igb: only disable/enable interrupt bits for igb physical function

The igb_irq_disable/enable calls were causing virtual functions associated
with the igb physical function to have their interrupts disabled.  In order
to prevent this from occuring we should only clear/set the bits related to
the physical function.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index 95089a8..1d03fcb 100644 (file)
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -821,9 +821,11 @@ static void igb_irq_disable(struct igb_adapter *adapter)
        struct e1000_hw *hw = &adapter->hw;
 
        if (adapter->msix_entries) {
-               wr32(E1000_EIAM, 0);
-               wr32(E1000_EIMC, ~0);
-               wr32(E1000_EIAC, 0);
+               u32 regval = rd32(E1000_EIAM);
+               wr32(E1000_EIAM, regval & ~adapter->eims_enable_mask);
+               wr32(E1000_EIMC, adapter->eims_enable_mask);
+               regval = rd32(E1000_EIAC);
+               wr32(E1000_EIAC, regval & ~adapter->eims_enable_mask);
        }
 
        wr32(E1000_IAM, 0);
@@ -841,8 +843,10 @@ static void igb_irq_enable(struct igb_adapter *adapter)
        struct e1000_hw *hw = &adapter->hw;
 
        if (adapter->msix_entries) {
-               wr32(E1000_EIAC, adapter->eims_enable_mask);
-               wr32(E1000_EIAM, adapter->eims_enable_mask);
+               u32 regval = rd32(E1000_EIAC);
+               wr32(E1000_EIAC, regval | adapter->eims_enable_mask);
+               regval = rd32(E1000_EIAM);
+               wr32(E1000_EIAM, regval | adapter->eims_enable_mask);
                wr32(E1000_EIMS, adapter->eims_enable_mask);
                if (adapter->vfs_allocated_count)
                        wr32(E1000_MBVFIMR, 0xFF);