4 Jun
2025
4 Jun
'25
4:24 p.m.
On 6/3/2025 7:34 PM, Miaoqing Pan wrote:
We previously had extensive discussions on this topic in the https://lore.kernel.org/linux-wireless/ecfe850c-b263-4bee-b888-c34178e690fc@... thread. On my platform, dma_rmb() did not work as expected. The issue only disappeared after disabling PCIe endpoint relaxed ordering in firmware side. So it seems that HP was updated (Memory write) before descriptor (Memory write), which led to the problem.
Have all ath11k and ath12k firmware been updated to prevent this problem from the firmware side?
Or do we need both the barriers and the logic to retry reading the descriptor?