int ret;
 
         input_source = 0x100;  /* default to analog */
         switch (input) {
@@ -1742,6 +1741,7 @@ static int adc_init_SBx(struct hw *hw, int input, int mic20db)
                 input_source = 0x0;  /* set to Digital */
                 break;
         default:
+                adcdata = 0x0;
                 break;
         }
 
@@ -1781,8 +1781,8 @@ static int adc_init_SBx(struct hw *hw, int input, int mic20db)
 
 static int hw_adc_init(struct hw *hw, const struct adc_conf *info)
 {
-        int err = 0;
-        u16 subsys_id = 0;
+        int err;
+        u16 subsys_id;
 
         pci_read_config_word(hw->pci, PCI_SUBSYSTEM_ID, &subsys_id);
         if ((subsys_id == 0x0022) || (subsys_id == 0x002F)) {
@@ -1797,7 +1797,7 @@ static int hw_adc_init(struct hw *hw, const struct adc_conf *info)
 
 static int hw_have_digit_io_switch(struct hw *hw)
 {
-        u16 subsys_id = 0;
+        u16 subsys_id;
 
         pci_read_config_word(hw->pci, PCI_SUBSYSTEM_ID, &subsys_id);
         /* SB073x and Vista compatible cards have no digit IO switch */
@@ -1814,11 +1814,11 @@ static int uaa_to_xfi(struct pci_dev *pci)
 {
         unsigned int bar0, bar1, bar2, bar3, bar4, bar5;
         unsigned int cmd, irq, cl_size, l_timer, pwr;
-        unsigned int is_uaa = 0;
+        unsigned int is_uaa;
         unsigned int data[4] = {0};
         unsigned int io_base;
         void *mem_base;
-        int i = 0;
+        int i;
         const u32 CTLX = CTLBITS('C', 'T', 'L', 'X');
         const u32 CTL_ = CTLBITS('C', 'T', 'L', '-');
         const u32 CTLF = CTLBITS('C', 'T', 'L', 'F');
@@ -1916,9 +1916,9 @@ static irqreturn_t ct_20k1_interrupt(int irq, void *dev_id)
 
 static int hw_card_start(struct hw *hw)
 {
-        int err = 0;
+        int err;
         struct pci_dev *pci = hw->pci;
-        u16 subsys_id = 0;
+        u16 subsys_id;
 
         err = pci_enable_device(pci);
         if (err < 0)
@@ -2004,8 +2004,8 @@ static int hw_card_init(struct hw *hw, struct card_conf *info)
 {
         int err;
         unsigned int gctl;
-        u16 subsys_id = 0;
-        u32 data = 0;
+        u16 subsys_id;
+        u32 data;
         struct dac_conf dac_info = {0};
         struct adc_conf adc_info = {0};
         struct daio_conf daio_info = {0};
diff --git a/sound/pci/ctxfi/cthw20k2.c b/sound/pci/ctxfi/cthw20k2.c
index edbfb4827469..7d6dcbaf5244 100644
--- a/sound/pci/ctxfi/cthw20k2.c
+++ b/sound/pci/ctxfi/cthw20k2.c
@@ -168,7 +168,7 @@ static int src_get_rsc_ctrl_blk(void **rblk)
 
 static int src_put_rsc_ctrl_blk(void *blk)
 {
-        kfree((struct src_rsc_ctrl_blk *)blk);
+        kfree(blk);
 
         return 0;
 }
@@ -359,7 +359,7 @@ static unsigned int src_param_pitch_mixer(unsigned int src_idx)
 static int src_commit_write(struct hw *hw, unsigned int idx, void *blk)
 {
         struct src_rsc_ctrl_blk *ctl = blk;
-        int i = 0;
+        int i;
 
         if (ctl->dirty.bf.czbfs) {
                 /* Clear Z-Buffer registers */
@@ -458,8 +458,8 @@ static int src_mgr_dsb_src(void *blk, unsigned int idx)
 static int src_mgr_commit_write(struct hw *hw, void *blk)
 {
         struct src_mgr_ctrl_blk *ctl = blk;
-        int i = 0;
-        unsigned int ret = 0;
+        int i;
+        unsigned int ret;
 
         if (ctl->dirty.bf.enbsa) {
                 do {
@@ -494,7 +494,7 @@ static int src_mgr_get_ctrl_blk(void **rblk)
 
 static int src_mgr_put_ctrl_blk(void *blk)
 {
-        kfree((struct src_mgr_ctrl_blk *)blk);
+        kfree(blk);
 
