cciss: set rq->errors more correctly in driver

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.

Signed-off-by: Stephen M. Cameron <steve.cameron@hp.com>
Signed-off-by: Mike Miller <mike.miller@hp.com>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 22 insertions, 21 deletions

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index efcc908490df..4ec3e75ba474 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -1261,7 +1261,7 @@ static void cciss_softirq_done(struct request *rq)
                 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 request *rq)
 
         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_info_t *h, CommandList_struct *c)
 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(CommandList_struct *cmd)
         } 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(CommandList_struct *cmd)
 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_info_t *h, CommandList_struct *cmd,
         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_info_t *h, CommandList_struct *cmd,
                         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);