[PATCH] ASoC: codecs: avoid possible garbage value in peb2466_reg_read()

[Su Hui <suhui@xxxxxxxxxxxx>]

Clang static checker (scan-build) warning:
sound/soc/codecs/peb2466.c:232:8:
Assigned value is garbage or undefined [core.uninitialized.Assign]
  232 |                 *val = tmp;
      |                      ^ ~~~

When peb2466_read_byte() fails, 'tmp' will have a garbage value.
Add a judgemnet to avoid this problem.

Fixes: 227f609c7c0e ("ASoC: codecs: Add support for the Infineon PEB2466 codec")
Signed-off-by: Su Hui <suhui@xxxxxxxxxxxx>
---
 sound/soc/codecs/peb2466.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/peb2466.c b/sound/soc/codecs/peb2466.c
index 76ee7e3f4d9b..67ea70cef0c7 100644
--- a/sound/soc/codecs/peb2466.c
+++ b/sound/soc/codecs/peb2466.c
@@ -229,7 +229,8 @@ static int peb2466_reg_read(void *context, unsigned int reg, unsigned int *val)
 	case PEB2466_CMD_XOP:
 	case PEB2466_CMD_SOP:
 		ret = peb2466_read_byte(peb2466, reg, &tmp);
-		*val = tmp;
+		if (!ret)
+			*val = tmp;
 		break;
 	default:
 		dev_err(&peb2466->spi->dev, "Not a XOP or SOP command\n");
-- 
2.30.2