         return 0;
 }
@@ -515,7 +515,7 @@ static int srcimp_mgr_get_ctrl_blk(void **rblk)
 
 static int srcimp_mgr_put_ctrl_blk(void *blk)
 {
-        kfree((struct srcimp_mgr_ctrl_blk *)blk);
+        kfree(blk);
 
         return 0;
 }
@@ -704,7 +704,7 @@ static int amixer_rsc_get_ctrl_blk(void **rblk)
 
 static int amixer_rsc_put_ctrl_blk(void *blk)
 {
-        kfree((struct amixer_rsc_ctrl_blk *)blk);
+        kfree(blk);
 
         return 0;
 }
@@ -893,7 +893,7 @@ static int dai_get_ctrl_blk(void **rblk)
 
 static int dai_put_ctrl_blk(void *blk)
 {
-        kfree((struct dai_ctrl_blk *)blk);
+        kfree(blk);
 
         return 0;
 }
@@ -943,7 +943,7 @@ static int dao_get_ctrl_blk(void **rblk)
 
 static int dao_put_ctrl_blk(void *blk)
 {
-        kfree((struct dao_ctrl_blk *)blk);
+        kfree(blk);
 
         return 0;
 }
@@ -1051,8 +1051,8 @@ static int daio_mgr_set_imapaddr(void *blk, unsigned int addr)
 static int daio_mgr_commit_write(struct hw *hw, void *blk)
 {
         struct daio_mgr_ctrl_blk *ctl = blk;
-        unsigned int data = 0;
-        int i = 0;
+        unsigned int data;
+        int i;
 
         for (i = 0; i < 8; i++) {
                 if ((ctl->dirty.bf.atxctl & (0x1 << i))) {
@@ -1080,7 +1080,7 @@ static int daio_mgr_commit_write(struct hw *hw, void *blk)
 static int daio_mgr_get_ctrl_blk(struct hw *hw, void **rblk)
 {
         struct daio_mgr_ctrl_blk *blk;
-        int i = 0;
+        int i;
 
         *rblk = NULL;
         blk = kzalloc(sizeof(*blk), GFP_KERNEL);
@@ -1099,7 +1099,7 @@ static int daio_mgr_get_ctrl_blk(struct hw *hw, void **rblk)
 
 static int daio_mgr_put_ctrl_blk(void *blk)
 {
-        kfree((struct daio_mgr_ctrl_blk *)blk);
+        kfree(blk);
 
         return 0;
 }
@@ -1125,7 +1125,7 @@ struct trn_conf {
 
 static int hw_daio_init(struct hw *hw, const struct daio_conf *info)
 {
-        u32 dwData = 0;
+        u32 dwData;
         int i;
 
         /* Program I2S with proper sample rate and enable the correct I2S
@@ -1195,9 +1195,9 @@ static int hw_daio_init(struct hw *hw, const struct daio_conf *info)
 /* TRANSPORT operations */
 static int hw_trn_init(struct hw *hw, const struct trn_conf *info)
 {
-        u32 vmctl = 0, data = 0;
-        unsigned long ptp_phys_low = 0, ptp_phys_high = 0;
-        int i = 0;
+        u32 vmctl, data;
+        u32 ptp_phys_low, ptp_phys_high;
+        int i;
 
         /* Set up device page table */
         if ((~0UL) == info->vm_pgt_phys) {
@@ -1433,7 +1433,7 @@ static int I2CLockChip(struct hw *hw)
 
 static int I2CInit(struct hw *hw, u8 bDeviceID, u8 bAddressSize, u8 bDataSize)
 {
-        int err = 0;
+        int err;
         unsigned int RegI2CStatus;
         unsigned int RegI2CAddress;
 
