Commit 7eb3ccd8 authored by Tyrel Datwyler's avatar Tyrel Datwyler Committed by Martin K. Petersen
Browse files

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

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: default avatarBrian King <brking@linux.vnet.ibm.com>
Signed-off-by: default avatarTyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent a835f386

drivers/scsi/ibmvscsi/ibmvfc.c

+16 −0
Original line number Diff line number Diff line
@@ -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);

	}

}



/**