[dpdk-dev] [PATCH] net/virtio: fix wrong use_msix value for legacy device

Zhiyong Yang zhiyong.yang at intel.com
Wed Dec 27 11:09:25 CET 2017


If virtio fails to detect modern device, use_misx should be reset
to VIRTIO_MSIX_NONE, otherwise this wrong value will be used after
legacy device detection succeeds to be done.

Fixes: fe19d49cb525 ("net/virtio: fix Rx interrupt with VFIO")
Cc: stable at dpdk.org
Signed-off-by: Zhiyong Yang <zhiyong.yang at intel.com>
---
 drivers/net/virtio/virtio_pci.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/virtio/virtio_pci.c b/drivers/net/virtio/virtio_pci.c
index 9574498fb..5582238fd 100644
--- a/drivers/net/virtio/virtio_pci.c
+++ b/drivers/net/virtio/virtio_pci.c
@@ -695,6 +695,7 @@ vtpci_init(struct rte_pci_device *dev, struct virtio_hw *hw)
 		return 0;
 	}
 
+	hw->use_msix = VIRTIO_MSIX_NONE;
 	PMD_INIT_LOG(INFO, "trying with legacy virtio pci.");
 	if (rte_pci_ioport_map(dev, 0, VTPCI_IO(hw)) < 0) {
 		if (dev->kdrv == RTE_KDRV_UNKNOWN &&
-- 
2.13.3



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