jz4740-battery: Check if platform_data is supplied
Currently platform_data is dereferenced without checking whether it
is actually set, which can lead to kernel crashes.
This patch adds a check which will abort the drivers probe function
gracefully if no platform_data is supplied.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
diff --git a/drivers/power/jz4740-battery.c b/drivers/power/jz4740-battery.c
index 2bbe04a..5b48215 100644
--- a/drivers/power/jz4740-battery.c
+++ b/drivers/power/jz4740-battery.c
@@ -246,6 +246,11 @@
struct jz_battery *jz_battery;
struct power_supply *battery;
+ if (!pdata) {
+ dev_err(&pdev->dev, "No platform_data supplied\n");
+ return -ENXIO;
+ }
+
jz_battery = kzalloc(sizeof(*jz_battery), GFP_KERNEL);
if (!jz_battery) {
dev_err(&pdev->dev, "Failed to allocate driver structure\n");