5 files changed, 121 insertions, 195 deletions

diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index 4e18a6dbe690..fe1b131842be 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -271,7 +271,6 @@ struct snd_pcm_runtime {
         int overrange;
         snd_pcm_uframes_t avail_max;
         snd_pcm_uframes_t hw_ptr_base;  /* Position at buffer restart */
-        snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */
         unsigned long hw_ptr_jiffies;   /* Time when hw_ptr is updated */
         snd_pcm_sframes_t delay;        /* extra delay; typically FIFO size */
 
diff --git a/include/sound/pcm_oss.h b/include/sound/pcm_oss.h
index cc4e226f35fd..760c969d885d 100644
--- a/include/sound/pcm_oss.h
+++ b/include/sound/pcm_oss.h
@@ -61,7 +61,7 @@ struct snd_pcm_oss_runtime {
         struct snd_pcm_plugin *plugin_first;
         struct snd_pcm_plugin *plugin_last;
 #endif
-        unsigned int prev_hw_ptr_interrupt;
+        unsigned int prev_hw_ptr_period;
 };
 
 struct snd_pcm_oss_file {
diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c
index d9c96353121a..255ad910077a 100644
--- a/sound/core/oss/pcm_oss.c
+++ b/sound/core/oss/pcm_oss.c
@@ -632,6 +632,13 @@ static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
         return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
 }
 
+static inline
+snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
+{
+        snd_pcm_uframes_t ptr = runtime->status->hw_ptr;
+        return ptr - (ptr % runtime->period_size);
+}
+
 /* define extended formats in the recent OSS versions (if any) */
 /* linear formats */
 #define AFMT_S32_LE      0x00001000
@@ -1102,7 +1109,7 @@ static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
                 return err;
         }
         runtime->oss.prepare = 0;
-        runtime->oss.prev_hw_ptr_interrupt = 0;
+        runtime->oss.prev_hw_ptr_period = 0;
         runtime->oss.period_ptr = 0;
         runtime->oss.buffer_used = 0;
 
@@ -1950,7 +1957,8 @@ static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
         return result;
 }
 
-static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, snd_pcm_uframes_t hw_ptr)
+static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
+                                      snd_pcm_uframes_t hw_ptr)
 {
         struct snd_pcm_runtime *runtime = substream->runtime;
         snd_pcm_uframes_t appl_ptr;
@@ -1986,7 +1994,8 @@ static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int tr
                         if (runtime->oss.trigger)
                                 goto _skip1;
                         if (atomic_read(&psubstream->mmap_count))
-                                snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
+                                snd_pcm_oss_simulate_fill(psubstream,
+                                                get_hw_ptr_period(runtime));
                         runtime->oss.trigger = 1;
                         runtime->start_threshold = 1;
                         cmd = SNDRV_PCM_IOCTL_START;
@@ -2105,11 +2114,12 @@ static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream
         info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
         if (atomic_read(&substream->mmap_count)) {
                 snd_pcm_sframes_t n;
-                n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
+                delay = get_hw_ptr_period(runtime);
+                n = delay - runtime->oss.prev_hw_ptr_period;
                 if (n < 0)
                         n += runtime->boundary;
                 info.blocks = n / runtime->period_size;
-                runtime->oss.prev_hw_ptr_interrupt = delay;
+                runtime->oss.prev_hw_ptr_period = delay;
                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
                         snd_pcm_oss_simulate_fill(substream, delay);
                 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
@@ -2673,18 +2683,22 @@ static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
 {
         struct snd_pcm_runtime *runtime = substream->runtime;
         if (atomic_read(&substream->mmap_count))
-                return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
+                return runtime->oss.prev_hw_ptr_period !=
+                                                get_hw_ptr_period(runtime);
         else
-                return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
+                return snd_pcm_playback_avail(runtime) >=
+                                                runtime->oss.period_frames;
 }
 
 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
 {
         struct snd_pcm_runtime *runtime = substream->runtime;
         if (atomic_read(&substream->mmap_count))
-                return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
+                return runtime->oss.prev_hw_ptr_period !=
+                                                get_hw_ptr_period(runtime);
         else
-                return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
+                return snd_pcm_capture_avail(runtime) >=
+                                                runtime->oss.period_frames;
 }
 
