Messages in this thread Patch in this message | | | From | Sasha Levin <> | Subject | [PATCH AUTOSEL 3.18 44/61] igb: Fix an issue that PME is not enabled during runtime suspend | Date | Mon, 28 Jan 2019 11:26:06 -0500 |
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From: Kai-Heng Feng <kai.heng.feng@canonical.com>
[ Upstream commit 1fb3a7a75e2efcc83ef21f2434069cddd6fae6f5 ]
I210 ethernet card doesn't wakeup when a cable gets plugged. It's because its PME is not set.
Since commit 42eca2302146 ("PCI: Don't touch card regs after runtime suspend D3"), if the PCI state is saved, pci_pm_runtime_suspend() stops calling pci_finish_runtime_suspend(), which enables the PCI PME.
To fix the issue, let's not to save PCI states when it's runtime suspend, to let the PCI subsystem enables PME.
Fixes: 42eca2302146 ("PCI: Don't touch card regs after runtime suspend D3") Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Tested-by: Aaron Brown <aaron.f.brown@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/net/ethernet/intel/igb/igb_main.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index b73c896ed184..390d96ae4147 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -7351,9 +7351,11 @@ static int __igb_shutdown(struct pci_dev *pdev, bool *enable_wake, rtnl_unlock(); #ifdef CONFIG_PM - retval = pci_save_state(pdev); - if (retval) - return retval; + if (!runtime) { + retval = pci_save_state(pdev); + if (retval) + return retval; + } #endif status = rd32(E1000_STATUS); -- 2.19.1
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