From: Akinobu Mita <akinobu.mita@gmail.com>
Date: Sun, 25 May 2014 12:43:33 +0000 (+0900)
Subject: block: fix BLKSECTGET ioctl when max_sectors is greater than USHRT_MAX
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~75^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=63f264965947ac6299452711f614f086955b2515;p=pandora-kernel.git

block: fix BLKSECTGET ioctl when max_sectors is greater than USHRT_MAX

BLKSECTGET ioctl loads the request queue's max_sectors as unsigned
short value to the argument pointer.  So if the max_sector is greater
than USHRT_MAX, the upper 16 bits of that is just discarded.

In such case, USHRT_MAX is more preferable than the lower 16 bits of
max_sectors.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
Cc: Douglas Gilbert <dgilbert@interlog.com>
Cc: linux-scsi@vger.kernel.org
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
---

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