Re: [PATCH] wifi: ath12k: extend dma mask to 36 bits

[Johan Hovold]

On Wed, Mar 26, 2025 at 08:11:11AM -0700, Jeff Johnson wrote:
> On 3/21/2025 9:23 AM, Johan Hovold wrote:
> > Extend the DMA mask to 36 bits to avoid using bounce buffers on machines
> > without an iommu (under OS control) similar to what was done for ath11k
> > in commit dbd73acb22d8 ("wifi: ath11k: enable 36 bit mask for stream
> > DMA").
> > 
> > This specifically avoids using bounce buffers on Qualcomm Snapdragon X
> > Elite machines like the Lenovo ThinkPad T14s when running at EL1.
> > 
> > Note that the mask could possibly be extended further but unresolved DMA
> > issues with 64 GiB X Elite machines currently prevents that from being
> > tested.
> > 
> > Also note that the driver is limited to 32 bits for coherent
> > allocations and that there is no need to check for errors when setting
> > masks larger than 32 bits.
> > 
> > Tested-on: WCN7850 hw2.0 WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3
> > 
> > Signed-off-by: Johan Hovold <johan+linaro@xxxxxxxxxx>
> > ---
> 
> Please make sure to include linux-wireless for all ath.git patches so that
> they are processed by patchwork.kernel.org

Ok, I'll try to remember that, but it seems you need to update
MAINTAINERS to include that list:

	$ scripts/get_maintainer.pl 0001-wifi-ath12k-extend-dma-mask-to-36-bits.patch 
	Jeff Johnson <jjohnson@xxxxxxxxxx> (supporter:QUALCOMM ATH12K WIRELESS DRIVER)
	ath12k@xxxxxxxxxxxxxxxxxxx (open list:QUALCOMM ATH12K WIRELESS DRIVER)
	linux-kernel@xxxxxxxxxxxxxxx (open list)

Do you want me to resend?

Johan