wifi: ath10k: Use RMW accessors for changing LNKCTL

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[ Upstream commit f139492a09 ]

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 does 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: 76d870ed09 ("ath10k: enable ASPM")
Link: https://lore.kernel.org/r/20230717120503.15276-11-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 15:05:02 +03:00 • committed by Greg Kroah-Hartman

parent f8dca9806d

commit 847ee94d82

1 changed files with 5 additions and 4 deletions

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drivers/net/wireless/ath/ath10k/pci.c

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