[PATCH v1] pinctrl: ralink: rt2880: Check for return value of devm_kcalloc()

[QintaoShen <unSimple1993@xxxxxxx>]

The memory allocation function devm_kcalloc() may return NULL pointer,
so it is better to add a check for 'p->func[i]->pins' to avoid possible
NULL pointer dereference.

Signed-off-by: QintaoShen <unSimple1993@xxxxxxx>
---
 drivers/pinctrl/ralink/pinctrl-rt2880.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/pinctrl/ralink/pinctrl-rt2880.c b/drivers/pinctrl/ralink/pinctrl-rt2880.c
index 96fc06d..308610e 100644
--- a/drivers/pinctrl/ralink/pinctrl-rt2880.c
+++ b/drivers/pinctrl/ralink/pinctrl-rt2880.c
@@ -266,6 +266,10 @@ static int rt2880_pinmux_pins(struct rt2880_priv *p)
 						p->func[i]->pin_count,
 						sizeof(int),
 						GFP_KERNEL);
+        
+        if (!p->func[i]->pins)
+            continue;
+
 		for (j = 0; j < p->func[i]->pin_count; j++)
 			p->func[i]->pins[j] = p->func[i]->pin_first + j;
 
-- 
2.7.4