linux-kernel - Re: [PATCH v2 4/5] mwifiex: Send DELBA requests according to spec

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Message-ID: <20211016142809.tjezv4dpxrlmdp6v@pali>
Date:   Sat, 16 Oct 2021 16:28:09 +0200
From:   Pali Rohár <pali@...nel.org>
To:     Jonas Dreßler <verdre@...d.nl>
Cc:     Amitkumar Karwar <amitkarwar@...il.com>,
        Ganapathi Bhat <ganapathi017@...il.com>,
        Xinming Hu <huxinming820@...il.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Tsuchiya Yuto <kitakar@...il.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Maximilian Luz <luzmaximilian@...il.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>
Subject: Re: [PATCH v2 4/5] mwifiex: Send DELBA requests according to spec

On Saturday 16 October 2021 12:36:55 Jonas Dreßler wrote:
> While looking at on-air packets using Wireshark, I noticed we're never
> setting the initiator bit when sending DELBA requests to the AP: While
> we set the bit on our del_ba_param_set bitmask, we forget to actually
> copy that bitmask over to the command struct, which means we never
> actually set the initiator bit.
> 
> Fix that and copy the bitmask over to the host_cmd_ds_11n_delba command
> struct.
> 
> Signed-off-by: Jonas Dreßler <verdre@...d.nl>

Hello! This looks like is fixing mwifiex_send_delba() function which was
added in initial mwifiex commit. So probably it should have following
tag:

Fixes: 5e6e3a92b9a4 ("wireless: mwifiex: initial commit for Marvell mwifiex driver")

> ---
>  drivers/net/wireless/marvell/mwifiex/11n.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/wireless/marvell/mwifiex/11n.c b/drivers/net/wireless/marvell/mwifiex/11n.c
> index b0695432b26a..9ff2058bcd7e 100644
> --- a/drivers/net/wireless/marvell/mwifiex/11n.c
> +++ b/drivers/net/wireless/marvell/mwifiex/11n.c
> @@ -657,14 +657,15 @@ int mwifiex_send_delba(struct mwifiex_private *priv, int tid, u8 *peer_mac,
>  	uint16_t del_ba_param_set;
>  
>  	memset(&delba, 0, sizeof(delba));
> -	delba.del_ba_param_set = cpu_to_le16(tid << DELBA_TID_POS);
>  
> -	del_ba_param_set = le16_to_cpu(delba.del_ba_param_set);
> +	del_ba_param_set = tid << DELBA_TID_POS;
> +
>  	if (initiator)
>  		del_ba_param_set |= IEEE80211_DELBA_PARAM_INITIATOR_MASK;
>  	else
>  		del_ba_param_set &= ~IEEE80211_DELBA_PARAM_INITIATOR_MASK;
>  
> +	delba.del_ba_param_set = cpu_to_le16(del_ba_param_set);
>  	memcpy(&delba.peer_mac_addr, peer_mac, ETH_ALEN);
>  
>  	/* We don't wait for the response of this command */
> -- 
> 2.31.1
>