From: Vinod Koul <vinod.koul@intel.com>
Date: Fri, 30 Oct 2015 15:04:20 +0000 (+0530)
Subject: ASoC: Intel: Skylake: Fix substream dereference before check
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c7b2a44410a1029f1cee4ad0b86588c9a0f83a6c;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

ASoC: Intel: Skylake: Fix substream dereference before check

Smatch warns that we dereferenced substream before check, so fix
this by initializing ebus after the check

sound/soc/intel/skylake/skl-pcm.c:802 skl_get_position()
        warn: variable dereferenced before check 'substream->runtime'

Reported by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jeeja KP <jeeja.kp@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---

diff --git a/sound/soc/intel/skylake/skl-pcm.c b/sound/soc/intel/skylake/skl-pcm.c
index 2517ec576ffc..e652d58bd9a9 100644
--- a/sound/soc/intel/skylake/skl-pcm.c
+++ b/sound/soc/intel/skylake/skl-pcm.c
@@ -807,7 +807,7 @@ static unsigned int skl_get_position(struct hdac_ext_stream *hstream,
 {
 	struct hdac_stream *hstr = hdac_stream(hstream);
 	struct snd_pcm_substream *substream = hstr->substream;
-	struct hdac_ext_bus *ebus = get_bus_ctx(substream);
+	struct hdac_ext_bus *ebus;
 	unsigned int pos;
 	int delay;
 
@@ -818,6 +818,7 @@ static unsigned int skl_get_position(struct hdac_ext_stream *hstream,
 		pos = 0;
 
 	if (substream->runtime) {
+		ebus = get_bus_ctx(substream);
 		delay = skl_get_delay_from_lpib(ebus, hstream, pos)
 						 + codec_delay;
 		substream->runtime->delay += delay;