[ARM] 3018/1: S3C2410 - check de-referenced device is really a platform device
Patch from Ben Dooks
Check that the device we are looking at is really
a platform device before trying to cast it to one
to find out the platform bus number.
Thanks to RMK for pointing this out.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-s3c2410/clock.c b/arch/arm/mach-s3c2410/clock.c
index f596082..8b3d5dc 100644
--- a/arch/arm/mach-s3c2410/clock.c
+++ b/arch/arm/mach-s3c2410/clock.c
@@ -98,7 +98,10 @@
struct clk *clk = ERR_PTR(-ENOENT);
int idno;
- idno = (dev == NULL) ? -1 : to_platform_device(dev)->id;
+ if (dev == NULL || dev->bus != &platform_bus_type)
+ idno = -1;
+ else
+ idno = to_platform_device(dev)->id;
down(&clocks_sem);