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scsi: ibmvfc: Purge SCSI channels after transport loss/reset

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Grab the queue and list lock for each Sub-CRQ and add any uncompleted
events to the host purge list.

Link: https://lore.kernel.org/r/20210114203148.246656-20-tyreld@linux.ibm.com
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Tyrel Datwyler 2021-01-14 14:31:46 -06:00 committed by Martin K. Petersen
parent a835f386f9
commit 7eb3ccd884
1 changed files with 16 additions and 0 deletions
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16
drivers/scsi/ibmvscsi/ibmvfc.c
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@ -1056,7 +1056,13 @@ static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code)
static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code)
{
struct ibmvfc_event *evt, *pos;
struct ibmvfc_queue *queues = vhost->scsi_scrqs.scrqs;
unsigned long flags;
int hwqs = 0;
int i;
if (vhost->using_channels)
hwqs = vhost->scsi_scrqs.active_queues;
ibmvfc_dbg(vhost, "Purging all requests\n");
spin_lock_irqsave(&vhost->crq.l_lock, flags);
@ -1064,6 +1070,16 @@ static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code)
ibmvfc_fail_request(evt, error_code);
list_splice_init(&vhost->crq.sent, &vhost->purge);
spin_unlock_irqrestore(&vhost->crq.l_lock, flags);
for (i = 0; i < hwqs; i++) {
spin_lock_irqsave(queues[i].q_lock, flags);
spin_lock(&queues[i].l_lock);
list_for_each_entry_safe(evt, pos, &queues[i].sent, queue_list)
ibmvfc_fail_request(evt, error_code);
list_splice_init(&queues[i].sent, &vhost->purge);
spin_unlock(&queues[i].l_lock);
spin_unlock_irqrestore(queues[i].q_lock, flags);
}
}
/**