[PATCH v3 08/10] wifi: ath11k: Use RMW accessors for changing LNKCTL

[Simon Horman]

On Tue, Jun 20, 2023 at 04:46:22PM +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: e9603f4bdcc0 ("ath11k: pci: disable ASPM L0sLs before downloading firmware")
> 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/ath11k/pci.c | 10 ++++++----
>  1 file changed, 6 insertions(+), 4 deletions(-)

Reviewed-by: Simon Horman <simon.horman at corigine.com>