[PATCH] pinctrl: madera: Fix uninitialized variable issue in madera_mux_set_mux

Gustavo A. R. Silva
2018-10-10T14:15:00Z

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 -1.

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 <gustavo@embeddedor.com>
---
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..a99ace8 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 = -1;

dev_dbg(priv->dev, "%s selecting %u (%s) for group %u (%s)\n",
__func__, selector, func_name, group,
--
2.7.4