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[net-next,08/10] igb: don't allow SR-IOV without MSI-X

Message ID 1372244122-17664-9-git-send-email-jeffrey.t.kirsher@intel.com
State Changes Requested, archived
Delegated to: David Miller
Headers show

Commit Message

Kirsher, Jeffrey T June 26, 2013, 10:55 a.m. UTC 
From: Mitch A Williams <mitch.a.williams@intel.com>

MSI-X interrupts are required for SR-IOV operation. Check to make sure
they're enabled before allowing the user to turn on VFs.

Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/igb/igb_main.c | 5 +++++
 1 file changed, 5 insertions(+)
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Patch

diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index c74ad78..35d31c6 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -2438,6 +2438,11 @@  static int igb_enable_sriov(struct pci_dev *pdev, int num_vfs)
 	int err = 0;
 	int i;
 
+	if (!adapter->msix_entries) {
+		err = -EPERM;
+		goto out;
+	}
+
 	if (!num_vfs)
 		goto out;
 	else if (old_vfs && old_vfs == num_vfs)