 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c
index 1990afb8a735..70a4f7428d78 100644
--- a/sound/core/pcm_lib.c
+++ b/sound/core/pcm_lib.c
@@ -172,6 +172,7 @@ static void xrun(struct snd_pcm_substream *substream)
 #define hw_ptr_error(substream, fmt, args...)                           \
         do {                                                            \
                 if (xrun_debug(substream, XRUN_DEBUG_BASIC)) {          \
+                        xrun_log_show(substream);                       \
                         if (printk_ratelimit()) {                       \
                                 snd_printd("PCM: " fmt, ##args);        \
                         }                                               \
@@ -188,7 +189,6 @@ struct hwptr_log_entry {
         snd_pcm_uframes_t buffer_size;
         snd_pcm_uframes_t old_hw_ptr;
         snd_pcm_uframes_t hw_ptr_base;
-        snd_pcm_uframes_t hw_ptr_interrupt;
 };
 
 struct snd_pcm_hwptr_log {
@@ -220,7 +220,6 @@ static void xrun_log(struct snd_pcm_substream *substream,
         entry->buffer_size = runtime->buffer_size;;
         entry->old_hw_ptr = runtime->status->hw_ptr;
         entry->hw_ptr_base = runtime->hw_ptr_base;
-        entry->hw_ptr_interrupt = runtime->hw_ptr_interrupt;;
         log->idx = (log->idx + 1) % XRUN_LOG_CNT;
 }
 
@@ -241,14 +240,13 @@ static void xrun_log_show(struct snd_pcm_substream *substream)
                 entry = &log->entries[idx];
                 if (entry->period_size == 0)
                         break;
-                snd_printd("hwptr log: %s: j=%lu, pos=0x%lx/0x%lx/0x%lx, "
-                           "hwptr=0x%lx, hw_base=0x%lx, hw_intr=0x%lx\n",
+                snd_printd("hwptr log: %s: j=%lu, pos=%ld/%ld/%ld, "
+                           "hwptr=%ld/%ld\n",
                            name, entry->jiffies, (unsigned long)entry->pos,
                            (unsigned long)entry->period_size,
                            (unsigned long)entry->buffer_size,
                            (unsigned long)entry->old_hw_ptr,
-                           (unsigned long)entry->hw_ptr_base,
-                           (unsigned long)entry->hw_ptr_interrupt);
+                           (unsigned long)entry->hw_ptr_base);
                 idx++;
                 idx %= XRUN_LOG_CNT;
         }
@@ -265,33 +263,6 @@ static void xrun_log_show(struct snd_pcm_substream *substream)
 
 #endif
 
-static snd_pcm_uframes_t
-snd_pcm_update_hw_ptr_pos(struct snd_pcm_substream *substream,
-                          struct snd_pcm_runtime *runtime)
-{
-        snd_pcm_uframes_t pos;
-
-        pos = substream->ops->pointer(substream);
-        if (pos == SNDRV_PCM_POS_XRUN)
-                return pos; /* XRUN */
-        if (pos >= runtime->buffer_size) {
-                if (printk_ratelimit()) {
-                        char name[16];
-                        pcm_debug_name(substream, name, sizeof(name));
-                        xrun_log_show(substream);
-                        snd_printd(KERN_ERR  "BUG: %s, pos = 0x%lx, "
-                                   "buffer size = 0x%lx, period size = 0x%lx\n",
-                                   name, pos, runtime->buffer_size,
-                                   runtime->period_size);
-                }
-                pos = 0;
-        }
-        pos -= pos % runtime->min_align;
-        if (xrun_debug(substream, XRUN_DEBUG_LOG))
-                xrun_log(substream, pos);
-        return pos;
-}
-
 static int snd_pcm_update_hw_ptr_post(struct snd_pcm_substream *substream,
                                       struct snd_pcm_runtime *runtime)
 {
@@ -319,72 +290,88 @@ static int snd_pcm_update_hw_ptr_post(struct snd_pcm_substream *substream,
         return 0;
 }
 
-static int snd_pcm_update_hw_ptr_interrupt(struct snd_pcm_substream *substream)
+static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream,
+                                  unsigned int in_interrupt)
 {
         struct snd_pcm_runtime *runtime = substream->runtime;
         snd_pcm_uframes_t pos;
-        snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_ptr_interrupt, hw_base;
+        snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_base;
         snd_pcm_sframes_t hdelta, delta;
         unsigned long jdelta;
 
