4 files changed, 11 insertions, 37 deletions

diff --git a/sound/drivers/pcsp/pcsp.c b/sound/drivers/pcsp/pcsp.c
index 54a1f9036c66..1899cf0685bc 100644
--- a/sound/drivers/pcsp/pcsp.c
+++ b/sound/drivers/pcsp/pcsp.c
@@ -96,7 +96,7 @@ static int __devinit snd_card_pcsp_probe(int devnum, struct device *dev)
                 return -EINVAL;
 
         hrtimer_init(&pcsp_chip.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
-        pcsp_chip.timer.cb_mode = HRTIMER_CB_IRQSAFE;
+        pcsp_chip.timer.cb_mode = HRTIMER_CB_SOFTIRQ;
         pcsp_chip.timer.function = pcsp_do_timer;
 
         card = snd_card_new(index, id, THIS_MODULE, 0);
diff --git a/sound/drivers/pcsp/pcsp.h b/sound/drivers/pcsp/pcsp.h
index f07cc1ee1fe7..1d661f795e8c 100644
--- a/sound/drivers/pcsp/pcsp.h
+++ b/sound/drivers/pcsp/pcsp.h
@@ -24,7 +24,8 @@ static DEFINE_SPINLOCK(i8253_lock);
 /* default timer freq for PC-Speaker: 18643 Hz */
 #define DIV_18KHZ 64
 #define MAX_DIV DIV_18KHZ
-#define CUR_DIV() (MAX_DIV >> chip->treble)
+#define CALC_DIV(d) (MAX_DIV >> (d))
+#define CUR_DIV() CALC_DIV(chip->treble)
 #define PCSP_MAX_TREBLE 1
 
 /* unfortunately, with hrtimers 37KHz does not work very well :( */
@@ -36,7 +37,8 @@ static DEFINE_SPINLOCK(i8253_lock);
 #define PCSP_DEFAULT_SDIV (DIV_18KHZ >> 1)
 #define PCSP_DEFAULT_SRATE (PIT_TICK_RATE / PCSP_DEFAULT_SDIV)
 #define PCSP_INDEX_INC() (1 << (PCSP_MAX_TREBLE - chip->treble))
-#define PCSP_RATE() (PIT_TICK_RATE / CUR_DIV())
+#define PCSP_CALC_RATE(i) (PIT_TICK_RATE / CALC_DIV(i))
+#define PCSP_RATE() PCSP_CALC_RATE(chip->treble)
 #define PCSP_MIN_RATE__1 MAX_DIV/PIT_TICK_RATE
 #define PCSP_MAX_RATE__1 MIN_DIV/PIT_TICK_RATE
 #define PCSP_MAX_PERIOD_NS (1000000000ULL * PCSP_MIN_RATE__1)
diff --git a/sound/drivers/pcsp/pcsp_lib.c b/sound/drivers/pcsp/pcsp_lib.c
index 7ad4a1534b2b..e341f3f83b6a 100644
--- a/sound/drivers/pcsp/pcsp_lib.c
+++ b/sound/drivers/pcsp/pcsp_lib.c
@@ -9,7 +9,6 @@
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <sound/pcm.h>
-#include <linux/interrupt.h>
 #include <asm/io.h>
 #include "pcsp.h"
 
@@ -20,34 +19,8 @@ MODULE_PARM_DESC(nforce_wa, "Apply NForce chipset workaround "
 
 #define DMIX_WANTS_S16  1
 
-static void pcsp_start_timer(unsigned long dummy)
-{
-        hrtimer_start(&pcsp_chip.timer, ktime_set(0, 0), HRTIMER_MODE_REL);
-}
-
-/*
- * We need the hrtimer_start as a tasklet to avoid
- * the nasty locking problem. :(
- * The problem:
- * - The timer handler is called with the cpu_base->lock
- *   already held by hrtimer code.
- * - snd_pcm_period_elapsed() takes the
- *   substream->self_group.lock.
- * So far so good.
- * But the snd_pcsp_trigger() is called with the
- * substream->self_group.lock held, and it calls
- * hrtimer_start(), which takes the cpu_base->lock.
- * You see the problem. We have the code pathes
- * which take two locks in a reverse order. This
- * can deadlock and the lock validator complains.
- * The only solution I could find was to move the
- * hrtimer_start() into a tasklet. -stsp
- */
-static DECLARE_TASKLET(pcsp_start_timer_tasklet, pcsp_start_timer, 0);
-
 enum hrtimer_restart pcsp_do_timer(struct hrtimer *handle)
 {
-        unsigned long flags;
         unsigned char timer_cnt, val;
         int fmt_size, periods_elapsed;
         u64 ns;
@@ -66,9 +39,7 @@ enum hrtimer_restart pcsp_do_timer(struct hrtimer *handle)
                 return HRTIMER_RESTART;
         }
 
-        /* hrtimer calls us from both hardirq and softirq contexts,
-         * so irqsave :( */
-        spin_lock_irqsave(&chip->substream_lock, flags);
+        spin_lock_irq(&chip->substream_lock);
         /* Takashi Iwai says regarding this extra lock:
 
         If the irq handler handles some data on the DMA buffer, it should
@@ -139,7 +110,7 @@ enum hrtimer_restart pcsp_do_timer(struct hrtimer *handle)
                 chip->period_ptr %= buffer_bytes;
         }
 
-        spin_unlock_irqrestore(&chip->substream_lock, flags);
+        spin_unlock_irq(&chip->substream_lock);
 
         if (!atomic_read(&chip->timer_active))
                 return HRTIMER_NORESTART;
@@ -153,7 +124,7 @@ enum hrtimer_restart pcsp_do_timer(struct hrtimer *handle)
 exit_nr_unlock2:
         snd_pcm_stream_unlock(substream);
 exit_nr_unlock1:
-        spin_unlock_irqrestore(&chip->substream_lock, flags);
+        spin_unlock_irq(&chip->substream_lock);
         return HRTIMER_NORESTART;
 }
 
@@ -174,7 +145,7 @@ static void pcsp_start_playing(struct snd_pcsp *chip)
         atomic_set(&chip->timer_active, 1);
         chip->thalf = 0;
 
-        tasklet_schedule(&pcsp_start_timer_tasklet);
+        hrtimer_start(&pcsp_chip.timer, ktime_set(0, 0), HRTIMER_MODE_REL);
 }
 
 static void pcsp_stop_playing(struct snd_pcsp *chip)
diff --git a/sound/drivers/pcsp/pcsp_mixer.c b/sound/drivers/pcsp/pcsp_mixer.c
index 64a695fef74e..caeb0f57fcca 100644
--- a/sound/drivers/pcsp/pcsp_mixer.c
+++ b/sound/drivers/pcsp/pcsp_mixer.c
@@ -50,7 +50,8 @@ static int pcsp_treble_info(struct snd_kcontrol *kcontrol,
         uinfo->value.enumerated.items = chip->max_treble + 1;
         if (uinfo->value.enumerated.item > chip->max_treble)
                 uinfo->value.enumerated.item = chip->max_treble;
-        sprintf(uinfo->value.enumerated.name, "%d", PCSP_RATE());
+        sprintf(uinfo->value.enumerated.name, "%d",
+                        PCSP_CALC_RATE(uinfo->value.enumerated.item));
         return 0;
 }