[alsa-devel] [PATCH] ALSA - hda: hdmi check NULL pointer in hdmi_set_chmap

From: Libin Yang libin.yang@linux.intel.com

Make sure per_pin is not NULL before using it.

Signed-off-by: Libin Yang libin.yang@linux.intel.com --- sound/pci/hda/patch_hdmi.c | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index 4833c7b..c99289d 100644 --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -1858,6 +1858,8 @@ static void hdmi_set_chmap(struct hdac_device *hdac, int pcm_idx, struct hdmi_spec *spec = codec->spec; struct hdmi_spec_per_pin *per_pin = pcm_idx_to_pin(spec, pcm_idx);

+ if (!per_pin) + return; mutex_lock(&per_pin->lock); per_pin->chmap_set = true; memcpy(per_pin->chmap, chmap, ARRAY_SIZE(per_pin->chmap));