[PATCH v3 09/10] wifi: ath12k: Use RMW accessors for changing LNKCTL
Simon Horman
simon.horman at corigine.com
Wed Jun 21 07:47:36 PDT 2023
On Tue, Jun 20, 2023 at 04:46:23PM +0300, Ilpo Järvinen wrote:
> 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.
>
> Fixes: d889913205cf ("wifi: ath12k: driver for Qualcomm Wi-Fi 7 devices")
> Suggested-by: Lukas Wunner <lukas at wunner.de>
> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen at linux.intel.com>
> Acked-by: Kalle Valo <kvalo at kernel.org>
> Cc: stable at vger.kernel.org
> ---
> drivers/net/wireless/ath/ath12k/pci.c | 10 ++++++----
> 1 file changed, 6 insertions(+), 4 deletions(-)
Reviewed-by: Simon Horman <simon.horman at corigine.com>
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