linux-kernel - [patch] fix driver_register() return value

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Message-ID: <4ADA29AA.9070907@aknet.ru>
Date:	Sun, 18 Oct 2009 00:31:38 +0400
From:	Stas Sergeev <stsp@...et.ru>
To:	Greg KH <gregkh@...e.de>
CC:	Linux kernel <linux-kernel@...r.kernel.org>
Subject: [patch] fix driver_register() return value

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@...et.ru>

View attachment "drv_busy.diff" of type "text/x-patch" (404 bytes)