netdev - [PATCH RFC 43/77] lpfc: Return -ENOSPC when not enough MSI-X vectors available

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Message-Id: <90e19597e04fa29c5f435d1f43059b69ae7314d4.1380703263.git.agordeev@redhat.com>
Date:	Wed,  2 Oct 2013 12:48:59 +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>,
	stable@...r.kernel.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 43/77] lpfc: Return -ENOSPC when not enough MSI-X vectors available

Signed-off-by: Alexander Gordeev <agordeev@...hat.com>
---
 drivers/scsi/lpfc/lpfc_init.c |   10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index d83a1a3..0ec8008 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -8645,9 +8645,13 @@ lpfc_sli4_enable_msix(struct lpfc_hba *phba)
 		goto msg_fail_out;
 
 	vectors = min(vectors, rc);
-	if (vectors > 1)
-		rc = pci_enable_msix(phba->pcidev, phba->sli4_hba.msix_entries,
-				     vectors);
+	if (vectors < 2) {
+		rc = -ENOSPC;
+		goto msg_fail_out;
+	}
+
+	rc = pci_enable_msix(phba->pcidev, phba->sli4_hba.msix_entries,
+			     vectors);
 	if (rc) {
 msg_fail_out:
 		lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
-- 
1.7.7.6

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