UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

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>
This commit is contained in:
Kai-Heng Feng 2021-12-24 16:19:14 +08:00 committed by David S. Miller
parent 8f58e29ed7
commit f4dd5174e2
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/net/wwan/iosm/iosm_ipc_pcie.c
View File

@ -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;
}