linux-kernel - Re: [PATCH 2/2] block: clear ro on fd detach fd is bound

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Date:	Mon, 24 Jan 2011 10:28:08 +0900
From:	"J. R. Okajima" <hooanon05@...oo.co.jp>
To:	Tejun Heo <tj@...nel.org>
Cc:	Jens Axboe <axboe@...nel.dk>,
	David Brownell <dbrownell@...rs.sourceforge.net>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH 2/2] block: clear ro on fd detach fd is bound


Tejun Heo:
> Commit 75f1dc0d (block: check bdev_read_only() from blkdev_get())
> enforced bdev_read_only() check during blkdev_get().  This had an
> unfortunate side effect on loop because loop didn't clear ro flag on
> fd detach, so once a loop device was used ro, it can't be used for rw
> at all.
>
> Fix it by clearing ro flag on fd detach.

Tested and succeeded, thanx.


J. R. Okajima
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