linux-kernel - [PATCH RFC v2 28/29] vmxnet3: Limit number of rx queues to 1 if per-queue MSI-Xs failed

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <48b60dd6eda8df93f1eb8e8356e3c80c673550e3.1382103786.git.agordeev@redhat.com>
Date:	Fri, 18 Oct 2013 19:12:28 +0200
From:	Alexander Gordeev <agordeev@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	Alexander Gordeev <agordeev@...hat.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Michael Ellerman <michael@...erman.id.au>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Tejun Heo <tj@...nel.org>,
	Ben Hutchings <bhutchings@...arflare.com>,
	David Laight <David.Laight@...LAB.COM>,
	Mark Lord <kernel@...rt.ca>, "H. Peter Anvin" <hpa@...or.com>,
	linux-pci@...r.kernel.org
Subject: [PATCH RFC v2 28/29] vmxnet3: Limit number of rx queues to 1 if per-queue MSI-Xs failed

Signed-off-by: Alexander Gordeev <agordeev@...hat.com>
---
 drivers/net/vmxnet3/vmxnet3_drv.c |   18 ++++++++----------
 1 files changed, 8 insertions(+), 10 deletions(-)

diff --git a/drivers/net/vmxnet3/vmxnet3_drv.c b/drivers/net/vmxnet3/vmxnet3_drv.c
index 3df7f32..d33802c 100644
--- a/drivers/net/vmxnet3/vmxnet3_drv.c
+++ b/drivers/net/vmxnet3/vmxnet3_drv.c
@@ -2814,23 +2814,21 @@ vmxnet3_alloc_intr_resources(struct vmxnet3_adapter *adapter)
 
 		err = vmxnet3_acquire_msix_vectors(adapter,
 						   adapter->intr.num_intrs);
-		/* If we cannot allocate one MSIx vector per queue
-		 * then limit the number of rx queues to 1
-		 */
-		if (err == VMXNET3_LINUX_MIN_MSIX_VECT) {
-			if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE
-			    || adapter->num_rx_queues != 1) {
+		if (!err) {
+			/* If we cannot allocate one MSIx vector per queue
+			 * then limit the number of rx queues to 1
+			 */
+			if ((adapter->intr.num_intrs ==
+			     VMXNET3_LINUX_MIN_MSIX_VECT) &&
+			    ((adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) ||
+			     (adapter->num_rx_queues != 1))) {
 				adapter->share_intr = VMXNET3_INTR_TXSHARE;
 				netdev_err(adapter->netdev,
 					   "Number of rx queues : 1\n");
 				adapter->num_rx_queues = 1;
-				adapter->intr.num_intrs =
-						VMXNET3_LINUX_MIN_MSIX_VECT;
 			}
 			return;
 		}
-		if (!err)
-			return;
 
 		/* If we cannot allocate MSIx vectors use only one rx queue */
 		dev_info(&adapter->pdev->dev,
-- 
1.7.7.6

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/