@@ -1481,7 +1481,7 @@ static int I2CUninit(struct hw *hw)
 static int I2CWaitDataReady(struct hw *hw)
 {
         int i = 0x400000;
-        unsigned int ret = 0;
+        unsigned int ret;
 
         do {
                 ret = hw_read_20kx(hw, I2C_IF_STATUS);
@@ -1541,9 +1541,9 @@ static int I2CWrite(struct hw *hw, u16 wAddress, u32 dwData)
 
 static int hw_dac_init(struct hw *hw, const struct dac_conf *info)
 {
-        int err = 0;
-        u32 dwData = 0;
-        int i = 0;
+        int err;
+        u32 dwData;
+        int i;
         struct REGS_CS4382 cs4382_Read = {0};
         struct REGS_CS4382 cs4382_Def = {
                                    0x00000001,  /* Mode Control 1 */
@@ -1696,7 +1696,7 @@ End:
 
 static int hw_is_adc_input_selected(struct hw *hw, enum ADCSRC type)
 {
-        u32 data = 0;
+        u32 data;
 
         data = hw_read_20kx(hw, GPIO_DATA);
         switch (type) {
@@ -1714,7 +1714,7 @@ static int hw_is_adc_input_selected(struct hw *hw, enum ADCSRC type)
 
 static int hw_adc_input_select(struct hw *hw, enum ADCSRC type)
 {
-        u32 data = 0;
+        u32 data;
 
         data = hw_read_20kx(hw, GPIO_DATA);
         switch (type) {
@@ -1747,8 +1747,8 @@ static int hw_adc_input_select(struct hw *hw, enum ADCSRC type)
 
 static int hw_adc_init(struct hw *hw, const struct adc_conf *info)
 {
-        int err = 0;
-        u32 dwMux = 2, dwData = 0, dwCtl = 0;
+        int err;
+        u32 dwMux = 2, dwData, dwCtl;
 
         /*  Set ADC reset bit as output */
         dwData = hw_read_20kx(hw, GPIO_CTRL);
diff --git a/sound/pci/ctxfi/ctimap.c b/sound/pci/ctxfi/ctimap.c
index d34eacd902ce..0b73368a4df6 100644
--- a/sound/pci/ctxfi/ctimap.c
+++ b/sound/pci/ctxfi/ctimap.c
@@ -99,8 +99,8 @@ int input_mapper_delete(struct list_head *mappers, struct imapper *entry,
 
 void free_input_mapper_list(struct list_head *head)
 {
-        struct imapper *entry = NULL;
-        struct list_head *pos = NULL;
+        struct imapper *entry;
+        struct list_head *pos;
 
         while (!list_empty(head)) {
                 pos = head->next;
diff --git a/sound/pci/ctxfi/ctmixer.c b/sound/pci/ctxfi/ctmixer.c
index 796156e4bd38..666722d9de41 100644
--- a/sound/pci/ctxfi/ctmixer.c
+++ b/sound/pci/ctxfi/ctmixer.c
@@ -298,7 +298,7 @@ set_switch_state(struct ct_mixer *mixer,
  * from 2^-6 to (1+1023/1024) */
 static unsigned int uint16_to_float14(unsigned int x)
 {
-        unsigned int i = 0;
+        unsigned int i;
 
         if (x < 17)
                 return 0;
@@ -318,7 +318,7 @@ static unsigned int uint16_to_float14(unsigned int x)
 
 static unsigned int float14_to_uint16(unsigned int x)
 {
-        unsigned int e = 0;
+        unsigned int e;
 
         if (!x)
                 return x;
@@ -491,7 +491,7 @@ static int ct_alsa_mix_switch_put(struct snd_kcontrol *kcontrol,
         struct ct_atc *atc = snd_kcontrol_chip(kcontrol);
         struct ct_mixer *mixer = atc->mixer;
         enum CTALSA_MIXER_CTL type = kcontrol->private_value;
-        int state = 0;
+        int state;
 
         state = ucontrol->value.integer.value[0];
         if (get_switch_state(mixer, type) == state)
@@ -574,7 +574,7 @@ static int ct_spdif_get(struct snd_kcontrol *kcontrol,
                         struct snd_ctl_elem_value *ucontrol)
 {
         struct ct_atc *atc = snd_kcontrol_chip(kcontrol);
-        unsigned int status = 0;
+        unsigned int status;
 
         atc->spdif_out_get_status(atc, &status);
         ucontrol->value.iec958.status[0] = (status >> 0) & 0xff;
@@ -589,8 +589,8 @@ static int ct_spdif_put(struct snd_kcontrol *kcontrol,
                         struct snd_ctl_elem_value *ucontrol)
 {
         struct ct_atc *atc = snd_kcontrol_chip(kcontrol);
-        int change = 1;
-        unsigned int status = 0, old_status = 0;
+        int change;
+        unsigned int status, old_status;
 
