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[ARM] 3018/1: S3C2410 - check de-referenced device is really a platform device

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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>
This commit is contained in:
Ben Dooks 2005-10-18 07:51:34 +01:00 committed by Russell King
parent 39ca371c45
commit c086f282c0
1 changed files with 4 additions and 1 deletions
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5
arch/arm/mach-s3c2410/clock.c
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@ -98,7 +98,10 @@ struct clk *clk_get(struct device *dev, const char *id)
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);