@@ -149,6 +149,9 @@ static void igc_release_hw_control(struct igc_adapter *adapter)
struct igc_hw *hw = &adapter->hw;
u32 ctrl_ext;
+ if (!pci_device_is_present(adapter->pdev))
+ return;
+
/* Let firmware take over control of h/w */
ctrl_ext = rd32(IGC_CTRL_EXT);
wr32(IGC_CTRL_EXT,
@@ -4447,26 +4450,29 @@ void igc_down(struct igc_adapter *adapter)
igc_ptp_suspend(adapter);
- /* disable receives in the hardware */
- rctl = rd32(IGC_RCTL);
- wr32(IGC_RCTL, rctl & ~IGC_RCTL_EN);
- /* flush and sleep below */
-
+ if (pci_device_is_present(adapter->pdev)) {
+ /* disable receives in the hardware */
+ rctl = rd32(IGC_RCTL);
+ wr32(IGC_RCTL, rctl & ~IGC_RCTL_EN);
+ /* flush and sleep below */
+ }
/* set trans_start so we don't get spurious watchdogs during reset */
netif_trans_update(netdev);
netif_carrier_off(netdev);
netif_tx_stop_all_queues(netdev);
- /* disable transmits in the hardware */
- tctl = rd32(IGC_TCTL);
- tctl &= ~IGC_TCTL_EN;
- wr32(IGC_TCTL, tctl);
- /* flush both disables and wait for them to finish */
- wrfl();
- usleep_range(10000, 20000);
+ if (pci_device_is_present(adapter->pdev)) {
+ /* disable transmits in the hardware */
+ tctl = rd32(IGC_TCTL);
+ tctl &= ~IGC_TCTL_EN;
+ wr32(IGC_TCTL, tctl);
+ /* flush both disables and wait for them to finish */
+ wrfl();
+ usleep_range(10000, 20000);
- igc_irq_disable(adapter);
+ igc_irq_disable(adapter);
+ }
adapter->flags &= ~IGC_FLAG_NEED_LINK_UPDATE;
@@ -849,7 +849,8 @@ void igc_ptp_suspend(struct igc_adapter *adapter)
adapter->ptp_tx_skb = NULL;
clear_bit_unlock(__IGC_PTP_TX_IN_PROGRESS, &adapter->state);
- igc_ptp_time_save(adapter);
+ if (pci_device_is_present(adapter->pdev))
+ igc_ptp_time_save(adapter);
}
/**
After unplug thunerbolt dock with i225, pciehp interrupt is triggered, remove call will read/write mmio address which is already disconnected, then cause page fault and make system hang. Check PCI state to remove device safely. Trace: BUG: unable to handle page fault for address: 000000000000b604 Oops: 0000 [#1] SMP NOPTI RIP: 0010:igc_rd32+0x1c/0x90 [igc] Call Trace: igc_ptp_suspend+0x6c/0xa0 [igc] igc_ptp_stop+0x12/0x50 [igc] igc_remove+0x7f/0x1c0 [igc] pci_device_remove+0x3e/0xb0 __device_release_driver+0x181/0x240 Signed-off-by: Aaron Ma <aaron.ma@canonical.com> --- drivers/net/ethernet/intel/igc/igc_main.c | 32 ++++++++++++++--------- drivers/net/ethernet/intel/igc/igc_ptp.c | 3 ++- 2 files changed, 21 insertions(+), 14 deletions(-)