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authorMike Christie <michaelc@cs.wisc.edu>2005-09-10 16:45:35 -0500
committerJames Bottomley <jejb@mulgrave.(none)>2005-09-10 21:02:25 -0500
commit6f16b5359ceb96780eac4178393b0e8a3c8aa1ea (patch)
treec45e9bf0b69fb94317b572c8b3042417d6046e4f /drivers/scsi/scsi_lib.c
parent146f7262ee0ec7fc6882f06e5fcb13883308073c (diff)
[SCSI] set error value when failing commands in prep_fn
set DID_NO_CONNECT for the BLKPREP_KILL case and correct a few BLKPREP_DEFER cases that weren't checking for the need to plug the queue. Signed-Off-By: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/scsi_lib.c')
-rw-r--r--drivers/scsi/scsi_lib.c24
1 files changed, 16 insertions, 8 deletions
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index d8d98484153..863bb6495da 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -1146,7 +1146,7 @@ static int scsi_prep_fn(struct request_queue *q, struct request *req)
if (unlikely(!scsi_device_online(sdev))) {
printk(KERN_ERR "scsi%d (%d:%d): rejecting I/O to offline device\n",
sdev->host->host_no, sdev->id, sdev->lun);
- return BLKPREP_KILL;
+ goto kill;
}
if (unlikely(sdev->sdev_state != SDEV_RUNNING)) {
/* OK, we're not in a running state don't prep
@@ -1156,7 +1156,7 @@ static int scsi_prep_fn(struct request_queue *q, struct request *req)
* at all allowed down */
printk(KERN_ERR "scsi%d (%d:%d): rejecting I/O to dead device\n",
sdev->host->host_no, sdev->id, sdev->lun);
- return BLKPREP_KILL;
+ goto kill;
}
/* OK, we only allow special commands (i.e. not
* user initiated ones */
@@ -1188,11 +1188,11 @@ static int scsi_prep_fn(struct request_queue *q, struct request *req)
if(unlikely(specials_only) && !(req->flags & REQ_SPECIAL)) {
if(specials_only == SDEV_QUIESCE ||
specials_only == SDEV_BLOCK)
- return BLKPREP_DEFER;
+ goto defer;
printk(KERN_ERR "scsi%d (%d:%d): rejecting I/O to device being removed\n",
sdev->host->host_no, sdev->id, sdev->lun);
- return BLKPREP_KILL;
+ goto kill;
}
@@ -1210,7 +1210,7 @@ static int scsi_prep_fn(struct request_queue *q, struct request *req)
cmd->tag = req->tag;
} else {
blk_dump_rq_flags(req, "SCSI bad req");
- return BLKPREP_KILL;
+ goto kill;
}
/* note the overloading of req->special. When the tag
@@ -1248,8 +1248,13 @@ static int scsi_prep_fn(struct request_queue *q, struct request *req)
* required).
*/
ret = scsi_init_io(cmd);
- if (ret) /* BLKPREP_KILL return also releases the command */
- return ret;
+ switch(ret) {
+ case BLKPREP_KILL:
+ /* BLKPREP_KILL return also releases the command */
+ goto kill;
+ case BLKPREP_DEFER:
+ goto defer;
+ }
/*
* Initialize the actual SCSI command for this request.
@@ -1259,7 +1264,7 @@ static int scsi_prep_fn(struct request_queue *q, struct request *req)
if (unlikely(!drv->init_command(cmd))) {
scsi_release_buffers(cmd);
scsi_put_command(cmd);
- return BLKPREP_KILL;
+ goto kill;
}
} else {
memcpy(cmd->cmnd, req->cmd, sizeof(cmd->cmnd));
@@ -1290,6 +1295,9 @@ static int scsi_prep_fn(struct request_queue *q, struct request *req)
if (sdev->device_busy == 0)
blk_plug_device(q);
return BLKPREP_DEFER;
+ kill:
+ req->errors = DID_NO_CONNECT << 16;
+ return BLKPREP_KILL;
}
/*