[ALSA] Fix mmap_count with O_APPEND opened streams

Move mmap_count to snd_pcm_substream instead of runtime struct
so that multiplly opened substreams via O_APPEND can be handled
correctly.

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

1 files changed, 14 insertions, 13 deletions

diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c
index 9803a6ce3d46..4395285aa6a3 100644
--- a/sound/core/oss/pcm_oss.c
+++ b/sound/core/oss/pcm_oss.c
@@ -684,7 +684,7 @@ static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
         oss_buffer_size = snd_pcm_plug_client_size(substream,
                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
         oss_buffer_size = 1 << ld2(oss_buffer_size);
-        if (atomic_read(&runtime->mmap_count)) {
+        if (atomic_read(&substream->mmap_count)) {
                 if (oss_buffer_size > runtime->oss.mmap_bytes)
                         oss_buffer_size = runtime->oss.mmap_bytes;
         }
@@ -819,7 +819,7 @@ static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
                 goto failure;
         }
 
-        if (atomic_read(&runtime->mmap_count))
+        if (atomic_read(&substream->mmap_count))
                 direct = 1;
         else
                 direct = substream->oss.setup.direct;
@@ -828,7 +828,7 @@ static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
         _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
         _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
         snd_mask_none(&mask);
-        if (atomic_read(&runtime->mmap_count))
+        if (atomic_read(&substream->mmap_count))
                 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
         else {
                 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
@@ -947,7 +947,8 @@ static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
         } else {
                 sw_params->start_threshold = runtime->boundary;
         }
-        if (atomic_read(&runtime->mmap_count) || substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+        if (atomic_read(&substream->mmap_count) ||
+            substream->stream == SNDRV_PCM_STREAM_CAPTURE)
                 sw_params->stop_threshold = runtime->boundary;
         else
                 sw_params->stop_threshold = runtime->buffer_size;
@@ -957,7 +958,7 @@ static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
         sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
                 1 : runtime->period_size;
         sw_params->xfer_align = 1;
-        if (atomic_read(&runtime->mmap_count) ||
+        if (atomic_read(&substream->mmap_count) ||
             substream->oss.setup.nosilence) {
                 sw_params->silence_threshold = 0;
                 sw_params->silence_size = 0;
@@ -1301,7 +1302,7 @@ static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const cha
         ssize_t tmp;
         struct snd_pcm_runtime *runtime = substream->runtime;
 
-        if (atomic_read(&runtime->mmap_count))
+        if (atomic_read(&substream->mmap_count))
                 return -ENXIO;
 
         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
@@ -1391,7 +1392,7 @@ static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __use
         ssize_t tmp;
         struct snd_pcm_runtime *runtime = substream->runtime;
 
-        if (atomic_read(&runtime->mmap_count))
+        if (atomic_read(&substream->mmap_count))
                 return -ENXIO;
 
         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
@@ -1521,7 +1522,7 @@ static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
         if (substream != NULL) {
                 runtime = substream->runtime;
-                if (atomic_read(&runtime->mmap_count))
+                if (atomic_read(&substream->mmap_count))
                         goto __direct;
                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
                         return err;
@@ -1690,7 +1691,7 @@ static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
 
         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
                 return err;
-        if (atomic_read(&substream->runtime->mmap_count))
+        if (atomic_read(&substream->mmap_count))
                 direct = 1;
         else
                 direct = substream->oss.setup.direct;
@@ -1900,7 +1901,7 @@ static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int tr
                 if (trigger & PCM_ENABLE_OUTPUT) {
                         if (runtime->oss.trigger)
                                 goto _skip1;
-                        if (atomic_read(&psubstream->runtime->mmap_count))
+                        if (atomic_read(&psubstream->mmap_count))
                                 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
                         runtime->oss.trigger = 1;
                         runtime->start_threshold = 1;
@@ -2018,7 +2019,7 @@ static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream
         if (err < 0)
                 return err;
         info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
-        if (atomic_read(&runtime->mmap_count)) {
+        if (atomic_read(&substream->mmap_count)) {
                 snd_pcm_sframes_t n;
                 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
                 if (n < 0)
@@ -2574,7 +2575,7 @@ static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size
 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
 {
         struct snd_pcm_runtime *runtime = substream->runtime;
-        if (atomic_read(&runtime->mmap_count))
+        if (atomic_read(&substream->mmap_count))
                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
         else
                 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
@@ -2583,7 +2584,7 @@ static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
 {
         struct snd_pcm_runtime *runtime = substream->runtime;
-        if (atomic_read(&runtime->mmap_count))
+        if (atomic_read(&substream->mmap_count))
                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
         else
                 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;