3.16.65-rc1 review patch. If anyone has any objections, please let me know.
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From: Kai-Heng Feng kai.heng.feng@canonical.com
commit 1fb3a7a75e2efcc83ef21f2434069cddd6fae6f5 upstream.
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: Ben Hutchings ben@decadent.org.uk --- drivers/net/ethernet/intel/igb/igb_main.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-)
--- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -7419,9 +7419,11 @@ static int __igb_shutdown(struct pci_dev igb_clear_interrupt_scheme(adapter);
#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);