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scsi: sym53c8xx_2: Rework reset handling 

Split off the combined abort and device reset handling into distinct
functions. And rename the current device reset handler into a target reset
handler, seeing that it really is a target reset.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Link: https://lore.kernel.org/r/20231002154328.43718-15-hare@suse.de
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Hannes Reinecke 2023-10-02 17:43:24 +02:00 committed by Martin K. Petersen
parent 4980ae18c3
commit c7c559d2b3
1 changed files with 55 additions and 27 deletions
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82
drivers/scsi/sym53c8xx_2/sym_glue.c
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@ -564,7 +564,10 @@ static void sym53c8xx_timer(struct timer_list *t)
* Generic method for our eh processing.
* The 'op' argument tells what we have to do.
*/
static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
/*
* Error handlers called from the eh thread (one thread per HBA).
*/
static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd)
{
struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
struct Scsi_Host *shost = cmd->device->host;
@ -576,7 +579,7 @@ static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
int sts = -1;
struct completion eh_done;
scmd_printk(KERN_WARNING, cmd, "%s operation started\n", opname);
scmd_printk(KERN_WARNING, cmd, "ABORT operation started\n");
/*
* Escalate to host reset if the PCI bus went down
@ -594,19 +597,7 @@ static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
}
}
/* Try to proceed the operation we have been asked for */
sts = -1;
switch(op) {
case SYM_EH_ABORT:
sts = sym_abort_scsiio(np, cmd, 1);
break;
case SYM_EH_DEVICE_RESET:
sts = sym_reset_scsi_target(np, cmd->device->id);
break;
default:
break;
}
sts = sym_abort_scsiio(np, cmd, 1);
/* On error, restore everything and cross fingers :) */
if (sts)
cmd_queued = 0;
@ -623,23 +614,60 @@ static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
spin_unlock_irq(shost->host_lock);
}
dev_warn(&cmd->device->sdev_gendev, "%s operation %s.\n", opname,
dev_warn(&cmd->device->sdev_gendev, "ABORT operation %s.\n",
sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
return sts ? SCSI_FAILED : SCSI_SUCCESS;
}
/*
* Error handlers called from the eh thread (one thread per HBA).
*/
static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd)
static int sym53c8xx_eh_target_reset_handler(struct scsi_cmnd *cmd)
{
return sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
}
struct scsi_target *starget = scsi_target(cmd->device);
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
struct sym_data *sym_data = shost_priv(shost);
struct pci_dev *pdev = sym_data->pdev;
struct sym_hcb *np = sym_data->ncb;
SYM_QUEHEAD *qp;
int sts;
struct completion eh_done;
static int sym53c8xx_eh_device_reset_handler(struct scsi_cmnd *cmd)
{
return sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
starget_printk(KERN_WARNING, starget,
"TARGET RESET operation started\n");
/*
* Escalate to host reset if the PCI bus went down
*/
if (pci_channel_offline(pdev))
return SCSI_FAILED;
spin_lock_irq(shost->host_lock);
sts = sym_reset_scsi_target(np, starget->id);
if (!sts) {
FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb,
link_ccbq);
struct scsi_cmnd *cmd = cp->cmd;
struct sym_ucmd *ucmd;
if (!cmd || cmd->device->channel != starget->channel ||
cmd->device->id != starget->id)
continue;
ucmd = SYM_UCMD_PTR(cmd);
init_completion(&eh_done);
ucmd->eh_done = &eh_done;
spin_unlock_irq(shost->host_lock);
if (!wait_for_completion_timeout(&eh_done, 5*HZ)) {
ucmd->eh_done = NULL;
sts = -2;
}
spin_lock_irq(shost->host_lock);
}
}
spin_unlock_irq(shost->host_lock);
starget_printk(KERN_WARNING, starget, "TARGET RESET operation %s.\n",
sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
return SCSI_SUCCESS;
}
static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd)
@ -1660,7 +1688,7 @@ static const struct scsi_host_template sym2_template = {
.slave_configure = sym53c8xx_slave_configure,
.slave_destroy = sym53c8xx_slave_destroy,
.eh_abort_handler = sym53c8xx_eh_abort_handler,
.eh_device_reset_handler = sym53c8xx_eh_device_reset_handler,
.eh_target_reset_handler = sym53c8xx_eh_target_reset_handler,
.eh_bus_reset_handler = sym53c8xx_eh_bus_reset_handler,
.eh_host_reset_handler = sym53c8xx_eh_host_reset_handler,
.this_id = 7,