[PATCH] ath10k: cancel rx worker in hif_stop for SDIO

[Kalle Valo]

Wen Gong <wgong at codeaurora.org> writes:

> The rx worker of SDIO should be cancelled after disable interrupt, and
> release rx sk_buff in queue, otherwise the rx worker maybe still run
> after hif_stop. And it should be cancelled before napi_synchronize in
> hif_stop, because the rx worker of SDIO will call napi_schedule, it
> should have no napi_schedule before napi_synchronize, otherwise it
> lead napi_synchronize wait untill napi_complete.
>
> Tested-on: QCA6174 hw3.2 SDIO WLAN.RMH.4.4.1-00049
>
> Signed-off-by: Wen Gong <wgong at codeaurora.org>
> ---
>  drivers/net/wireless/ath/ath10k/sdio.c | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/drivers/net/wireless/ath/ath10k/sdio.c b/drivers/net/wireless/ath/ath10k/sdio.c
> index 81ddaafb6721..2c619ef8a87c 100644
> --- a/drivers/net/wireless/ath/ath10k/sdio.c
> +++ b/drivers/net/wireless/ath/ath10k/sdio.c
> @@ -1962,9 +1962,15 @@ static void ath10k_sdio_hif_stop(struct ath10k *ar)
>  {
>  	struct ath10k_sdio_bus_request *req, *tmp_req;
>  	struct ath10k_sdio *ar_sdio = ath10k_sdio_priv(ar);
> +	struct sk_buff *skb;
>  
>  	ath10k_sdio_irq_disable(ar);
>  
> +	cancel_work_sync(&ar_sdio->async_work_rx);
> +
> +	while (skb = skb_dequeue(&ar_sdio->rx_head))
> +		dev_kfree_skb_any(skb);

This gives a warning:

drivers/net/wireless/ath/ath10k/sdio.c: In function 'ath10k_sdio_hif_stop':
drivers/net/wireless/ath/ath10k/sdio.c:1971:9: warning: suggest parentheses around assignment used as truth value [-Wparentheses]

Fixed in the pending branch.

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