diff options
| author | Kai-Heng Feng <kai.heng.feng@canonical.com> | 2021-12-24 09:19:14 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-12-27 13:19:51 +0100 |
| commit | f4dd5174e2739ab0aeda14b32847e587e78ff3d9 (patch) | |
| tree | 27c6fae32aa753dd8328d6dffeafee14dc642592 /drivers/net/wwan | |
| parent | net: wwan: iosm: Let PCI core handle PCI power transition (diff) | |
| download | linux-f4dd5174e2739ab0aeda14b32847e587e78ff3d9.tar.xz linux-f4dd5174e2739ab0aeda14b32847e587e78ff3d9.zip | |
net: wwan: iosm: Keep device at D0 for s2idle case
We are seeing spurious wakeup caused by Intel 7560 WWAN on AMD laptops.
This prevent those laptops to stay in s2idle state.
>From what I can understand, the intention of ipc_pcie_suspend() is to
put the device to D3cold, and ipc_pcie_suspend_s2idle() is to keep the
device at D0. However, the device can still be put to D3hot/D3cold by
PCI core.
So explicitly let PCI core know this device should stay at D0, to solve
the spurious wakeup.
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/wwan')
| -rw-r--r-- | drivers/net/wwan/iosm/iosm_ipc_pcie.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/wwan/iosm/iosm_ipc_pcie.c b/drivers/net/wwan/iosm/iosm_ipc_pcie.c index d73894e2a84e..af1d0e837fe9 100644 --- a/drivers/net/wwan/iosm/iosm_ipc_pcie.c +++ b/drivers/net/wwan/iosm/iosm_ipc_pcie.c @@ -340,6 +340,9 @@ static int __maybe_unused ipc_pcie_suspend_s2idle(struct iosm_pcie *ipc_pcie) ipc_imem_pm_s2idle_sleep(ipc_pcie->imem, true); + /* Let PCI core know this device should stay at D0 */ + pci_save_state(ipc_pcie->pci); + return 0; } |