PATCH 3/3
Set rq->errors more correctly in cciss driver. Previously
we had set it synonymously with the meaning of the last parameter
of end_that_last_request and complete_buffers (the "uptodate"
parameter) and had gotten away with it for all this time because
nobody ever looked at rq->errors. SCSI_IOCTL_SEND_COMMAND looks
at rq->errors, so now it matters that it be right.
Please consider this for inclusion.
Signed-off-by: Stephen M. Cameron <[email protected]>
Signed-off-by: Mike Miller <[email protected]>
---
linux-2.6.21-rc6/drivers/block/cciss.c | 43 ++++++++++++++++-----------------
1 files changed, 22 insertions(+), 21 deletions(-)
diff -puN linux-2.6.21-rc6/drivers/block/cciss.c~fix_cciss_rq_errors linux-2.6.21-rc6/drivers/block/cciss.c
--- cciss_sg_io/linux-2.6.21-rc6/drivers/block/cciss.c~fix_cciss_rq_errors 2007-04-10 14:32:28.000000000 -0500
+++ cciss_sg_io-scameron/linux-2.6.21-rc6/drivers/block/cciss.c 2007-04-10 14:32:28.000000000 -0500
@@ -1261,7 +1261,7 @@ static void cciss_softirq_done(struct re
pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir);
}
- complete_buffers(rq->bio, rq->errors);
+ complete_buffers(rq->bio, (rq->errors == 0));
if (blk_fs_request(rq)) {
const int rw = rq_data_dir(rq);
@@ -1275,7 +1275,7 @@ static void cciss_softirq_done(struct re
add_disk_randomness(rq->rq_disk);
spin_lock_irqsave(&h->lock, flags);
- end_that_request_last(rq, rq->errors);
+ end_that_request_last(rq, (rq->errors == 0));
cmd_free(h, cmd, 1);
cciss_check_queues(h);
spin_unlock_irqrestore(&h->lock, flags);
@@ -2366,27 +2366,27 @@ static inline void resend_cciss_cmd(ctlr
static inline int evaluate_target_status(CommandList_struct *cmd)
{
unsigned char sense_key;
- int status = 0; /* 0 means bad, 1 means good. */
+ int error_count = 1;
if (cmd->err_info->ScsiStatus != 0x02) { /* not check condition? */
if (!blk_pc_request(cmd->rq))
printk(KERN_WARNING "cciss: cmd %p "
"has SCSI Status 0x%x\n",
cmd, cmd->err_info->ScsiStatus);
- return status;
+ return error_count;
}
/* check the sense key */
sense_key = 0xf & cmd->err_info->SenseInfo[2];
/* no status or recovered error */
if ((sense_key == 0x0) || (sense_key == 0x1))
- status = 1;
+ error_count = 0;
if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */
- if (status == 0)
+ if (error_count != 0)
printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
" sense key = 0x%x\n", cmd, sense_key);
- return status;
+ return error_count;
}
/* SG_IO or similar, copy sense data back */
@@ -2398,7 +2398,7 @@ static inline int evaluate_target_status
} else
cmd->rq->sense_len = 0;
- return status;
+ return error_count;
}
/* checks the status of the job and calls complete buffers to mark all
@@ -2408,18 +2408,20 @@ static inline int evaluate_target_status
static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
int timeout)
{
- int status = 1;
int retry_cmd = 0;
+ struct request *rq = cmd->rq;
+
+ rq->errors = 0;
if (timeout)
- status = 0;
+ rq->errors = 1;
if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
goto after_error_processing;
switch (cmd->err_info->CommandStatus) {
case CMD_TARGET_STATUS:
- status = evaluate_target_status(cmd);
+ rq->errors = evaluate_target_status(cmd);
break;
case CMD_DATA_UNDERRUN:
if (blk_fs_request(cmd->rq)) {
@@ -2438,32 +2440,32 @@ static inline void complete_command(ctlr
case CMD_INVALID:
printk(KERN_WARNING "cciss: cmd %p is "
"reported invalid\n", cmd);
- status = 0;
+ rq->errors = 1;
break;
case CMD_PROTOCOL_ERR:
printk(KERN_WARNING "cciss: cmd %p has "
"protocol error \n", cmd);
- status = 0;
+ rq->errors = 1;
break;
case CMD_HARDWARE_ERR:
printk(KERN_WARNING "cciss: cmd %p had "
" hardware error\n", cmd);
- status = 0;
+ rq->errors = 1;
break;
case CMD_CONNECTION_LOST:
printk(KERN_WARNING "cciss: cmd %p had "
"connection lost\n", cmd);
- status = 0;
+ rq->errors = 1;
break;
case CMD_ABORTED:
printk(KERN_WARNING "cciss: cmd %p was "
"aborted\n", cmd);
- status = 0;
+ rq->errors = 1;
break;
case CMD_ABORT_FAILED:
printk(KERN_WARNING "cciss: cmd %p reports "
"abort failed\n", cmd);
- status = 0;
+ rq->errors = 1;
break;
case CMD_UNSOLICITED_ABORT:
printk(KERN_WARNING "cciss%d: unsolicited "
@@ -2477,17 +2479,17 @@ static inline void complete_command(ctlr
printk(KERN_WARNING
"cciss%d: %p retried too "
"many times\n", h->ctlr, cmd);
- status = 0;
+ rq->errors = 1;
break;
case CMD_TIMEOUT:
printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
- status = 0;
+ rq->errors = 1;
break;
default:
printk(KERN_WARNING "cciss: cmd %p returned "
"unknown status %x\n", cmd,
cmd->err_info->CommandStatus);
- status = 0;
+ rq->errors = 1;
}
after_error_processing:
@@ -2498,7 +2500,6 @@ after_error_processing:
return;
}
cmd->rq->data_len = 0;
- cmd->rq->errors = status;
cmd->rq->completion_data = cmd;
blk_add_trace_rq(cmd->rq->q, cmd->rq, BLK_TA_COMPLETE);
blk_complete_request(cmd->rq);
_
-
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