From: Kai-Heng Feng <kai.heng.feng@canonical.com>
To: jeffrey.t.kirsher@intel.com
Cc: davem@davemloft.net, intel-wired-lan@lists.osuosl.org,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
Kai-Heng Feng <kai.heng.feng@canonical.com>
Subject: [PATCH] igb: Fix an issue that PME is not enabled during runtime suspend
Date: Mon, 3 Dec 2018 13:54:38 +0800 [thread overview]
Message-ID: <20181203055438.363-1-kai.heng.feng@canonical.com> (raw)
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 subsytem 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>
---
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 5df88ad8ac81..93f150784cfc 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -8770,9 +8770,11 @@ 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);
--
2.17.1
next reply other threads:[~2018-12-03 5:54 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-03 5:54 Kai-Heng Feng [this message]
2018-12-12 3:24 ` [Intel-wired-lan] [PATCH] igb: Fix an issue that PME is not enabled during runtime suspend Brown, Aaron F
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