On Tue, May 12, 2015 at 04:45:44PM +0530, Sudip Mukherjee wrote:
> if we load the module, unload and then again try to load the module, we
> will get a stackdump. In the module_exit function we are unregistering
> the device and releasing the parport. So when we reach the detach
> function parport is already null and the unregister_reboot_notifier()
> is never called. When we again try to load the module it again tries
> register_reboot_notifier() and gives us a stackdump as its earlier
> registration is still not removed. It was caused by the commit
> <bb046fef9668baf1c4744a3c7aba05e15e44c9ac>.
The right format is:
commit bb046fef9668 ('staging: panel: register reboot')
It is in case human beings reading your description don't remember which
patch bb046fef9668 was.
> Fix this by moving all the unregistering and releasing in the detach
> function, which should be the ideal case as the detach will be called if
> we try to unregister the driver or if the parport is removed.
>
We also have the Fixes: tag.
Fixes: bb046fef9668 ('staging: panel: register reboot')
> Signed-off-by: Sudip Mukherjee <sudip@xxxxxxxxxxxxxxx>
regards,
dan carpenter
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