Re: [PATCH 3/4] ath10k: implement 802.3 SNAP rx decap type A-MSDU handling

[Kalle Valo <kvalo@qca.qualcomm.com>]

Michal Kazior <michal.kazior@tieto.com> writes:

> This enables driver to rx another decapped a-msdu
> frames. It should possibly help with throughputs
> in some cases and reduce (or eliminate) number of
> messages like this:
>
>   ath10k: error processing msdus -524
>
> Signed-off-by: Michal Kazior <michal.kazior@tieto.com>

[...]

> @@ -659,6 +658,15 @@ static int ath10k_htt_rx_amsdu(struct ath10k_htt *htt,
>  			decap_hdr += roundup(crypto_len, 4);
>  		}
>  
> +		if (fmt == RX_MSDU_DECAP_8023_SNAP_LLC) {
> +			/* SNAP 802.3 consists of:
> +			 * [dst:6][src:6][len:2][dsap:1][ssap:1][ctl:1][snap:5]
> +			 * [data][fcs:4].
> +			 *
> +			 * Since this overlaps with A-MSDU header (da, sa, len)
> +			 * there's nothing extra to do. */
> +		}

This block doesn't have any code, is that on purpose? Most likely a
static checker finds this later and we need to remove it.

If your idea is to document the LLC case (which is very good!) it's
better to do everything inside a comment, for example like this:

	/* When fmt == RX_MSDU_DECAP_8023_SNAP_LLC:
         *
         * SNAP 802.3 consists of:
	 * [dst:6][src:6][len:2][dsap:1][ssap:1][ctl:1][snap:5]
	 * [data][fcs:4].
	 *
	 * Since this overlaps with A-MSDU header (da, sa, len)
	 * there's nothing extra to do. */

-- 
Kalle Valo