         status = (ucontrol->value.iec958.status[0] << 0) |
                  (ucontrol->value.iec958.status[1] << 8) |
@@ -641,8 +641,8 @@ static struct snd_kcontrol_new iec958_ctl = {
 static int
 ct_mixer_kcontrol_new(struct ct_mixer *mixer, struct snd_kcontrol_new *new)
 {
-        struct snd_kcontrol *kctl = NULL;
-        int err = 0;
+        struct snd_kcontrol *kctl;
+        int err;
 
         kctl = snd_ctl_new1(new, mixer->atc);
         if (NULL == kctl)
@@ -669,9 +669,9 @@ ct_mixer_kcontrol_new(struct ct_mixer *mixer, struct snd_kcontrol_new *new)
 
 static int ct_mixer_kcontrols_create(struct ct_mixer *mixer)
 {
-        enum CTALSA_MIXER_CTL type = 0;
+        enum CTALSA_MIXER_CTL type;
         struct ct_atc *atc = mixer->atc;
-        int err = 0;
+        int err;
 
         /* Create snd kcontrol instances on demand */
         for (type = VOL_MIXER_START; type <= VOL_MIXER_END; type++) {
@@ -733,9 +733,9 @@ static int ct_mixer_kcontrols_create(struct ct_mixer *mixer)
 static void
 ct_mixer_recording_select(struct ct_mixer *mixer, enum CT_AMIXER_CTL type)
 {
-        struct amixer *amix_d = NULL;
-        struct sum *sum_c = NULL;
-        int i = 0;
+        struct amixer *amix_d;
+        struct sum *sum_c;
+        int i;
 
         for (i = 0; i < 2; i++) {
                 amix_d = mixer->amixers[type*CHN_NUM+i];
@@ -748,8 +748,8 @@ ct_mixer_recording_select(struct ct_mixer *mixer, enum CT_AMIXER_CTL type)
 static void
 ct_mixer_recording_unselect(struct ct_mixer *mixer, enum CT_AMIXER_CTL type)
 {
-        struct amixer *amix_d = NULL;
-        int i = 0;
+        struct amixer *amix_d;
+        int i;
 
         for (i = 0; i < 2; i++) {
                 amix_d = mixer->amixers[type*CHN_NUM+i];
@@ -760,14 +760,14 @@ ct_mixer_recording_unselect(struct ct_mixer *mixer, enum CT_AMIXER_CTL type)
 
 static int ct_mixer_get_resources(struct ct_mixer *mixer)
 {
-        struct sum_mgr *sum_mgr = NULL;
-        struct sum *sum = NULL;
+        struct sum_mgr *sum_mgr;
+        struct sum *sum;
         struct sum_desc sum_desc = {0};
-        struct amixer_mgr *amixer_mgr = NULL;
-        struct amixer *amixer = NULL;
+        struct amixer_mgr *amixer_mgr;
+        struct amixer *amixer;
         struct amixer_desc am_desc = {0};
-        int err = 0;
-        int i = 0;
+        int err;
+        int i;
 
         /* Allocate sum resources for mixer obj */
         sum_mgr = (struct sum_mgr *)mixer->atc->rsc_mgrs[SUM];
@@ -822,8 +822,8 @@ error1:
 
 static int ct_mixer_get_mem(struct ct_mixer **rmixer)
 {
-        struct ct_mixer *mixer = NULL;
-        int err = 0;
+        struct ct_mixer *mixer;
+        int err;
 
         *rmixer = NULL;
         /* Allocate mem for mixer obj */
@@ -855,9 +855,9 @@ error1:
 
 static int ct_mixer_topology_build(struct ct_mixer *mixer)
 {
-        struct sum *sum = NULL;
-        struct amixer *amix_d = NULL, *amix_s = NULL;
-        enum CT_AMIXER_CTL i = 0, j = 0;
+        struct sum *sum;
+        struct amixer *amix_d, *amix_s;
+        enum CT_AMIXER_CTL i, j;
 
         /* Build topology from destination to source */
 
@@ -1044,7 +1044,7 @@ int ct_mixer_destroy(struct ct_mixer *mixer)
         struct sum_mgr *sum_mgr = (struct sum_mgr *)mixer->atc->rsc_mgrs[SUM];
         struct amixer_mgr *amixer_mgr =
                         (struct amixer_mgr *)mixer->atc->rsc_mgrs[AMIXER];
-        struct amixer *amixer = NULL;
+        struct amixer *amixer;
         int i = 0;
 
