Re: [PATCH] wifi: ath11k: clear shared SRNG pointer state on restart

Baochen Qiang <[email protected]> Thu, 14 May 2026 15:59:00 +0800

Newsgroups	org.infradead.lists.ath11k,org.kernel.vger.linux-kernel,org.kernel.vger.linux-wireless,org.kernel.vger.stable
Message-ID	<[email protected]>


On 5/14/2026 12:52 PM, Kyle Farnung via B4 Relay wrote:
> From: Kyle Farnung <[email protected]>
> 
> LMAC rings reuse the shared rdp/wrp pointer buffers without going
> through the normal SRNG hw-init path that zeros non-LMAC ring
> pointers. After restart, ath11k_hal_srng_clear() can therefore hand
> stale hp/tp state from the previous firmware instance back to the new
> one.
> 
> Clear the shared pointer buffers while keeping the allocations in
> place so restart still avoids reallocating SRNG DMA memory, but starts
> with fresh ring-pointer state.
> 
> Fixes: 32be3ca4cf78b ("wifi: ath11k: HAL SRNG: don't deinitialize and re-initialize again")
> Cc: [email protected]
> Link: https://lore.kernel.org/all/CAOPSVF04q6uvVdq8GTRLHBrVMdpt9=o9wVcFMc6f-yhmSBcZqQ@mail.gmail.com/
> Signed-off-by: Kyle Farnung <[email protected]>

Reviewed-by: Baochen Qiang <[email protected]>