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[SCSI] Simplify error handling a bit

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- 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>
This commit is contained in:
Matthew Wilcox 2006-03-28 11:03:44 -05:00 committed by James Bottomley
parent b6d105d7ee
commit ab19d52bec
1 changed files with 8 additions and 42 deletions
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50
drivers/scsi/sym53c8xx_2/sym_glue.c
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@ -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 @@ static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
}
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 @@ static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
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 @@ static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
*/
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);
}
/*