ALSA: ctxfi - Clear PCM resources at hw_params and hw_free

Currently the PCM resources are allocated only once and ever in prepare
callback, assuming that the PCM parameters are never changed.  But it's
not true.

This patch adds the call of atc->pcm_release_resources() at hw_params
and hw_free callbacks to assure that the PCM setup is done correctly
for each h/w parameter changes.

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

1 files changed, 15 insertions, 1 deletions

diff --git a/sound/pci/ctxfi/ctpcm.c b/sound/pci/ctxfi/ctpcm.c
index 870fa170f046..9e5c0c4da726 100644
--- a/sound/pci/ctxfi/ctpcm.c
+++ b/sound/pci/ctxfi/ctpcm.c
@@ -176,12 +176,26 @@ static int ct_pcm_playback_close(struct snd_pcm_substream *substream)
 static int ct_pcm_hw_params(struct snd_pcm_substream *substream,
                                      struct snd_pcm_hw_params *hw_params)
 {
-        return snd_pcm_lib_malloc_pages(substream,
+        struct ct_atc *atc = snd_pcm_substream_chip(substream);
+        struct ct_atc_pcm *apcm = substream->runtime->private_data;
+        int err;
+
+        err = snd_pcm_lib_malloc_pages(substream,
                                         params_buffer_bytes(hw_params));
+        if (err < 0)
+                return err;
+        /* clear previous resources */
+        atc->pcm_release_resources(atc, apcm);
+        return err;
 }
 
 static int ct_pcm_hw_free(struct snd_pcm_substream *substream)
 {
+        struct ct_atc *atc = snd_pcm_substream_chip(substream);
+        struct ct_atc_pcm *apcm = substream->runtime->private_data;
+
+        /* clear previous resources */
+        atc->pcm_release_resources(atc, apcm);
         /* Free snd-allocated pages */
         return snd_pcm_lib_free_pages(substream);
 }