netxen: improve msi support

Recent netxen firmware has new scheme of generating MSI interrupts, it
raises interrupt and blocks itself, waiting for driver to unmask. This
reduces chance of spurious interrupts.

The driver will be able to deal with older firmware as well.

Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Tested-by: Vernon Mauery <mauery@us.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/net/netxen/netxen_nic.h b/drivers/net/netxen/netxen_nic.h
index 2bc5eaae141f..876cd0635f2e 100644
--- a/drivers/net/netxen/netxen_nic.h
+++ b/drivers/net/netxen/netxen_nic.h
@@ -942,6 +942,7 @@ struct netxen_adapter {
         struct pci_dev *ctx_desc_pdev;
         dma_addr_t ctx_desc_phys_addr;
         int intr_scheme;
+        int msi_mode;
         int (*enable_phy_interrupts) (struct netxen_adapter *);
         int (*disable_phy_interrupts) (struct netxen_adapter *);
         void (*handle_phy_intr) (struct netxen_adapter *);