1 files changed, 79 insertions, 6 deletions

diff --git a/drivers/block/cciss_scsi.c b/drivers/block/cciss_scsi.c
index a3fd87b41444..8575c48c8917 100644
--- a/drivers/block/cciss_scsi.c
+++ b/drivers/block/cciss_scsi.c
@@ -58,6 +58,18 @@ static int sendcmd(
         unsigned char *scsi3addr,
         int cmd_type);
 
+static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
+        size_t size,
+        unsigned int use_unit_num, /* 0: address the controller,
+                                      1: address logical volume log_unit,
+                                      2: periph device address is scsi3addr */
+        unsigned int log_unit, __u8 page_code, unsigned char *scsi3addr,
+        int cmd_type);
+
+static int sendcmd_core(ctlr_info_t *h, CommandList_struct *c);
+
+static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool);
+static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool);
 
 static int cciss_scsi_proc_info(
                 struct Scsi_Host *sh,
@@ -1575,6 +1587,68 @@ cciss_seq_tape_report(struct seq_file *seq, int ctlr)
         CPQ_TAPE_UNLOCK(ctlr, flags);
 }
 
+static int wait_for_device_to_become_ready(ctlr_info_t *h,
+        unsigned char lunaddr[])
+{
+        int rc;
+        int count = 0;
+        int waittime = HZ;
+        CommandList_struct *c;
+
+        c = cmd_alloc(h, 1);
+        if (!c) {
+                printk(KERN_WARNING "cciss%d: out of memory in "
+                        "wait_for_device_to_become_ready.\n", h->ctlr);
+                return IO_ERROR;
+        }
+
+        /* Send test unit ready until device ready, or give up. */
+        while (count < 20) {
+
+                /* Wait for a bit.  do this first, because if we send
+                 * the TUR right away, the reset will just abort it.
+                 */
+                set_current_state(TASK_INTERRUPTIBLE);
+                schedule_timeout(waittime);
+                count++;
+
+                /* Increase wait time with each try, up to a point. */
+                if (waittime < (HZ * 30))
+                        waittime = waittime * 2;
+
+                /* Send the Test Unit Ready */
+                rc = fill_cmd(c, TEST_UNIT_READY, h->ctlr, NULL, 0, 0, 0, 0,
+                        lunaddr, TYPE_CMD);
+                if (rc == 0) {
+                        rc = sendcmd_core(h, c);
+                        /* sendcmd turned off interrupts, turn 'em back on. */
+                        h->access.set_intr_mask(h, CCISS_INTR_ON);
+                }
+
+                if (rc == 0 && c->err_info->CommandStatus == CMD_SUCCESS)
+                        break;
+
+                if (rc == 0 &&
+                        c->err_info->CommandStatus == CMD_TARGET_STATUS &&
+                        c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION &&
+                        (c->err_info->SenseInfo[2] == NO_SENSE ||
+                        c->err_info->SenseInfo[2] == UNIT_ATTENTION))
+                        break;
+
+                printk(KERN_WARNING "cciss%d: Waiting %d secs "
+                        "for device to become ready.\n",
+                        h->ctlr, waittime / HZ);
+                rc = 1; /* device not ready. */
+        }
+
+        if (rc)
+                printk("cciss%d: giving up on device.\n", h->ctlr);
+        else
+                printk(KERN_WARNING "cciss%d: device is ready.\n", h->ctlr);
+
+        cmd_free(h, c, 1);
+        return rc;
+}
 
 /* Need at least one of these error handlers to keep ../scsi/hosts.c from 
  * complaining.  Doing a host- or bus-reset can't do anything good here. 
@@ -1591,6 +1665,7 @@ static int cciss_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
 {
         int rc;
         CommandList_struct *cmd_in_trouble;
+        unsigned char lunaddr[8];
         ctlr_info_t **c;
         int ctlr;
 
@@ -1600,19 +1675,17 @@ static int cciss_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
                 return FAILED;
         ctlr = (*c)->ctlr;
         printk(KERN_WARNING "cciss%d: resetting tape drive or medium changer.\n", ctlr);
-
         /* find the command that's giving us trouble */
         cmd_in_trouble = (CommandList_struct *) scsicmd->host_scribble;
-        if (cmd_in_trouble == NULL) { /* paranoia */
+        if (cmd_in_trouble == NULL) /* paranoia */
                 return FAILED;
-        }
+        memcpy(lunaddr, &cmd_in_trouble->Header.LUN.LunAddrBytes[0], 8);
         /* send a reset to the SCSI LUN which the command was sent to */
-        rc = sendcmd(CCISS_RESET_MSG, ctlr, NULL, 0, 2, 0, 0, 
-                (unsigned char *) &cmd_in_trouble->Header.LUN.LunAddrBytes[0], 
+        rc = sendcmd(CCISS_RESET_MSG, ctlr, NULL, 0, 2, 0, 0, lunaddr,
                 TYPE_MSG);
         /* sendcmd turned off interrupts on the board, turn 'em back on. */
         (*c)->access.set_intr_mask(*c, CCISS_INTR_ON);
-        if (rc == 0)
+        if (rc == 0 && wait_for_device_to_become_ready(*c, lunaddr) == 0)
                 return SUCCESS;
         printk(KERN_WARNING "cciss%d: resetting device failed.\n", ctlr);
         return FAILED;