From: Brian King <brking@linux.vnet.ibm.com>
Date: Thu, 18 Jun 2009 14:06:52 +0000 (-0500)
Subject: ibmvfc: Process async events before command responses
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=f1d7fb7a8ab55357b6c7d44a53f644a043680ed1;p=deliverable%2Flinux.git

ibmvfc: Process async events before command responses

Since async events could indicate changes to link status, or
events which could affect decisions made during discovery, we should
process async events prior to command completion responses.

Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
---

diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c
index b4b805e8d7db..497a4cc4d9ef 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc.c
@@ -2783,27 +2783,27 @@ static void ibmvfc_tasklet(void *data)
 
 	spin_lock_irqsave(vhost->host->host_lock, flags);
 	while (!done) {
-		/* Pull all the valid messages off the CRQ */
-		while ((crq = ibmvfc_next_crq(vhost)) != NULL) {
-			ibmvfc_handle_crq(crq, vhost);
-			crq->valid = 0;
-		}
-
 		/* Pull all the valid messages off the async CRQ */
 		while ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
 			ibmvfc_handle_async(async, vhost);
 			async->valid = 0;
 		}
 
-		vio_enable_interrupts(vdev);
-		if ((crq = ibmvfc_next_crq(vhost)) != NULL) {
-			vio_disable_interrupts(vdev);
+		/* Pull all the valid messages off the CRQ */
+		while ((crq = ibmvfc_next_crq(vhost)) != NULL) {
 			ibmvfc_handle_crq(crq, vhost);
 			crq->valid = 0;
-		} else if ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
+		}
+
+		vio_enable_interrupts(vdev);
+		if ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
 			vio_disable_interrupts(vdev);
 			ibmvfc_handle_async(async, vhost);
 			async->valid = 0;
+		} else if ((crq = ibmvfc_next_crq(vhost)) != NULL) {
+			vio_disable_interrupts(vdev);
+			ibmvfc_handle_crq(crq, vhost);
+			crq->valid = 0;
 		} else
 			done = 1;
 	}