* Re: [PATCH][next] ASoC: rt-sdw-common: Fix bit-wise or'ing of values into uninitialized variable ret
2024-10-08 17:04 ` Mark Brown
@ 2024-10-08 18:28 ` Dan Carpenter
2024-10-09 2:16 ` Jack Yu
1 sibling, 0 replies; 4+ messages in thread
From: Dan Carpenter @ 2024-10-08 18:28 UTC (permalink / raw)
To: Mark Brown
Cc: Colin Ian King, Oder Chiou, Liam Girdwood, Jaroslav Kysela,
Takashi Iwai, Jack Yu, linux-sound, kernel-janitors, linux-kernel
On Tue, Oct 08, 2024 at 06:04:08PM +0100, Mark Brown wrote:
> On Tue, Oct 08, 2024 at 05:47:07PM +0100, Colin Ian King wrote:
> > There are a handful of bit-wise or'ing of values into the uninitialized
> > variable ret resulting in garbage results. Fix this by ininitializing
> > ret to zero.
>
> I'm very disappinted in the compiler for not noticing this :(
We disabled GCC's uninitialized variable check years ago before we enabled
-Werror. Clang does catch this.
CC sound/soc/codecs/rt-sdw-common.o
sound/soc/codecs/rt-sdw-common.c:119:3: warning: variable 'ret' is uninitialized when used here [-Wuninitialized]
ret |= SND_JACK_BTN_2;
^~~
sound/soc/codecs/rt-sdw-common.c:111:9: note: initialize the variable 'ret' to silence this warning
int ret;
^
= 0
regards,
dan carpenter
^ permalink raw reply [flat|nested] 4+ messages in thread* RE: [PATCH][next] ASoC: rt-sdw-common: Fix bit-wise or'ing of values into uninitialized variable ret
2024-10-08 17:04 ` Mark Brown
2024-10-08 18:28 ` Dan Carpenter
@ 2024-10-09 2:16 ` Jack Yu
1 sibling, 0 replies; 4+ messages in thread
From: Jack Yu @ 2024-10-09 2:16 UTC (permalink / raw)
To: Mark Brown, Colin Ian King
Cc: Oder Chiou, Liam Girdwood, Jaroslav Kysela, Takashi Iwai,
linux-sound@vger.kernel.org, kernel-janitors@vger.kernel.org,
linux-kernel@vger.kernel.org
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> -----Original Message-----
> From: Mark Brown <broonie@kernel.org>
> Sent: Wednesday, October 9, 2024 1:04 AM
> To: Colin Ian King <colin.i.king@gmail.com>
> Cc: Oder Chiou <oder_chiou@realtek.com>; Liam Girdwood
> <lgirdwood@gmail.com>; Jaroslav Kysela <perex@perex.cz>; Takashi Iwai
> <tiwai@suse.com>; Jack Yu <jack.yu@realtek.com>;
> linux-sound@vger.kernel.org; kernel-janitors@vger.kernel.org;
> linux-kernel@vger.kernel.org
> Subject: Re: [PATCH][next] ASoC: rt-sdw-common: Fix bit-wise or'ing of values
> into uninitialized variable ret
>
> On Tue, Oct 08, 2024 at 05:47:07PM +0100, Colin Ian King wrote:
> > There are a handful of bit-wise or'ing of values into the
> > uninitialized variable ret resulting in garbage results. Fix this by
> > ininitializing ret to zero.
>
> I'm very disappinted in the compiler for not noticing this :(
I'm sorry for such mistake. I've sent a patch to fix this yesterday, please refer attachment.
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From: Jack Yu <jack.yu@realtek.com>
To: "broonie@kernel.org" <broonie@kernel.org>, "lgirdwood@gmail.com" <lgirdwood@gmail.com>
Cc: "alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>, "lars@metafoo.de" <lars@metafoo.de>, "bard.liao@intel.com" <bard.liao@intel.com>, "naveen.m@intel.com" <naveen.m@intel.com>, "Flove(HsinFu)" <flove@realtek.com>, "Oder Chiou" <oder_chiou@realtek.com>, "Shuming [范書銘]" <shumingf@realtek.com>, "Derek [方德義]" <derek.fang@realtek.com>, "Jack Yu" <jack.yu@realtek.com>
Subject: [PATCH 2/2] ASoC: rt721-sdca: Fix issue of warning message
Date: Tue, 8 Oct 2024 08:57:35 +0000
Fix issue of warning messages caused by some variables.
Signed-off-by: Jack Yu <jack.yu@realtek.com>
---
sound/soc/codecs/rt-sdw-common.c | 2 +-
sound/soc/codecs/rt721-sdca.c | 4 ++--
2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/sound/soc/codecs/rt-sdw-common.c b/sound/soc/codecs/rt-sdw-common.c
index 9ed0e9855699..a422da6cf702 100644
--- a/sound/soc/codecs/rt-sdw-common.c
+++ b/sound/soc/codecs/rt-sdw-common.c
@@ -108,7 +108,7 @@ EXPORT_SYMBOL_GPL(rt_sdca_index_update_bits);
int rt_sdca_btn_type(unsigned char *buffer)
{
u8 btn_type = 0;
- int ret;
+ int ret = 0;
btn_type |= buffer[0] & 0xf;
btn_type |= (buffer[0] >> 4) & 0xf;
diff --git a/sound/soc/codecs/rt721-sdca.c b/sound/soc/codecs/rt721-sdca.c
index 36056cb7a3ca..201cb667c8c1 100644
--- a/sound/soc/codecs/rt721-sdca.c
+++ b/sound/soc/codecs/rt721-sdca.c
@@ -30,7 +30,7 @@ static void rt721_sdca_jack_detect_handler(struct work_struct *work)
{
struct rt721_sdca_priv *rt721 =
container_of(work, struct rt721_sdca_priv, jack_detect_work.work);
- int btn_type = 0, ret;
+ int btn_type = 0;
if (!rt721->hs_jack)
return;
@@ -42,7 +42,7 @@ static void rt721_sdca_jack_detect_handler(struct work_struct *work)
if (rt721->scp_sdca_stat1 & SDW_SCP_SDCA_INT_SDCA_6) {
rt721->jack_type = rt_sdca_headset_detect(rt721->regmap,
RT721_SDCA_ENT_GE49);
- if (ret < 0)
+ if (rt721->jack_type < 0)
return;
}
--
2.34.1
^ permalink raw reply related [flat|nested] 4+ messages in thread