         /* Release amixer resources */
@@ -1071,8 +1071,8 @@ int ct_mixer_destroy(struct ct_mixer *mixer)
 
 int ct_mixer_create(struct ct_atc *atc, struct ct_mixer **rmixer)
 {
-        struct ct_mixer *mixer = NULL;
-        int err = 0;
+        struct ct_mixer *mixer;
+        int err;
 
         *rmixer = NULL;
 
@@ -1109,7 +1109,7 @@ int ct_alsa_mix_create(struct ct_atc *atc,
                        enum CTALSADEVS device,
                        const char *device_name)
 {
-        int err = 0;
+        int err;
 
         /* Create snd kcontrol instances on demand */
         /* vol_ctl.device = swh_ctl.device = device; */ /* better w/ device 0 */
diff --git a/sound/pci/ctxfi/ctresource.c b/sound/pci/ctxfi/ctresource.c
index da21a717a07a..889c495bb7d1 100644
--- a/sound/pci/ctxfi/ctresource.c
+++ b/sound/pci/ctxfi/ctresource.c
@@ -27,7 +27,7 @@ static int
 get_resource(u8 *rscs, unsigned int amount,
              unsigned int multi, unsigned int *ridx)
 {
-        int i = 0, j = 0, k = 0, n = 0;
+        int i, j, k, n;
 
         /* Check whether there are sufficient resources to meet request. */
         for (i = 0, n = multi; i < amount; i++) {
@@ -61,7 +61,7 @@ get_resource(u8 *rscs, unsigned int amount,
 
 static int put_resource(u8 *rscs, unsigned int multi, unsigned int idx)
 {
-        unsigned int i = 0, j = 0, k = 0, n = 0;
+        unsigned int i, j, k, n;
 
         /* Mark the contiguous bits in resource bit-map as used */
         for (n = multi, i = idx; n > 0; n--) {
@@ -76,7 +76,7 @@ static int put_resource(u8 *rscs, unsigned int multi, unsigned int idx)
 
 int mgr_get_resource(struct rsc_mgr *mgr, unsigned int n, unsigned int *ridx)
 {
-        int err = 0;
+        int err;
 
         if (n > mgr->avail)
                 return -ENOENT;
diff --git a/sound/pci/ctxfi/ctsrc.c b/sound/pci/ctxfi/ctsrc.c
index 77e118c5bc97..e1c145d8b702 100644
--- a/sound/pci/ctxfi/ctsrc.c
+++ b/sound/pci/ctxfi/ctsrc.c
@@ -37,9 +37,9 @@ static int (*src_default_config[3])(struct src *) = {
 
 static int src_set_state(struct src *src, unsigned int state)
 {
-        struct hw *hw = NULL;
+        struct hw *hw;
 
-        hw = (struct hw *)src->rsc.hw;
+        hw = src->rsc.hw;
         hw->src_set_state(src->rsc.ctrl_blk, state);
 
         return 0;
@@ -47,9 +47,9 @@ static int src_set_state(struct src *src, unsigned int state)
 
 static int src_set_bm(struct src *src, unsigned int bm)
 {
-        struct hw *hw = NULL;
+        struct hw *hw;
 
-        hw = (struct hw *)src->rsc.hw;
+        hw = src->rsc.hw;
         hw->src_set_bm(src->rsc.ctrl_blk, bm);
 
         return 0;
@@ -57,9 +57,9 @@ static int src_set_bm(struct src *src, unsigned int bm)
 
 static int src_set_sf(struct src *src, unsigned int sf)
 {
-        struct hw *hw = NULL;
+        struct hw *hw;
 
-        hw = (struct hw *)src->rsc.hw;
+        hw = src->rsc.hw;
         hw->src_set_sf(src->rsc.ctrl_blk, sf);
 
         return 0;
@@ -67,9 +67,9 @@ static int src_set_sf(struct src *src, unsigned int sf)
 
 static int src_set_pm(struct src *src, unsigned int pm)
 {
-        struct hw *hw = NULL;
+        struct hw *hw;
 
-        hw = (struct hw *)src->rsc.hw;
+        hw = src->rsc.hw;
         hw->src_set_pm(src->rsc.ctrl_blk, pm);
 
         return 0;
@@ -77,9 +77,9 @@ static int src_set_pm(struct src *src, unsigned int pm)
 
 static int src_set_rom(struct src *src, unsigned int rom)
 {
-        struct hw *hw = NULL;
+        struct hw *hw;
 
