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Date: Fri, 17 Nov 2006 15:21:59 +0100
From: Adrian Bunk <bunk@...sta.de>
To: Pavel Mironchik <pmironchik@...ifacio.net>
Cc: a.zummo@...ertech.it, linux-kernel@...r.kernel.org
Subject: [2.6 patch] drivers/rtc/rtc-rs5c372.c: fix a NULL dereference
The correct order is: NULL check before dereference
This was a guaranteed NULL dereference with debugging enabled since
rs5c372_sysfs_show_osc() does actually pass NULL...
Spotted by the Coverity checker.
Signed-off-by: Adrian Bunk <bunk@...sta.de>
--- linux-2.6.19-rc5-mm2/drivers/rtc/rtc-rs5c372.c.old 2006-11-17 14:15:53.000000000 +0100
+++ linux-2.6.19-rc5-mm2/drivers/rtc/rtc-rs5c372.c 2006-11-17 14:16:53.000000000 +0100
@@ -126,13 +126,13 @@ static int rs5c372_get_trim(struct i2c_c
return -EIO;
}
- dev_dbg(&client->dev, "%s: raw trim=%x\n", __FUNCTION__, *trim);
-
if (osc)
*osc = (buf & RS5C372_TRIM_XSL) ? 32000 : 32768;
- if (trim)
+ if (trim) {
*trim = buf & RS5C372_TRIM_MASK;
+ dev_dbg(&client->dev, "%s: raw trim=%x\n", __FUNCTION__, *trim);
+ }
return 0;
}
-
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