On Wed, Dec 13, 2023 at 08:14:43AM +0300, Dmitry Antipov wrote:
> In 'rt2x00queue_create_tx_descriptor()', there is no need to call
> 'ieee80211_get_rts_cts_rate()' while checking for RTS/CTS frame
> since this function returns NULL or pointer to internal bitrate
> table entry, and the return value is not actually used. Compile
> tested only.
>
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
>
> Signed-off-by: Dmitry Antipov <dmantipov@xxxxxxxxx>
> ---
> v2: avoid scoped locals (Kalle Valo)
> ---
> drivers/net/wireless/ralink/rt2x00/rt2x00queue.c | 3 ---
> 1 file changed, 3 deletions(-)
>
> diff --git a/drivers/net/wireless/ralink/rt2x00/rt2x00queue.c b/drivers/net/wireless/ralink/rt2x00/rt2x00queue.c
> index 98df0aef8168..013003777fee 100644
> --- a/drivers/net/wireless/ralink/rt2x00/rt2x00queue.c
> +++ b/drivers/net/wireless/ralink/rt2x00/rt2x00queue.c
> @@ -416,9 +416,6 @@ static void rt2x00queue_create_tx_descriptor(struct rt2x00_dev *rt2x00dev,
> __set_bit(ENTRY_TXD_RTS_FRAME, &txdesc->flags);
> else
> __set_bit(ENTRY_TXD_CTS_FRAME, &txdesc->flags);
> - if (tx_info->control.rts_cts_rate_idx >= 0)
> - rate =
> - ieee80211_get_rts_cts_rate(rt2x00dev->hw, tx_info);
> }
So we do not choose rate for RTS/CTS. Maybe we should actually,
but the patch does not change the logic that exist here for
more than 12 years, since
commit 55b585e29095ce64900b6192aadf399fa007161e
Author: Helmut Schaa <helmut.schaa@xxxxxxxxxxxxxx>
Date: Thu Mar 3 19:43:49 2011 +0100
rt2x00: Don't call ieee80211_get_tx_rate for MCS rates
I'm ok with the patch.
Acked-by: Stanislaw Gruszka <stf_xl@xxxxx>
Thanks
Stanislaw
