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authorLars-Peter Clausen <lars@metafoo.de>2010-11-11 18:00:53 (GMT)
committerAnton Vorontsov <cbouatmailru@gmail.com>2010-11-18 13:56:22 (GMT)
commit8477cedb49c69ce64b603d76c7776811eec0f9d7 (patch)
tree88528e5766e5c7434aa7d39ac5f631d1798b7b75 /drivers/power/jz4740-battery.c
parente1a85694e08d03efae9e08fdb292dfd4870837bc (diff)
downloadlinux-8477cedb49c69ce64b603d76c7776811eec0f9d7.tar.xz
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>
Diffstat (limited to 'drivers/power/jz4740-battery.c')
-rw-r--r--drivers/power/jz4740-battery.c5
1 files changed, 5 insertions, 0 deletions
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 @@ static int __devinit jz_battery_probe(struct platform_device *pdev)
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");