[PATCH 4.20 032/117] ASoC: atom: fix a missing check of snd_pcm_lib_malloc_pages

[Greg Kroah-Hartman]

4.20-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Kangjie Lu <k...@umn.edu>

commit 44fabd8cdaaa3acb80ad2bb3b5c61ae2136af661 upstream.

snd_pcm_lib_malloc_pages() may fail, so let's check its status and
return its error code upstream.

Signed-off-by: Kangjie Lu <k...@umn.edu>
Acked-by: Pierre-Louis Bossart <pierre-louis.boss...@linux.intel.com>
Signed-off-by: Mark Brown <broo...@kernel.org>
Cc: sta...@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 sound/soc/intel/atom/sst-mfld-platform-pcm.c |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

--- a/sound/soc/intel/atom/sst-mfld-platform-pcm.c
+++ b/sound/soc/intel/atom/sst-mfld-platform-pcm.c
@@ -399,7 +399,13 @@ static int sst_media_hw_params(struct sn
                                struct snd_pcm_hw_params *params,
                                struct snd_soc_dai *dai)
 {
-       snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
+       int ret;
+
+       ret =
+               snd_pcm_lib_malloc_pages(substream,
+                               params_buffer_bytes(params));
+       if (ret)
+               return ret;
        memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
        return 0;
 }