         old_hw_ptr = runtime->status->hw_ptr;
-        pos = snd_pcm_update_hw_ptr_pos(substream, runtime);
+        pos = substream->ops->pointer(substream);
         if (pos == SNDRV_PCM_POS_XRUN) {
                 xrun(substream);
                 return -EPIPE;
         }
-        if (xrun_debug(substream, XRUN_DEBUG_PERIODUPDATE)) {
-                char name[16];
-                pcm_debug_name(substream, name, sizeof(name));
-                snd_printd("period_update: %s: pos=0x%x/0x%x/0x%x, "
-                           "hwptr=0x%lx, hw_base=0x%lx, hw_intr=0x%lx\n",
-                           name, (unsigned int)pos,
-                           (unsigned int)runtime->period_size,
-                           (unsigned int)runtime->buffer_size,
-                           (unsigned long)old_hw_ptr,
-                           (unsigned long)runtime->hw_ptr_base,
-                           (unsigned long)runtime->hw_ptr_interrupt);
+        if (pos >= runtime->buffer_size) {
+                if (printk_ratelimit()) {
+                        char name[16];
+                        pcm_debug_name(substream, name, sizeof(name));
+                        xrun_log_show(substream);
+                        snd_printd(KERN_ERR  "BUG: %s, pos = %ld, "
+                                   "buffer size = %ld, period size = %ld\n",
+                                   name, pos, runtime->buffer_size,
+                                   runtime->period_size);
+                }
+                pos = 0;
         }
+        pos -= pos % runtime->min_align;
+        if (xrun_debug(substream, XRUN_DEBUG_LOG))
+                xrun_log(substream, pos);
         hw_base = runtime->hw_ptr_base;
         new_hw_ptr = hw_base + pos;
-        hw_ptr_interrupt = runtime->hw_ptr_interrupt + runtime->period_size;
-        delta = new_hw_ptr - hw_ptr_interrupt;
-        if (hw_ptr_interrupt >= runtime->boundary) {
-                hw_ptr_interrupt -= runtime->boundary;
-                if (hw_base < runtime->boundary / 2)
-                        /* hw_base was already lapped; recalc delta */
-                        delta = new_hw_ptr - hw_ptr_interrupt;
-        }
-        if (delta < 0) {
-                if (runtime->periods == 1 || new_hw_ptr < old_hw_ptr)
-                        delta += runtime->buffer_size;
-                if (delta < 0) {
-                        xrun_log_show(substream);
-                        hw_ptr_error(substream, 
-                                     "Unexpected hw_pointer value "
-                                     "(stream=%i, pos=%ld, intr_ptr=%ld)\n",
-                                     substream->stream, (long)pos,
-                                     (long)hw_ptr_interrupt);
-#if 1
-                        /* simply skipping the hwptr update seems more
-                         * robust in some cases, e.g. on VMware with
-                         * inaccurate timer source
-                         */
-                        return 0; /* skip this update */
-#else
-                        /* rebase to interrupt position */
-                        hw_base = new_hw_ptr = hw_ptr_interrupt;
-                        /* align hw_base to buffer_size */
-                        hw_base -= hw_base % runtime->buffer_size;
-                        delta = 0;
-#endif
-                } else {
+        if (in_interrupt) {
+                /* we know that one period was processed */
+                /* delta = "expected next hw_ptr" for in_interrupt != 0 */
+                delta = old_hw_ptr - (old_hw_ptr % runtime->period_size)
+                        + runtime->period_size;
+                if (delta > new_hw_ptr) {
                         hw_base += runtime->buffer_size;
                         if (hw_base >= runtime->boundary)
                                 hw_base = 0;
                         new_hw_ptr = hw_base + pos;
+                        goto __delta;
                 }
         }
+        /* new_hw_ptr might be lower than old_hw_ptr in case when */
+        /* pointer crosses the end of the ring buffer */
+        if (new_hw_ptr < old_hw_ptr) {
+                hw_base += runtime->buffer_size;
+                if (hw_base >= runtime->boundary)
+                        hw_base = 0;
+                new_hw_ptr = hw_base + pos;
+        }
+      __delta:
+        delta = (new_hw_ptr - old_hw_ptr) % runtime->boundary;
+        if (xrun_debug(substream, in_interrupt ?
+                        XRUN_DEBUG_PERIODUPDATE : XRUN_DEBUG_HWPTRUPDATE)) {
+                char name[16];
+                pcm_debug_name(substream, name, sizeof(name));
+                snd_printd("%s_update: %s: pos=%u/%u/%u, "
+                           "hwptr=%ld/%ld/%ld/%ld\n",
+                           in_interrupt ? "period" : "hwptr",
+                           name,
+                           (unsigned int)pos,
+                           (unsigned int)runtime->period_size,
+                           (unsigned int)runtime->buffer_size,
+                           (unsigned long)delta,
+                           (unsigned long)old_hw_ptr,
+                           (unsigned long)new_hw_ptr,
+                           (unsigned long)runtime->hw_ptr_base);
+        }
+        /* something must be really wrong */
+        if (delta >= runtime->buffer_size) {
+                hw_ptr_error(substream,
+                               "Unexpected hw_pointer value %s"
+                               "(stream=%i, pos=%ld, new_hw_ptr=%ld, "
+                               "old_hw_ptr=%ld)\n",
+                                     in_interrupt ? "[Q] " : "[P]",
+                                     substream->stream, (long)pos,
+                                     (long)new_hw_ptr, (long)old_hw_ptr);
+                return 0;
+        }
 
