diff options
Diffstat (limited to 'drivers/net/ethernet/intel/igb/igb_main.c')
| -rw-r--r-- | drivers/net/ethernet/intel/igb/igb_main.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index f623e6ce28c9..e8b4f7b3f03f 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -751,6 +751,28 @@ static void igb_cache_ring_register(struct igb_adapter *adapter) } } +u32 igb_rd32(struct e1000_hw *hw, u32 reg) +{ + struct igb_adapter *igb = container_of(hw, struct igb_adapter, hw); + u8 __iomem *hw_addr = ACCESS_ONCE(hw->hw_addr); + u32 value = 0; + + if (E1000_REMOVED(hw_addr)) + return ~value; + + value = readl(&hw_addr[reg]); + + /* reads should not return all F's */ + if (!(~value) && (!reg || !(~readl(hw_addr)))) { + struct net_device *netdev = igb->netdev; + hw->hw_addr = NULL; + netif_device_detach(netdev); + netdev_err(netdev, "PCIe link lost, device now detached\n"); + } + + return value; +} + /** * igb_write_ivar - configure ivar for given MSI-X vector * @hw: pointer to the HW structure |