forcedeth: msi interrupt fix

This patch fixes an issue with the suspend/resume cycle with msi
interrupts. See bugzilla number 10487 for more details. The fix is to
re-setup a private msi pci config offset field.

Signed-off-by: Ayaz Abdulla <aabdulla@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/net/forcedeth.c b/drivers/net/forcedeth.c
index da7c9ee069b5..47962ed4b04c 100644
--- a/drivers/net/forcedeth.c
+++ b/drivers/net/forcedeth.c
@@ -589,6 +589,9 @@ union ring_type {
 #define NV_MSI_X_VECTOR_TX    0x1
 #define NV_MSI_X_VECTOR_OTHER 0x2
 
+#define NV_MSI_PRIV_OFFSET 0x68
+#define NV_MSI_PRIV_VALUE  0xffffffff
+
 #define NV_RESTART_TX         0x1
 #define NV_RESTART_RX         0x2
 
@@ -6074,6 +6077,8 @@ static int nv_resume(struct pci_dev *pdev)
         for (i = 0;i <= np->register_size/sizeof(u32); i++)
                 writel(np->saved_config_space[i], base+i*sizeof(u32));
 
+        pci_write_config_dword(pdev, NV_MSI_PRIV_OFFSET, NV_MSI_PRIV_VALUE);
+
         netif_device_attach(dev);
         if (netif_running(dev)) {
                 rc = nv_open(dev);