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| author | Christoph Hellwig <hch@lst.de> | 2006-01-06 18:34:07 +0100 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.(none)> | 2006-01-14 10:54:45 -0600 |
| commit | 776b23a0363d99ca402edc1aba1db8099b747b33 (patch) | |
| tree | 20cab193388facc2506e3de2a3d931ab22d81ae4 /drivers/scsi/sd.c | |
| parent | d4054239929479907f20b9d68c905589125ad343 (diff) | |
| download | linux-776b23a0363d99ca402edc1aba1db8099b747b33.tar.gz linux-776b23a0363d99ca402edc1aba1db8099b747b33.tar.bz2 linux-776b23a0363d99ca402edc1aba1db8099b747b33.zip | |
[SCSI] always handle REQ_BLOCK_PC requests in common code
LLDDs should never see REQ_BLOCK_PC requests, we can handle them just
fine in the core code. There is a small behaviour change in that some
check in sr's rw_intr are bypassed, but I consider the old behaviour
a bug.
Mike found this cleanup opportunity and provdided early patches, so all
the credit goes to him, even if I redid the patches from scratch beause
that was easier than forward-porting the old patches.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/sd.c')
| -rw-r--r-- | drivers/scsi/sd.c | 42 |
1 files changed, 5 insertions, 37 deletions
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index fbd8e1bbad38..930db398d107 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -232,34 +232,12 @@ static void scsi_disk_put(struct scsi_disk *sdkp) **/ static int sd_init_command(struct scsi_cmnd * SCpnt) { - unsigned int this_count, timeout; - struct gendisk *disk; - sector_t block; struct scsi_device *sdp = SCpnt->device; struct request *rq = SCpnt->request; - - timeout = sdp->timeout; - - /* - * SG_IO from block layer already setup, just copy cdb basically - */ - if (blk_pc_request(rq)) { - scsi_setup_blk_pc_cmnd(SCpnt); - if (rq->timeout) - timeout = rq->timeout; - - goto queue; - } - - /* - * we only do REQ_CMD and REQ_BLOCK_PC - */ - if (!blk_fs_request(rq)) - return 0; - - disk = rq->rq_disk; - block = rq->sector; - this_count = SCpnt->request_bufflen >> 9; + struct gendisk *disk = rq->rq_disk; + sector_t block = rq->sector; + unsigned int this_count = SCpnt->request_bufflen >> 9; + unsigned int timeout = sdp->timeout; SCSI_LOG_HLQUEUE(1, printk("sd_init_command: disk=%s, block=%llu, " "count=%d\n", disk->disk_name, @@ -402,8 +380,6 @@ static int sd_init_command(struct scsi_cmnd * SCpnt) SCpnt->transfersize = sdp->sector_size; SCpnt->underflow = this_count << 9; SCpnt->allowed = SD_MAX_RETRIES; - -queue: SCpnt->timeout_per_command = timeout; /* @@ -837,15 +813,7 @@ static void sd_rw_intr(struct scsi_cmnd * SCpnt) relatively rare error condition, no care is taken to avoid unnecessary additional work such as memcpy's that could be avoided. */ - - /* - * If SG_IO from block layer then set good_bytes to stop retries; - * else if errors, check them, and if necessary prepare for - * (partial) retries. - */ - if (blk_pc_request(SCpnt->request)) - good_bytes = this_count; - else if (driver_byte(result) != 0 && + if (driver_byte(result) != 0 && sense_valid && !sense_deferred) { switch (sshdr.sense_key) { case MEDIUM_ERROR: |