-        hw = (struct hw *)src->rsc.hw;
+        hw = src->rsc.hw;
         hw->src_set_rom(src->rsc.ctrl_blk, rom);
 
         return 0;
@@ -87,9 +87,9 @@ static int src_set_rom(struct src *src, unsigned int rom)
 
 static int src_set_vo(struct src *src, unsigned int vo)
 {
-        struct hw *hw = NULL;
+        struct hw *hw;
 
-        hw = (struct hw *)src->rsc.hw;
+        hw = src->rsc.hw;
         hw->src_set_vo(src->rsc.ctrl_blk, vo);
 
         return 0;
@@ -97,9 +97,9 @@ static int src_set_vo(struct src *src, unsigned int vo)
 
 static int src_set_st(struct src *src, unsigned int st)
 {
-        struct hw *hw = NULL;
+        struct hw *hw;
 
-        hw = (struct hw *)src->rsc.hw;
+        hw = src->rsc.hw;
         hw->src_set_st(src->rsc.ctrl_blk, st);
 
         return 0;
@@ -107,9 +107,9 @@ static int src_set_st(struct src *src, unsigned int st)
 
 static int src_set_bp(struct src *src, unsigned int bp)
 {
-        struct hw *hw = NULL;
+        struct hw *hw;
 
-        hw = (struct hw *)src->rsc.hw;
+        hw = src->rsc.hw;
         hw->src_set_bp(src->rsc.ctrl_blk, bp);
 
         return 0;
@@ -117,9 +117,9 @@ static int src_set_bp(struct src *src, unsigned int bp)
 
 static int src_set_cisz(struct src *src, unsigned int cisz)
 {
-        struct hw *hw = NULL;
+        struct hw *hw;
 
-        hw = (struct hw *)src->rsc.hw;
+        hw = src->rsc.hw;
         hw->src_set_cisz(src->rsc.ctrl_blk, cisz);
 
         return 0;
@@ -127,9 +127,9 @@ static int src_set_cisz(struct src *src, unsigned int cisz)
 
 static int src_set_ca(struct src *src, unsigned int ca)
 {
-        struct hw *hw = NULL;
+        struct hw *hw;
 
-        hw = (struct hw *)src->rsc.hw;
+        hw = src->rsc.hw;
         hw->src_set_ca(src->rsc.ctrl_blk, ca);
 
         return 0;
@@ -137,9 +137,9 @@ static int src_set_ca(struct src *src, unsigned int ca)
 
 static int src_set_sa(struct src *src, unsigned int sa)
 {
-        struct hw *hw = NULL;
+        struct hw *hw;
 
-        hw = (struct hw *)src->rsc.hw;
+        hw = src->rsc.hw;
         hw->src_set_sa(src->rsc.ctrl_blk, sa);
 
         return 0;
@@ -147,9 +147,9 @@ static int src_set_sa(struct src *src, unsigned int sa)
 
 static int src_set_la(struct src *src, unsigned int la)
 {
-        struct hw *hw = NULL;
+        struct hw *hw;
 
-        hw = (struct hw *)src->rsc.hw;
+        hw = src->rsc.hw;
         hw->src_set_la(src->rsc.ctrl_blk, la);
 
         return 0;
@@ -157,9 +157,9 @@ static int src_set_la(struct src *src, unsigned int la)
 
 static int src_set_pitch(struct src *src, unsigned int pitch)
 {
-        struct hw *hw = NULL;
+        struct hw *hw;
 
-        hw = (struct hw *)src->rsc.hw;
+        hw = src->rsc.hw;
         hw->src_set_pitch(src->rsc.ctrl_blk, pitch);
 
         return 0;
@@ -167,9 +167,9 @@ static int src_set_pitch(struct src *src, unsigned int pitch)
 
 static int src_set_clear_zbufs(struct src *src)
 {
-        struct hw *hw = NULL;
+        struct hw *hw;
 
-        hw = (struct hw *)src->rsc.hw;
+        hw = src->rsc.hw;
         hw->src_set_clear_zbufs(src->rsc.ctrl_blk, 1);
 
         return 0;
@@ -177,11 +177,11 @@ static int src_set_clear_zbufs(struct src *src)
 
 static int src_commit_write(struct src *src)
 {
-        struct hw *hw = NULL;
-        int i = 0;
+        struct hw *hw;
+        int i;
         unsigned int dirty = 0;
 
