linux-kernel - [PATCH] virtio: Use pci_enable_msix_range() instead of pci_enable

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Date:	Wed, 19 Feb 2014 11:15:29 +0100
From:	Alexander Gordeev <agordeev@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	Alexander Gordeev <agordeev@...hat.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	virtio-dev@...ts.oasis-open.org,
	virtualization@...ts.linux-foundation.org,
	linux-pci@...r.kernel.org
Subject: [PATCH] virtio: Use pci_enable_msix_range() instead of pci_enable_msix()

As result deprecation of MSI-X/MSI enablement functions
pci_enable_msix() and pci_enable_msi_block() all drivers
using these two interfaces need to be updated to use the
new pci_enable_msi_range() and pci_enable_msix_range()
interfaces.

Signed-off-by: Alexander Gordeev <agordeev@...hat.com>
Cc: Rusty Russell <rusty@...tcorp.com.au>
Cc: "Michael S. Tsirkin" <mst@...hat.com>
Cc: virtio-dev@...ts.oasis-open.org
Cc: virtualization@...ts.linux-foundation.org
Cc: linux-pci@...r.kernel.org
---
 drivers/virtio/virtio_pci.c |    8 +++-----
 1 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/virtio/virtio_pci.c b/drivers/virtio/virtio_pci.c
index a416f9b..dea042c 100644
--- a/drivers/virtio/virtio_pci.c
+++ b/drivers/virtio/virtio_pci.c
@@ -333,11 +333,9 @@ static int vp_request_msix_vectors(struct virtio_device *vdev, int nvectors,
 	for (i = 0; i < nvectors; ++i)
 		vp_dev->msix_entries[i].entry = i;
 
-	/* pci_enable_msix returns positive if we can't get this many. */
-	err = pci_enable_msix(vp_dev->pci_dev, vp_dev->msix_entries, nvectors);
-	if (err > 0)
-		err = -ENOSPC;
-	if (err)
+	err = pci_enable_msix_range(vp_dev->pci_dev,
+				    vp_dev->msix_entries, nvectors, nvectors);
+	if (err < 0)
 		goto error;
 	vp_dev->msix_enabled = 1;
 
-- 
1.7.7.6

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