On Tue, May 12 2009, Tejun Heo wrote:
> Commit c3a4d78c580de4edc9ef0f7c59812fb02ceb037f introduced
> rq->data_len and converted residual count users to it. While
> converting, it mistakenly converted scsi_end_request() to finish
> requests with residual count when it wants to do is fully complete the
> request. Fix it by using blk_end_request_all() instead.
>
> This bug was spotted by Boaz Harrosh.
Added, thanks.
>
> Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
> Spotted-by: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
> Cc: Jens Axboe <jens.axboe@xxxxxxxxxx>
> Cc: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx>
> Cc: James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>
> ---
> drivers/scsi/scsi_lib.c | 7 +------
> 1 file changed, 1 insertion(+), 6 deletions(-)
>
> diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
> index a54bec9..e410d66 100644
> --- a/drivers/scsi/scsi_lib.c
> +++ b/drivers/scsi/scsi_lib.c
> @@ -546,14 +546,9 @@ static struct scsi_cmnd *scsi_end_request(struct scsi_cmnd *cmd, int error,
> * to queue the remainder of them.
> */
> if (blk_end_request(req, error, bytes)) {
> - int leftover = blk_rq_bytes(req);
> -
> - if (blk_pc_request(req))
> - leftover = req->resid_len;
> -
> /* kill remainder if no retrys */
> if (error && scsi_noretry_cmd(cmd))
> - blk_end_request(req, error, leftover);
> + blk_end_request_all(req, error);
> else {
> if (requeue) {
> /*
>
--
Jens Axboe
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