-        hw = (struct hw *)src->rsc.hw;
+        hw = src->rsc.hw;
         src->rsc.ops->master(&src->rsc);
         if (src->rsc.msr > 1) {
                 /* Save dirty flags for conjugate resource programming */
@@ -207,9 +207,9 @@ static int src_commit_write(struct src *src)
 
 static int src_get_ca(struct src *src)
 {
-        struct hw *hw = NULL;
+        struct hw *hw;
 
-        hw = (struct hw *)src->rsc.hw;
+        hw = src->rsc.hw;
         return hw->src_get_ca(hw, src->rsc.ops->index(&src->rsc),
                                                 src->rsc.ctrl_blk);
 }
@@ -229,7 +229,7 @@ static struct src *src_next_interleave(struct src *src)
 static int src_default_config_memrd(struct src *src)
 {
         struct hw *hw = src->rsc.hw;
-        unsigned int rsr = 0, msr = 0;
+        unsigned int rsr, msr;
 
         hw->src_set_state(src->rsc.ctrl_blk, SRC_STATE_OFF);
         hw->src_set_bm(src->rsc.ctrl_blk, 1);
@@ -297,7 +297,7 @@ static int src_default_config_memwr(struct src *src)
 static int src_default_config_arcrw(struct src *src)
 {
         struct hw *hw = src->rsc.hw;
-        unsigned int rsr = 0, msr = 0;
+        unsigned int rsr, msr;
         unsigned int dirty;
 
         hw->src_set_state(src->rsc.ctrl_blk, SRC_STATE_OFF);
@@ -360,8 +360,8 @@ static int
 src_rsc_init(struct src *src, u32 idx,
              const struct src_desc *desc, struct src_mgr *mgr)
 {
-        int err = 0;
-        int i = 0, n = 0;
+        int err;
+        int i, n;
         struct src *p;
 
         n = (MEMRD == desc->mode) ? desc->multi : 1;
@@ -395,7 +395,7 @@ error1:
 
 static int src_rsc_uninit(struct src *src, struct src_mgr *mgr)
 {
-        int i = 0, n = 0;
+        int i, n;
         struct src *p;
 
         n = (MEMRD == src->mode) ? src->multi : 1;
@@ -416,8 +416,8 @@ static int
 get_src_rsc(struct src_mgr *mgr, const struct src_desc *desc, struct src **rsrc)
 {
         unsigned int idx = SRC_RESOURCE_NUM;
-        int err = 0;
-        struct src *src = NULL;
+        int err;
+        struct src *src;
         unsigned long flags;
 
         *rsrc = NULL;
@@ -489,7 +489,7 @@ static int put_src_rsc(struct src_mgr *mgr, struct src *src)
 static int src_enable_s(struct src_mgr *mgr, struct src *src)
 {
         struct hw *hw = mgr->mgr.hw;
-        int i = 0;
+        int i;
 
         src->rsc.ops->master(&src->rsc);
         for (i = 0; i < src->rsc.msr; i++) {
@@ -505,7 +505,7 @@ static int src_enable_s(struct src_mgr *mgr, struct src *src)
 static int src_enable(struct src_mgr *mgr, struct src *src)
 {
         struct hw *hw = mgr->mgr.hw;
-        int i = 0;
+        int i;
 
         src->rsc.ops->master(&src->rsc);
         for (i = 0; i < src->rsc.msr; i++) {
@@ -521,7 +521,7 @@ static int src_enable(struct src_mgr *mgr, struct src *src)
 static int src_disable(struct src_mgr *mgr, struct src *src)
 {
         struct hw *hw = mgr->mgr.hw;
-        int i = 0;
+        int i;
 
         src->rsc.ops->master(&src->rsc);
         for (i = 0; i < src->rsc.msr; i++) {
@@ -545,7 +545,7 @@ static int src_mgr_commit_write(struct src_mgr *mgr)
 
 int src_mgr_create(void *hw, struct src_mgr **rsrc_mgr)
 {
-        int err = 0, i = 0;
+        int err, i;
         struct src_mgr *src_mgr;
 
         *rsrc_mgr = NULL;
@@ -618,8 +618,8 @@ static struct rsc_ops srcimp_basic_rsc_ops = {
 
 static int srcimp_map(struct srcimp *srcimp, struct src *src, struct rsc *input)
 {
-        struct imapper *entry = NULL;
-        int i = 0;
+        struct imapper *entry;
+        int i;
 
         srcimp->rsc.ops->master(&srcimp->rsc);
         src->rsc.ops->master(&src->rsc);
@@ -646,7 +646,7 @@ static int srcimp_map(struct srcimp *srcimp, struct src *src, struct rsc *input)
 
 static int srcimp_unmap(struct srcimp *srcimp)
 {
-        int i = 0;
+        int i;
 
