From 218674a45930c700486d27b765bf2f1b43f8cbf7 Mon Sep 17 00:00:00 2001
From: Nathan Chancellor <nathan@kernel.org>
Date: Thu, 2 Feb 2023 09:34:19 -0700
Subject: [PATCH] ASoC: mchp-spdifrx: Fix uninitialized use of mr in mchp_spdifrx_hw_params()
Git-commit: 218674a45930c700486d27b765bf2f1b43f8cbf7
Patch-mainline: v6.3-rc1
References: git-fixes

Clang warns:

  ../sound/soc/atmel/mchp-spdifrx.c:455:3: error: variable 'mr' is uninitialized when used here [-Werror,-Wuninitialized]
                  mr |= SPDIFRX_MR_ENDIAN_BIG;
                  ^~
  ../sound/soc/atmel/mchp-spdifrx.c:432:8: note: initialize the variable 'mr' to silence this warning
          u32 mr;
                ^
                 = 0
  1 error generated.

Zero initialize mr so that these bitwise OR and assignment operation
works unconditionally.

Fixes: fa09fa60385a ("ASoC: mchp-spdifrx: fix controls which rely on rsr register")
Link: https://github.com/ClangBuiltLinux/linux/issues/1797
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20230202-mchp-spdifrx-fix-uninit-mr-v1-1-629a045d7a2f@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 sound/soc/atmel/mchp-spdifrx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/atmel/mchp-spdifrx.c b/sound/soc/atmel/mchp-spdifrx.c
index 526dd3a17471..eb0c0ef4541e 100644
--- a/sound/soc/atmel/mchp-spdifrx.c
+++ b/sound/soc/atmel/mchp-spdifrx.c
@@ -429,7 +429,7 @@ static int mchp_spdifrx_hw_params(struct snd_pcm_substream *substream,
 				  struct snd_soc_dai *dai)
 {
 	struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai);
-	u32 mr;
+	u32 mr = 0;
 	int ret;
 
 	dev_dbg(dev->dev, "%s() rate=%u format=%#x width=%u channels=%u\n",
-- 
2.35.3