         /* Do jiffies check only in xrun_debug mode */
         if (!xrun_debug(substream, XRUN_DEBUG_JIFFIESCHECK))
@@ -396,7 +383,7 @@ static int snd_pcm_update_hw_ptr_interrupt(struct snd_pcm_substream *substream)
          */
         if (runtime->hw.info & SNDRV_PCM_INFO_BATCH)
                 goto no_jiffies_check;
-        hdelta = new_hw_ptr - old_hw_ptr;
+        hdelta = delta;
         if (hdelta < runtime->delay)
                 goto no_jiffies_check;
         hdelta -= runtime->delay;
@@ -405,45 +392,49 @@ static int snd_pcm_update_hw_ptr_interrupt(struct snd_pcm_substream *substream)
                 delta = jdelta /
                         (((runtime->period_size * HZ) / runtime->rate)
                                                                 + HZ/100);
-                xrun_log_show(substream);
+                /* move new_hw_ptr according jiffies not pos variable */
+                new_hw_ptr = old_hw_ptr;
+                /* use loop to avoid checks for delta overflows */
+                /* the delta value is small or zero in most cases */
+                while (delta > 0) {
+                        new_hw_ptr += runtime->period_size;
+                        if (new_hw_ptr >= runtime->boundary)
+                                new_hw_ptr -= runtime->boundary;
+                        delta--;
+                }
+                /* align hw_base to buffer_size */
+                hw_base = new_hw_ptr - (new_hw_ptr % runtime->buffer_size);
+                delta = 0;
                 hw_ptr_error(substream,
-                             "hw_ptr skipping! [Q] "
+                             "hw_ptr skipping! %s"
                              "(pos=%ld, delta=%ld, period=%ld, "
-                             "jdelta=%lu/%lu/%lu)\n",
+                             "jdelta=%lu/%lu/%lu, hw_ptr=%ld/%ld)\n",
+                             in_interrupt ? "[Q] " : "",
                              (long)pos, (long)hdelta,
                              (long)runtime->period_size, jdelta,
-                             ((hdelta * HZ) / runtime->rate), delta);
-                hw_ptr_interrupt = runtime->hw_ptr_interrupt +
-                                   runtime->period_size * delta;
-                if (hw_ptr_interrupt >= runtime->boundary)
-                        hw_ptr_interrupt -= runtime->boundary;
-                /* rebase to interrupt position */
-                hw_base = new_hw_ptr = hw_ptr_interrupt;
-                /* align hw_base to buffer_size */
-                hw_base -= hw_base % runtime->buffer_size;
-                delta = 0;
+                             ((hdelta * HZ) / runtime->rate), delta,
+                             (unsigned long)old_hw_ptr,
+                             (unsigned long)new_hw_ptr);
         }
  no_jiffies_check:
         if (delta > runtime->period_size + runtime->period_size / 2) {
-                xrun_log_show(substream);
                 hw_ptr_error(substream,
-                             "Lost interrupts? "
-                             "(stream=%i, delta=%ld, intr_ptr=%ld)\n",
+                             "Lost interrupts? %s"
+                             "(stream=%i, delta=%ld, new_hw_ptr=%ld, "
+                             "old_hw_ptr=%ld)\n",
+                             in_interrupt ? "[Q] " : "",
                              substream->stream, (long)delta,
-                             (long)hw_ptr_interrupt);
-                /* rebase hw_ptr_interrupt */
-                hw_ptr_interrupt =
-                        new_hw_ptr - new_hw_ptr % runtime->period_size;
+                             (long)new_hw_ptr,
+                             (long)old_hw_ptr);
         }
-        runtime->hw_ptr_interrupt = hw_ptr_interrupt;
+
+        if (runtime->status->hw_ptr == new_hw_ptr)
+                return 0;
 
         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
             runtime->silence_size > 0)
                 snd_pcm_playback_silence(substream, new_hw_ptr);
 