         /* Program master and conjugate resources */
         for (i = 0; i < srcimp->rsc.msr; i++) {
@@ -669,7 +669,7 @@ static int srcimp_rsc_init(struct srcimp *srcimp,
                            const struct srcimp_desc *desc,
                            struct srcimp_mgr *mgr)
 {
-        int err = 0;
+        int err;
 
         err = rsc_init(&srcimp->rsc, srcimp->idx[0],
                        SRCIMP, desc->msr, mgr->mgr.hw);
@@ -715,9 +715,9 @@ static int get_srcimp_rsc(struct srcimp_mgr *mgr,
                           const struct srcimp_desc *desc,
                           struct srcimp **rsrcimp)
 {
-        int err = 0, i = 0;
-        unsigned int idx = 0;
-        struct srcimp *srcimp = NULL;
+        int err, i;
+        unsigned int idx;
+        struct srcimp *srcimp;
         unsigned long flags;
 
         *rsrcimp = NULL;
@@ -765,7 +765,7 @@ error1:
 static int put_srcimp_rsc(struct srcimp_mgr *mgr, struct srcimp *srcimp)
 {
         unsigned long flags;
-        int i = 0;
+        int i;
 
         spin_lock_irqsave(&mgr->mgr_lock, flags);
         for (i = 0; i < srcimp->rsc.msr; i++)
@@ -795,7 +795,7 @@ static int srcimp_map_op(void *data, struct imapper *entry)
 static int srcimp_imap_add(struct srcimp_mgr *mgr, struct imapper *entry)
 {
         unsigned long flags;
-        int err = 0;
+        int err;
 
         spin_lock_irqsave(&mgr->imap_lock, flags);
         if ((0 == entry->addr) && (mgr->init_imap_added)) {
@@ -812,7 +812,7 @@ static int srcimp_imap_add(struct srcimp_mgr *mgr, struct imapper *entry)
 static int srcimp_imap_delete(struct srcimp_mgr *mgr, struct imapper *entry)
 {
         unsigned long flags;
-        int err = 0;
+        int err;
 
         spin_lock_irqsave(&mgr->imap_lock, flags);
         err = input_mapper_delete(&mgr->imappers, entry, srcimp_map_op, mgr);
@@ -828,7 +828,7 @@ static int srcimp_imap_delete(struct srcimp_mgr *mgr, struct imapper *entry)
 
 int srcimp_mgr_create(void *hw, struct srcimp_mgr **rsrcimp_mgr)
 {
-        int err = 0;
+        int err;
         struct srcimp_mgr *srcimp_mgr;
         struct imapper *entry;
 
diff --git a/sound/pci/ctxfi/ctvmem.c b/sound/pci/ctxfi/ctvmem.c
index b7f8e58ae07d..67665a7e43c6 100644
--- a/sound/pci/ctxfi/ctvmem.c
+++ b/sound/pci/ctxfi/ctvmem.c
@@ -31,8 +31,8 @@
 static struct ct_vm_block *
 get_vm_block(struct ct_vm *vm, unsigned int size)
 {
-        struct ct_vm_block *block = NULL, *entry = NULL;
-        struct list_head *pos = NULL;
+        struct ct_vm_block *block = NULL, *entry;
+        struct list_head *pos;
 
         size = CT_PAGE_ALIGN(size);
         if (size > vm->size) {
@@ -77,8 +77,8 @@ get_vm_block(struct ct_vm *vm, unsigned int size)
 
 static void put_vm_block(struct ct_vm *vm, struct ct_vm_block *block)
 {
-        struct ct_vm_block *entry = NULL, *pre_ent = NULL;
-        struct list_head *pos = NULL, *pre = NULL;
+        struct ct_vm_block *entry, *pre_ent;
+        struct list_head *pos, *pre;
 
         block->size = CT_PAGE_ALIGN(block->size);
 
@@ -223,8 +223,8 @@ int ct_vm_create(struct ct_vm **rvm)
 void ct_vm_destroy(struct ct_vm *vm)
 {
         int i;
-        struct list_head *pos = NULL;
-        struct ct_vm_block *entry = NULL;
+        struct list_head *pos;
+        struct ct_vm_block *entry;
 
         /* free used and unused list nodes */
         while (!list_empty(&vm->used)) {