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From: Arnd Bergmann <arnd@arndb.de>
To: Mark Brown <broonie@kernel.org>,
	Vinod Koul <vinod.koul@intel.com>,
	Guneshwor Singh <guneshwor.o.singh@intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>,
	Liam Girdwood <lgirdwood@gmail.com>,
	Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>,
	Naveen Manohar <naveen.m@intel.com>,
	"Subhransu S. Prusty" <subhransu.s.prusty@intel.com>,
	Harsha Priya N <harshapriya.n@intel.com>,
	Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
	alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org
Subject: [PATCH] ASoC: intel: initialize return value properly
Date: Mon,  6 Nov 2017 14:30:36 +0100	[thread overview]
Message-ID: <20171106133114.339667-1-arnd@arndb.de> (raw)

When CONFIG_SND_SOC_HDAC_HDMI is disabled, we can run into an
uninitialized variable:

sound/soc/intel/skylake/skl.c: In function 'skl_resume':
sound/soc/intel/skylake/skl.c:326:6: error: 'ret' may be used uninitialized in this function [-Werror=maybe-uninitialized]

I have run into this on today's linux-next kernel, but it appears
that this is an older problem that was just hard to trigger
with randconfig builds as CONFIG_SND_SOC_HDAC_HDMI would in
effect be impossible to disable when having SND_SOC_INTEL_SKYLAKE
enabled.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 sound/soc/intel/skylake/skl.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/soc/intel/skylake/skl.c b/sound/soc/intel/skylake/skl.c
index 31d8634e8aa1..acb0ab470ca6 100644
--- a/sound/soc/intel/skylake/skl.c
+++ b/sound/soc/intel/skylake/skl.c
@@ -355,6 +355,7 @@ static int skl_resume(struct device *dev)
 
 		if (ebus->cmd_dma_state)
 			snd_hdac_bus_init_cmd_io(&ebus->bus);
+		ret = 0;
 	} else {
 		ret = _skl_resume(ebus);
 
-- 
2.9.0

WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd@arndb.de>
To: Mark Brown <broonie@kernel.org>,
	Vinod Koul <vinod.koul@intel.com>,
	Guneshwor Singh <guneshwor.o.singh@intel.com>
Cc: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
	alsa-devel@alsa-project.org, Arnd Bergmann <arnd@arndb.de>,
	Harsha Priya N <harshapriya.n@intel.com>,
	linux-kernel@vger.kernel.org, Takashi Iwai <tiwai@suse.com>,
	Liam Girdwood <lgirdwood@gmail.com>,
	Naveen Manohar <naveen.m@intel.com>,
	"Subhransu S. Prusty" <subhransu.s.prusty@intel.com>
Subject: [PATCH] ASoC: intel: initialize return value properly
Date: Mon,  6 Nov 2017 14:30:36 +0100	[thread overview]
Message-ID: <20171106133114.339667-1-arnd@arndb.de> (raw)

When CONFIG_SND_SOC_HDAC_HDMI is disabled, we can run into an
uninitialized variable:

sound/soc/intel/skylake/skl.c: In function 'skl_resume':
sound/soc/intel/skylake/skl.c:326:6: error: 'ret' may be used uninitialized in this function [-Werror=maybe-uninitialized]

I have run into this on today's linux-next kernel, but it appears
that this is an older problem that was just hard to trigger
with randconfig builds as CONFIG_SND_SOC_HDAC_HDMI would in
effect be impossible to disable when having SND_SOC_INTEL_SKYLAKE
enabled.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 sound/soc/intel/skylake/skl.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/soc/intel/skylake/skl.c b/sound/soc/intel/skylake/skl.c
index 31d8634e8aa1..acb0ab470ca6 100644
--- a/sound/soc/intel/skylake/skl.c
+++ b/sound/soc/intel/skylake/skl.c
@@ -355,6 +355,7 @@ static int skl_resume(struct device *dev)
 
 		if (ebus->cmd_dma_state)
 			snd_hdac_bus_init_cmd_io(&ebus->bus);
+		ret = 0;
 	} else {
 		ret = _skl_resume(ebus);
 
-- 
2.9.0

             reply	other threads:[~2017-11-06 13:32 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-11-06 13:30 Arnd Bergmann [this message]
2017-11-06 13:30 ` [PATCH] ASoC: intel: initialize return value properly Arnd Bergmann
2017-11-07  3:56 ` Vinod Koul
2017-11-16 19:28 ` Applied "ASoC: intel: initialize return value properly" to the asoc tree Mark Brown
2017-11-16 19:28   ` Mark Brown

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