From eb7ebfa3c1989aa8e59d5e68ab3cddd7df1bfb27 Mon Sep 17 00:00:00 2001
From: Philipp Klocke <philipp97kl@gmail.com>
Date: Thu, 18 Oct 2018 12:33:02 +0200
Subject: [PATCH] ALSA: i2c/cs8427: Fix int to char conversion
Git-commit: eb7ebfa3c1989aa8e59d5e68ab3cddd7df1bfb27
Patch-mainline: v4.20-rc1
References: bsc#1051510
Compiling with clang yields the following warning:
sound/i2c/cs8427.c:140:31: warning: implicit conversion from 'int'
to 'char' changes value from 160 to -96 [-Wconstant-conversion]
data[0] = CS8427_REG_AUTOINC | CS8427_REG_CORU_DATABUF;
~ ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Because CS8427_REG_AUTOINC is defined as 128, it is too big for a
char field.
So change data from char to unsigned char, that it can hold the value.
This patch does not change the generated code.
Signed-off-by: Philipp Klocke <philipp97kl@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
sound/i2c/cs8427.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sound/i2c/cs8427.c b/sound/i2c/cs8427.c
index 2647309bc675..8afa2f888466 100644
--- a/sound/i2c/cs8427.c
+++ b/sound/i2c/cs8427.c
@@ -118,7 +118,7 @@ static int snd_cs8427_send_corudata(struct snd_i2c_device *device,
struct cs8427 *chip = device->private_data;
char *hw_data = udata ?
chip->playback.hw_udata : chip->playback.hw_status;
- char data[32];
+ unsigned char data[32];
int err, idx;
if (!memcmp(hw_data, ndata, count))
--
2.16.4