wifi: ath11k: Use RMW accessors for changing LNKCTL

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[ Upstream commit 6c1b6bdb34 ]

Don't assume that only the driver would be accessing LNKCTL. ASPM policy
changes can trigger write to LNKCTL outside of driver's control.

Use RMW capability accessors which do proper locking to avoid losing
concurrent updates to the register value. On restore, clear the ASPMC field
properly.

Suggested-by: Lukas Wunner <lukas@wunner.de>
Fixes: e9603f4bdc ("ath11k: pci: disable ASPM L0sLs before downloading firmware")
Link: https://lore.kernel.org/r/20230717120503.15276-9-ilpo.jarvinen@linux.intel.com
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Acked-by: Kalle Valo <kvalo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Ilpo Järvinen 2023-07-17 15:05:00 +03:00 • committed by Greg Kroah-Hartman

parent 6eb6602de2

commit 9697dfa899

1 changed files with 6 additions and 4 deletions

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drivers/net/wireless/ath/ath11k/pci.c

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