[SCSI] Simplify error handling a bit

 - to_do was never set to SYM_EH_DO_COMPLETE, so remove that code
 - move the spinlocks inside the common error handler code path

Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 8 insertions, 42 deletions

diff --git a/drivers/scsi/sym53c8xx_2/sym_glue.c b/drivers/scsi/sym53c8xx_2/sym_glue.c
index e6ff89a8524c..052ce11806ad 100644
--- a/drivers/scsi/sym53c8xx_2/sym_glue.c
+++ b/drivers/scsi/sym53c8xx_2/sym_glue.c
@@ -712,7 +712,6 @@ static void sym53c8xx_timer(unsigned long npref)
  *  What we will do regarding the involved SCSI command.
  */
 #define SYM_EH_DO_IGNORE        0
-#define SYM_EH_DO_COMPLETE      1
 #define SYM_EH_DO_WAIT          2
 
 /*
@@ -764,25 +763,18 @@ static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
 
         dev_warn(&cmd->device->sdev_gendev, "%s operation started.\n", opname);
 
+        spin_lock_irq(cmd->device->host->host_lock);
         /* This one is queued in some place -> to wait for completion */
         FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
                 struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
                 if (cp->cmd == cmd) {
                         to_do = SYM_EH_DO_WAIT;
-                        goto prepare;
+                        break;
                 }
         }
 
-prepare:
-        /* Prepare stuff to either ignore, complete or wait for completion */
-        switch(to_do) {
-        default:
-        case SYM_EH_DO_IGNORE:
-                break;
-        case SYM_EH_DO_WAIT:
+        if (to_do == SYM_EH_DO_WAIT) {
                 init_completion(&ep->done);
-                /* fall through */
-        case SYM_EH_DO_COMPLETE:
                 ep->old_done = cmd->scsi_done;
                 cmd->scsi_done = sym_eh_done;
                 SYM_UCMD_PTR(cmd)->eh_wait = ep;
@@ -818,9 +810,6 @@ prepare:
         }
 
         ep->to_do = to_do;
-        /* Complete the command with locks held as required by the driver */
-        if (to_do == SYM_EH_DO_COMPLETE)
-                sym_xpt_done2(np, cmd, DID_ABORT);
 
         /* Wait for completion with locks released, as required by kernel */
         if (to_do == SYM_EH_DO_WAIT) {
@@ -836,6 +825,7 @@ prepare:
                 if (ep->timed_out)
                         sts = -2;
         }
+        spin_unlock_irq(cmd->device->host->host_lock);
         dev_warn(&cmd->device->sdev_gendev, "%s operation %s.\n", opname,
                         sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
         return sts ? SCSI_FAILED : SCSI_SUCCESS;
@@ -847,46 +837,22 @@ prepare:
  */
 static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd)
 {
-        int rc;
-
-        spin_lock_irq(cmd->device->host->host_lock);
-        rc = sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
-        spin_unlock_irq(cmd->device->host->host_lock);
-
-        return rc;
+        return sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
 }
 
 static int sym53c8xx_eh_device_reset_handler(struct scsi_cmnd *cmd)
 {
-        int rc;
-
-        spin_lock_irq(cmd->device->host->host_lock);
-        rc = sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
-        spin_unlock_irq(cmd->device->host->host_lock);
-
-        return rc;
+        return sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
 }
 
 static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd)
 {
-        int rc;
-
-        spin_lock_irq(cmd->device->host->host_lock);
-        rc = sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd);
-        spin_unlock_irq(cmd->device->host->host_lock);
-
-        return rc;
+        return sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd);
 }
 
 static int sym53c8xx_eh_host_reset_handler(struct scsi_cmnd *cmd)
 {
-        int rc;
-
-        spin_lock_irq(cmd->device->host->host_lock);
-        rc = sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd);
-        spin_unlock_irq(cmd->device->host->host_lock);
-
-        return rc;
+        return sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd);
 }
 
 /*