[alsa-devel] [PATCH] ASoC: fix oops w/ for_each_rtd_codec_dai_rollback() macro
A kernel oops happens on an error case (usual missing BE mixer configuration required by Intel SST driver). Git bisect points to this macro and an operator precedence issue.
for (; ((i--) >= 0) && ((dai) = rtd->codec_dais[i]);)
The initial code replaced by this macro was while (--i >= 0) { codec_dai = rtd->codec_dais[i];
Fix the C operator precedence difference by reverting to pre-decrement
Fixes: 0b7990e3897 ('ASoC: add for_each_rtd_codec_dai() macro') Cc: Kuninori Morimoto kuninori.morimoto.gx@renesas.com Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com --- include/sound/soc.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/sound/soc.h b/include/sound/soc.h index f1dab1f4b194..70c10a8f3e90 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -1192,7 +1192,7 @@ struct snd_soc_pcm_runtime { ((i) < rtd->num_codecs) && ((dai) = rtd->codec_dais[i]); \ (i)++) #define for_each_rtd_codec_dai_rollback(rtd, i, dai) \ - for (; ((i--) >= 0) && ((dai) = rtd->codec_dais[i]);) + for (; ((--i) >= 0) && ((dai) = rtd->codec_dais[i]);)
/* mixer control */
The patch
ASoC: fix oops w/ for_each_rtd_codec_dai_rollback() macro
has been applied to the asoc tree at
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git
All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.
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Thanks, Mark
From 23cb2d04db54535df65edbbebbca89f2590f08bd Mon Sep 17 00:00:00 2001
From: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Date: Fri, 26 Oct 2018 16:54:43 -0500 Subject: [PATCH] ASoC: fix oops w/ for_each_rtd_codec_dai_rollback() macro
A kernel oops happens on an error case (usual missing BE mixer configuration required by Intel SST driver). Git bisect points to this macro and an operator precedence issue.
for (; ((i--) >= 0) && ((dai) = rtd->codec_dais[i]);)
The initial code replaced by this macro was while (--i >= 0) { codec_dai = rtd->codec_dais[i];
Fix the C operator precedence difference by reverting to pre-decrement
Fixes: 0b7990e3897 ('ASoC: add for_each_rtd_codec_dai() macro') Cc: Kuninori Morimoto kuninori.morimoto.gx@renesas.com Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown broonie@kernel.org --- include/sound/soc.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/sound/soc.h b/include/sound/soc.h index f1dab1f4b194..70c10a8f3e90 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -1192,7 +1192,7 @@ struct snd_soc_pcm_runtime { ((i) < rtd->num_codecs) && ((dai) = rtd->codec_dais[i]); \ (i)++) #define for_each_rtd_codec_dai_rollback(rtd, i, dai) \ - for (; ((i--) >= 0) && ((dai) = rtd->codec_dais[i]);) + for (; ((--i) >= 0) && ((dai) = rtd->codec_dais[i]);)
/* mixer control */
participants (2)
-
Mark Brown -
Pierre-Louis Bossart