linux-kernel - [PATCH RFC 59/77] qla2xxx: Update MSI/MSI-X interrupts enablement code

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Message-Id: <54f6b89372f51cd27a6adf6ecc91b8bf6bb5ba74.1380703263.git.agordeev@redhat.com>
Date:	Wed,  2 Oct 2013 12:49:15 +0200
From:	Alexander Gordeev <agordeev@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	Alexander Gordeev <agordeev@...hat.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Ralf Baechle <ralf@...ux-mips.org>,
	Michael Ellerman <michael@...erman.id.au>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Ingo Molnar <mingo@...hat.com>, Tejun Heo <tj@...nel.org>,
	Dan Williams <dan.j.williams@...el.com>,
	Andy King <acking@...are.com>, Jon Mason <jon.mason@...el.com>,
	Matt Porter <mporter@...nel.crashing.org>,
	linux-pci@...r.kernel.org, linux-mips@...ux-mips.org,
	linuxppc-dev@...ts.ozlabs.org, linux390@...ibm.com,
	linux-s390@...r.kernel.org, x86@...nel.org,
	linux-ide@...r.kernel.org, iss_storagedev@...com,
	linux-nvme@...ts.infradead.org, linux-rdma@...r.kernel.org,
	netdev@...r.kernel.org, e1000-devel@...ts.sourceforge.net,
	linux-driver@...gic.com,
	Solarflare linux maintainers <linux-net-drivers@...arflare.com>,
	"VMware, Inc." <pv-drivers@...are.com>, linux-scsi@...r.kernel.org
Subject: [PATCH RFC 59/77] qla2xxx: Update MSI/MSI-X interrupts enablement code

As result of recent re-design of the MSI/MSI-X interrupts enabling
pattern this driver has to be updated to use the new technique to
obtain a optimal number of MSI/MSI-X interrupts required.

Signed-off-by: Alexander Gordeev <agordeev@...hat.com>
---
 drivers/scsi/qla2xxx/qla_isr.c |   18 +++++++++++-------
 1 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index df1b30b..6c11ab9 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -2836,16 +2836,20 @@ qla24xx_enable_msix(struct qla_hw_data *ha, struct rsp_que *rsp)
 	for (i = 0; i < ha->msix_count; i++)
 		entries[i].entry = i;
 
-	ret = pci_enable_msix(ha->pdev, entries, ha->msix_count);
-	if (ret) {
+	ret = pci_msix_table_size(ha->pdev);
+	if (ret < 0) {
+		goto msix_failed;
+	} else {
 		if (ret < MIN_MSIX_COUNT)
 			goto msix_failed;
 
-		ql_log(ql_log_warn, vha, 0x00c6,
-		    "MSI-X: Failed to enable support "
-		    "-- %d/%d\n Retry with %d vectors.\n",
-		    ha->msix_count, ret, ret);
-		ha->msix_count = ret;
+		if (ret < ha->msix_count) {
+			ql_log(ql_log_warn, vha, 0x00c6,
+			    "MSI-X: Failed to enable support "
+			    "-- %d/%d\n Retry with %d vectors.\n",
+			    ha->msix_count, ret, ret);
+			ha->msix_count = ret;
+		}
 		ret = pci_enable_msix(ha->pdev, entries, ha->msix_count);
 		if (ret) {
 msix_failed:
-- 
1.7.7.6

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