Felix Fietkau <nbd@xxxxxxxx> wrote:
> If mcu_skb_prepare_msg is not implemented, incrementing skb refcount does not
> work for mcu message retry. In some cases (e.g. on SDIO), shared skbs can trigger
> a BUG_ON, crashing the system.
> Fix this by only incrementing refcount if retry is actually supported.
>
> Fixes: 3688c18b65ae ("wifi: mt76: mt7915: retry mcu messages")
> Closes: https://lore.kernel.org/r/d907b13a-f8be-4cb8-a0bb-560a21278041@notapiano/
> Reported-by: Nícolas F. R. A. Prado <nfraprado@xxxxxxxxxxxxx> #KernelCI
> Tested-by: Alper Nebi Yasak <alpernebiyasak@xxxxxxxxx>
> Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
Patch applied to wireless.git, thanks.
34b695481084 wifi: mt76: do not increase mcu skb refcount if retry is not supported
--
https://patchwork.kernel.org/project/linux-wireless/patch/20240917110942.22077-1-nbd@xxxxxxxx/
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
