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ixgbe: fix unbalanced device enable/disable in suspend/resume

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commit debb9df311 upstream.

pci_disable_device() called in __ixgbe_shutdown() decreases
dev->enable_cnt by 1. pci_enable_device_mem() which increases
dev->enable_cnt by 1, was removed from ixgbe_resume() in commit
6f82b25587 ("ixgbe: use generic power management"). This caused
unbalanced increase/decrease. So add pci_enable_device_mem() back.

Fix the following call trace.

  ixgbe 0000:17:00.1: disabling already-disabled device
  Call Trace:
   __ixgbe_shutdown+0x10a/0x1e0 [ixgbe]
   ixgbe_suspend+0x32/0x70 [ixgbe]
   pci_pm_suspend+0x87/0x160
   ? pci_pm_freeze+0xd0/0xd0
   dpm_run_callback+0x42/0x170
   __device_suspend+0x114/0x460
   async_suspend+0x1f/0xa0
   async_run_entry_fn+0x3c/0xf0
   process_one_work+0x1dd/0x410
   worker_thread+0x34/0x3f0
   ? cancel_delayed_work+0x90/0x90
   kthread+0x14c/0x170
   ? kthread_park+0x90/0x90
   ret_from_fork+0x1f/0x30

Fixes: 6f82b25587 ("ixgbe: use generic power management")
Signed-off-by: Yongxin Liu <yongxin.liu@windriver.com>
Tested-by: Dave Switzer <david.switzer@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Yongxin Liu 2021-03-22 15:14:48 +08:00 • committed by Greg Kroah-Hartman
commit be07581aac
1 changed files with 5 additions and 0 deletions
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5
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
View file

@ -6896,6 +6896,11 @@ static int __maybe_unused ixgbe_resume(struct device *dev_d)
adapter->hw.hw_addr = adapter->io_addr;
err = pci_enable_device_mem(pdev);
if (err) {
e_dev_err("Cannot enable PCI device from suspend\n");
return err;
}
smp_mb__before_atomic();
clear_bit(__IXGBE_DISABLED, &adapter->state);
pci_set_master(pdev);