[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>
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@ -98,7 +98,10 @@ struct clk *clk_get(struct device *dev, const char *id)
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struct clk *clk = ERR_PTR(-ENOENT);
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int idno;
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idno = (dev == NULL) ? -1 : to_platform_device(dev)->id;
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if (dev == NULL || dev->bus != &platform_bus_type)
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idno = -1;
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else
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idno = to_platform_device(dev)->id;
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down(&clocks_sem);
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