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[RESEND,11/14,media] ddbridge: fix impossible condition warning

Message ID 20170723181630.19526-12-d.scheller.oss@gmail.com (mailing list archive)
State New, archived
Headers show

Commit Message

Daniel Scheller July 23, 2017, 6:16 p.m. UTC 
From: Daniel Scheller <d.scheller@gmx.net>

Smatch and gcc complained:

  drivers/media/pci/ddbridge/ddbridge-core.c:3491 bpsnr_show() warn: impossible condition '(snr[0] == 255) => ((-128)-127 == 255)'

  drivers/media/pci/ddbridge/ddbridge-core.c: In function ‘bpsnr_show’:
  drivers/media/pci/ddbridge/ddbridge-core.c:3491:13: warning: comparison is always false due to limited range of data type [-Wtype-limits]

Fix this by changing the type of snr to unsigned char.

Cc: Ralph Metzler <rjkm@metzlerbros.de>
Signed-off-by: Daniel Scheller <d.scheller@gmx.net>
Tested-by: Richard Scobie <r.scobie@clear.net.nz>
Tested-by: Jasmin Jessich <jasmin@anw.at>
Tested-by: Dietmar Spingler <d_spingler@freenet.de>
Tested-by: Manfred Knick <Manfred.Knick@t-online.de>
---
 drivers/media/pci/ddbridge/ddbridge-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/media/pci/ddbridge/ddbridge-core.c b/drivers/media/pci/ddbridge/ddbridge-core.c
index 2479cb70743e..e3119351b9a1 100644
--- a/drivers/media/pci/ddbridge/ddbridge-core.c
+++ b/drivers/media/pci/ddbridge/ddbridge-core.c
@@ -3250,7 +3250,7 @@  static ssize_t bpsnr_show(struct device *device,
 			 struct device_attribute *attr, char *buf)
 {
 	struct ddb *dev = dev_get_drvdata(device);
-	char snr[32];
+	unsigned char snr[32];
 
 	if (!dev->i2c_num)
 		return 0;