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driver core: dev_get_drvdata: Don't check for NULL dev

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There is no point in calling dev_get_drvdata without a valid device.
So checking for dev == NULL is pointless. If such a check is ever
needed - which I doubt - the driver should do it before calling
dev_get_drvdata.

We were returning NULL if dev was NULL, which the caller certainly did
not expect anyway, so that was only delaying the crash if the caller
is not paying attention.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jean Delvare 2014-04-14 12:57:43 +02:00 committed by Greg Kroah-Hartman
parent 2c1f1ff0f0
commit d433201391
1 changed files with 1 additions and 3 deletions
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4
drivers/base/dd.c
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@ -594,9 +594,7 @@ void driver_detach(struct device_driver *drv)
*/ */
void *dev_get_drvdata(const struct device *dev) void *dev_get_drvdata(const struct device *dev)
{ {
if (dev) return dev->driver_data;
return dev->driver_data;
return NULL;
} }
EXPORT_SYMBOL(dev_get_drvdata); EXPORT_SYMBOL(dev_get_drvdata);