net: wwan: iosm: Keep device at D0 for s2idle case

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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>

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Kai-Heng Feng 2021-12-24 16:19:14 +08:00 • committed by David S. Miller

parent 8f58e29ed7

commit f4dd5174e2

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drivers/net/wwan/iosm/iosm_ipc_pcie.c

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