[lkml]   [2018]   [Oct]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Patch in this message
Subject[PATCH v2] pinctrl: madera: Fix uninitialized variable bug in madera_mux_set_mux
There is a potential execution path in which variable *ret* is checked
in an IF statement, and then its value is used to report an error at
line 659 without being properly initialized previously:

659 if (ret)
660 dev_err(priv->dev, "Failed to write to 0x%x (%d)\n", reg, ret);

Fix this by initializing variable *ret* to 0 in order to
avoid unpredictable or unintended results.

Addresses-Coverity-ID: 1471969 ("Uninitialized scalar variable")
Fixes: 218d72a77b0b ("pinctrl: madera: Add driver for Cirrus Logic Madera codecs")
Signed-off-by: Gustavo A. R. Silva <>
Changes in v2:
- Initialize variable ret to 0 instead of -1. Thanks to Charles Keepax
for pointing this out.
- Update subject and commit log.

drivers/pinctrl/cirrus/pinctrl-madera-core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pinctrl/cirrus/pinctrl-madera-core.c b/drivers/pinctrl/cirrus/pinctrl-madera-core.c
index 0266302..a5dda83 100644
--- a/drivers/pinctrl/cirrus/pinctrl-madera-core.c
+++ b/drivers/pinctrl/cirrus/pinctrl-madera-core.c
@@ -608,7 +608,7 @@ static int madera_mux_set_mux(struct pinctrl_dev *pctldev,
unsigned int n_chip_groups = priv->chip->n_pin_groups;
const char *func_name = madera_mux_funcs[selector].name;
unsigned int reg;
- int i, ret;
+ int i, ret = 0;

dev_dbg(priv->dev, "%s selecting %u (%s) for group %u (%s)\n",
__func__, selector, func_name, group,
 \ /
  Last update: 2018-10-10 17:14    [W:0.060 / U:0.964 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site