Re: [patch] fix driver_register() return value

[Greg KH]

On Sun, Oct 18, 2009 at 12:31:38AM +0400, Stas Sergeev wrote:
> Hi Greg.
>
> In this patch:
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=16dc42e018c2868211b4928f20a957c0c216126c
> the check was added for another
> driver to already claim the same
> device on the same bus. But the
> returned error code was wrong:
> to modprobe, the -EEXIST means
> that _this_ driver is already
> installed. It therefore doesn't
> produce the needed error message
> when _another_ driver is trying
> to register for the same device.
> Returning -EBUSY fixes the problem.
>
> Signed-off-by: Stas Sergeev <stsp@xxxxxxxx>

Does this cause problems with the way things now are?  If so, what are
they?  Does this change need to be backported to older -stable kernels?

thanks,

greg k-h
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