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authorKiyoshi Ueda <k-ueda@ct.jp.nec.com>2008-02-19 01:41:26 +0100
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2008-02-19 01:41:26 +0100
commit14e04c3f6e64bac468f0aa38c6d47aa95b60c074 (patch)
treecd36afdec1da344f14b74145a8aacc6f28b10cc0 /drivers/ide
parentht6560b: force prefetch for some devices (diff)
downloadlinux-14e04c3f6e64bac468f0aa38c6d47aa95b60c074.tar.xz
linux-14e04c3f6e64bac468f0aa38c6d47aa95b60c074.zip
ide-cd: fix missing residual count setting in DMA mode
This patch fixes the missing residual count setting in DMA mode, which was introduced during the conversion to blk-end-request. The residual count could be used by the request submitter. So if it isn't set correctly, some upper layers does not work. (e.g. wodim for CD burning.) The bug is in only DMA mode. In PIO mode, we are setting the residual count correctly, so no need to fix. Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com> Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com> Reported-by: Andreas Schwab <schwab@suse.de> Tested-by: Andreas Schwab <schwab@suse.de> Tested-by: Laura Garcia <nevola@gmail.com> Tested-by: Borislav Petkov <petkovbb@googlemail.com> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide')
-rw-r--r--drivers/ide/ide-cd.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 354c91d06a6d..310e497b5838 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -1207,9 +1207,13 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
end_request:
if (blk_pc_request(rq)) {
unsigned long flags;
+ unsigned int dlen = rq->data_len;
+
+ if (dma)
+ rq->data_len = 0;
spin_lock_irqsave(&ide_lock, flags);
- if (__blk_end_request(rq, 0, rq->data_len))
+ if (__blk_end_request(rq, 0, dlen))
BUG();
HWGROUP(drive)->rq = NULL;
spin_unlock_irqrestore(&ide_lock, flags);