ALSA: Cleanup redundant tests on unsigned

The variables are unsigned so the test `>= 0' is always true,
the `< 0' test always fails. In these cases the other part of
the test catches wrapped values.

In dac_audio_write() there does not occur a test for wrapped
values, but the test appears redundant.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

7 files changed, 8 insertions, 12 deletions

diff --git a/sound/oss/sh_dac_audio.c b/sound/oss/sh_dac_audio.c
index b2ed8757542a..4153752507e3 100644
--- a/sound/oss/sh_dac_audio.c
+++ b/sound/oss/sh_dac_audio.c
@@ -164,9 +164,6 @@ static ssize_t dac_audio_write(struct file *file, const char *buf, size_t count,
         int free;
         int nbytes;
 
-        if (count < 0)
-                return -EINVAL;
-
         if (!count) {
                 dac_audio_sync();
                 return 0;
diff --git a/sound/pci/ca0106/ca0106_proc.c b/sound/pci/ca0106/ca0106_proc.c
index c62b7d10ec61..15523e60351c 100644
--- a/sound/pci/ca0106/ca0106_proc.c
+++ b/sound/pci/ca0106/ca0106_proc.c
@@ -304,7 +304,7 @@ static void snd_ca0106_proc_reg_write32(struct snd_info_entry *entry,
         while (!snd_info_get_line(buffer, line, sizeof(line))) {
                 if (sscanf(line, "%x %x", &reg, &val) != 2)
                         continue;
-                if ((reg < 0x40) && (reg >=0) && (val <= 0xffffffff) ) {
+                if (reg < 0x40 && val <= 0xffffffff) {
                         spin_lock_irqsave(&emu->emu_lock, flags);
                         outl(val, emu->port + (reg & 0xfffffffc));
                         spin_unlock_irqrestore(&emu->emu_lock, flags);
@@ -405,7 +405,7 @@ static void snd_ca0106_proc_reg_write(struct snd_info_entry *entry,
         while (!snd_info_get_line(buffer, line, sizeof(line))) {
                 if (sscanf(line, "%x %x %x", &reg, &channel_id, &val) != 3)
                         continue;
-                if ((reg < 0x80) && (reg >=0) && (val <= 0xffffffff) && (channel_id >=0) && (channel_id <= 3) )
+                if (reg < 0x80 && val <= 0xffffffff && channel_id <= 3)
                         snd_ca0106_ptr_write(emu, reg, channel_id, val);
         }
 }
diff --git a/sound/pci/ctxfi/ctatc.c b/sound/pci/ctxfi/ctatc.c
index b1b3a644f738..6bfce99b42a2 100644
--- a/sound/pci/ctxfi/ctatc.c
+++ b/sound/pci/ctxfi/ctatc.c
@@ -240,7 +240,7 @@ static int select_rom(unsigned int pitch)
         } else if (pitch == 0x02000000) {
                 /* pitch == 2 */
                 return 3;
-        } else if (pitch >= 0x0 && pitch <= 0x08000000) {
+        } else if (pitch <= 0x08000000) {
                 /* 0 <= pitch <= 8 */
                 return 0;
         } else {
diff --git a/sound/pci/emu10k1/emu10k1x.c b/sound/pci/emu10k1/emu10k1x.c
index 36e08bd2b3cc..6b8ae7b5cd54 100644
--- a/sound/pci/emu10k1/emu10k1x.c
+++ b/sound/pci/emu10k1/emu10k1x.c
@@ -1040,8 +1040,7 @@ static void snd_emu10k1x_proc_reg_write(struct snd_info_entry *entry,
                 if (sscanf(line, "%x %x %x", &reg, &channel_id, &val) != 3)
                         continue;
 
-                if ((reg < 0x49) && (reg >= 0) && (val <= 0xffffffff) 
-                    && (channel_id >= 0) && (channel_id <= 2) )
+                if (reg < 0x49 && val <= 0xffffffff && channel_id <= 2)
                         snd_emu10k1x_ptr_write(emu, reg, channel_id, val);
         }
 }
diff --git a/sound/pci/emu10k1/emuproc.c b/sound/pci/emu10k1/emuproc.c
index 216f9748aff5..baa7cd508cd8 100644
--- a/sound/pci/emu10k1/emuproc.c
+++ b/sound/pci/emu10k1/emuproc.c
@@ -451,7 +451,7 @@ static void snd_emu_proc_io_reg_write(struct snd_info_entry *entry,
         while (!snd_info_get_line(buffer, line, sizeof(line))) {
                 if (sscanf(line, "%x %x", &reg, &val) != 2)
                         continue;
-                if ((reg < 0x40) && (reg >= 0) && (val <= 0xffffffff) ) {
+                if (reg < 0x40 && val <= 0xffffffff) {
                         spin_lock_irqsave(&emu->emu_lock, flags);
                         outl(val, emu->port + (reg & 0xfffffffc));
                         spin_unlock_irqrestore(&emu->emu_lock, flags);
@@ -527,7 +527,7 @@ static void snd_emu_proc_ptr_reg_write(struct snd_info_entry *entry,
         while (!snd_info_get_line(buffer, line, sizeof(line))) {
                 if (sscanf(line, "%x %x %x", &reg, &channel_id, &val) != 3)
                         continue;
-                if ((reg < 0xa0) && (reg >= 0) && (val <= 0xffffffff) && (channel_id >= 0) && (channel_id <= 3) )
+                if (reg < 0xa0 && val <= 0xffffffff && channel_id <= 3)
                         snd_ptr_write(emu, iobase, reg, channel_id, val);
         }
 }
diff --git a/sound/pci/emu10k1/io.c b/sound/pci/emu10k1/io.c
index c1a5aa15af8f..5ef7080e14d0 100644
--- a/sound/pci/emu10k1/io.c
+++ b/sound/pci/emu10k1/io.c
@@ -256,7 +256,7 @@ int snd_emu1010_fpga_write(struct snd_emu10k1 * emu, u32 reg, u32 value)
         if (reg > 0x3f)
                 return 1;
         reg += 0x40; /* 0x40 upwards are registers. */
-        if (value < 0 || value > 0x3f) /* 0 to 0x3f are values */
+        if (value > 0x3f) /* 0 to 0x3f are values */
                 return 1;
         spin_lock_irqsave(&emu->emu_lock, flags);
         outl(reg, emu->port + A_IOCFG);
diff --git a/sound/soc/codecs/tlv320aic23.c b/sound/soc/codecs/tlv320aic23.c
index 0b8dcb5cd729..35606ae60868 100644
--- a/sound/soc/codecs/tlv320aic23.c
+++ b/sound/soc/codecs/tlv320aic23.c
@@ -85,7 +85,7 @@ static int tlv320aic23_write(struct snd_soc_codec *codec, unsigned int reg,
          * of data into val
          */
 
-        if ((reg < 0 || reg > 9) && (reg != 15)) {
+        if (reg > 9 && reg != 15) {
                 printk(KERN_WARNING "%s Invalid register R%u\n", __func__, reg);
                 return -1;
         }