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authorFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>2008-07-04 03:33:01 -0400
committerJens Axboe <jens.axboe@oracle.com>2008-07-04 03:52:14 -0400
commitfce5384755e8e0e56c5609d2972db4702990d592 (patch)
tree901ce009cd49d95870d74c82d6e0b368368d4531 /drivers/media
parent62858dacc8dea55c5bdb474ccd8acb0657e23dd0 (diff)
cdrom: revert commit 22a9189 (cdrom: use kmalloced buffers instead of buffers on stack)
The commit 22a9189fd073db3d03a4cf8b8c098aa207602de1 (cdrom: use kmalloced buffers instead of buffers on stack) is introduced to use kmalloced buffers for packet commands to avoid stack corruption on non coherent platforms. SCSI cdrom uses blk_rq_map_kern, which properly avoids DMA on the stack by using the bounce buffers. IDE cdrom also has the mechnism to avoids DMA on the stack. So we don't need this extra complexitiy in cdrom.c, such as allocating just 8 bytes. The lower layers can handle it. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Tejun Heo <htejun@gmail.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'drivers/media')
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