-        if (runtime->status->hw_ptr == new_hw_ptr)
-                return 0;
-
         runtime->hw_ptr_base = hw_base;
         runtime->status->hw_ptr = new_hw_ptr;
         runtime->hw_ptr_jiffies = jiffies;
@@ -456,83 +447,7 @@ static int snd_pcm_update_hw_ptr_interrupt(struct snd_pcm_substream *substream)
 /* CAUTION: call it with irq disabled */
 int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream)
 {
-        struct snd_pcm_runtime *runtime = substream->runtime;
-        snd_pcm_uframes_t pos;
-        snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_base;
-        snd_pcm_sframes_t delta;
-        unsigned long jdelta;
-
-        old_hw_ptr = runtime->status->hw_ptr;
-        pos = snd_pcm_update_hw_ptr_pos(substream, runtime);
-        if (pos == SNDRV_PCM_POS_XRUN) {
-                xrun(substream);
-                return -EPIPE;
-        }
-        if (xrun_debug(substream, XRUN_DEBUG_HWPTRUPDATE)) {
-                char name[16];
-                pcm_debug_name(substream, name, sizeof(name));
-                snd_printd("hw_update: %s: pos=0x%x/0x%x/0x%x, "
-                           "hwptr=0x%lx, hw_base=0x%lx, hw_intr=0x%lx\n",
-                           name, (unsigned int)pos,
-                           (unsigned int)runtime->period_size,
-                           (unsigned int)runtime->buffer_size,
-                           (unsigned long)old_hw_ptr,
-                           (unsigned long)runtime->hw_ptr_base,
-                           (unsigned long)runtime->hw_ptr_interrupt);
-        }
-
-        hw_base = runtime->hw_ptr_base;
-        new_hw_ptr = hw_base + pos;
-
-        delta = new_hw_ptr - old_hw_ptr;
-        jdelta = jiffies - runtime->hw_ptr_jiffies;
-        if (delta < 0) {
-                delta += runtime->buffer_size;
-                if (delta < 0) {
-                        xrun_log_show(substream);
-                        hw_ptr_error(substream, 
-                                     "Unexpected hw_pointer value [2] "
-                                     "(stream=%i, pos=%ld, old_ptr=%ld, jdelta=%li)\n",
-                                     substream->stream, (long)pos,
-                                     (long)old_hw_ptr, jdelta);
-                        return 0;
-                }
-                hw_base += runtime->buffer_size;
-                if (hw_base >= runtime->boundary)
-                        hw_base = 0;
-                new_hw_ptr = hw_base + pos;
-        }
-        /* Do jiffies check only in xrun_debug mode */
-        if (!xrun_debug(substream, XRUN_DEBUG_JIFFIESCHECK))
-                goto no_jiffies_check;
-        if (delta < runtime->delay)
-                goto no_jiffies_check;
-        delta -= runtime->delay;
-        if (((delta * HZ) / runtime->rate) > jdelta + HZ/100) {
-                xrun_log_show(substream);
-                hw_ptr_error(substream,
-                             "hw_ptr skipping! "
-                             "(pos=%ld, delta=%ld, period=%ld, jdelta=%lu/%lu)\n",
-                             (long)pos, (long)delta,
-                             (long)runtime->period_size, jdelta,
-                             ((delta * HZ) / runtime->rate));
-                return 0;
-        }
- no_jiffies_check:
-        if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
-            runtime->silence_size > 0)
-                snd_pcm_playback_silence(substream, new_hw_ptr);
-
-        if (runtime->status->hw_ptr == new_hw_ptr)
-                return 0;
-
-        runtime->hw_ptr_base = hw_base;
-        runtime->status->hw_ptr = new_hw_ptr;
-        runtime->hw_ptr_jiffies = jiffies;
-        if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE)
-                snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp);
-
-        return snd_pcm_update_hw_ptr_post(substream, runtime);
+        return snd_pcm_update_hw_ptr0(substream, 0);
 }
 
 /**
@@ -1744,7 +1659,7 @@ void snd_pcm_period_elapsed(struct snd_pcm_substream *substream)
 
         snd_pcm_stream_lock_irqsave(substream, flags);
         if (!snd_pcm_running(substream) ||
-            snd_pcm_update_hw_ptr_interrupt(substream) < 0)
+            snd_pcm_update_hw_ptr0(substream, 1) < 0)
                 goto _end;
 
         if (substream->timer_running)
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 29ab46a12e11..8e777f71717c 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -1247,8 +1247,6 @@ static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
         if (err < 0)
                 return err;
         runtime->hw_ptr_base = 0;
-        runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
-                runtime->status->hw_ptr % runtime->period_size;
         runtime->silence_start = runtime->status->hw_ptr;
         runtime->silence_filled = 0;
         return 0;