[PATCH v2 1/4] gpio: pca953x: avoid to use uninitialized value pinctrl

[Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>]

From: Haibo Chen <haibo.chen@xxxxxxx>

There is a variable pinctrl declared without initializer. And then
has the case (switch operation chose the default case) to directly
use this uninitialized value, this is not a safe behavior. So here
initialize the pinctrl as 0 to avoid this issue.
This is reported by Coverity.

Fixes: 13c5d4ce8060 ("gpio: pca953x: Add support for PCAL6534")
Signed-off-by: Haibo Chen <haibo.chen@xxxxxxx>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
v2: used default case (Andy)
 drivers/gpio/gpio-pca953x.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index a59d61cd44b2..5299e5bb76d6 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -474,6 +474,9 @@ static u8 pcal6534_recalc_addr(struct pca953x_chip *chip, int reg, int off)
 	case PCAL6524_DEBOUNCE:
 		pinctrl = ((reg & PCAL_PINCTRL_MASK) >> 1) + 0x1c;
 		break;
+	default:
+		pinctrl = 0;
+		break;
 	}
 
 	return pinctrl + addr + (off / BANK_SZ);
-- 
2.35.1