linux-kernel - Re: [Outreachy kernel] [PATCH v2] Staging: rtl8723bs: rtw

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Message-ID: <20200315222723.666470f7@elisabeth>
Date:   Sun, 15 Mar 2020 22:27:23 +0100
From:   Stefano Brivio <sbrivio@...hat.com>
To:     Shreeya Patel <shreeya.patel23498@...il.com>
Cc:     gregkh@...uxfoundation.org, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org, outreachy-kernel@...glegroups.com,
        daniel.baluta@...il.com, nramas@...ux.microsoft.com,
        hverkuil@...all.nl, Larry.Finger@...inger.net
Subject: Re: [Outreachy kernel] [PATCH v2] Staging: rtl8723bs: rtw_mlme:
 Remove unnecessary conditions

On Fri, 13 Mar 2020 15:59:12 +0530
Shreeya Patel <shreeya.patel23498@...il.com> wrote:

> Remove unnecessary if and else conditions since both are leading to the
> initialization of "phtpriv->ampdu_enable" with the same value.
> Also, remove the unnecessary else-if condition since it does nothing.
> 
> Signed-off-by: Shreeya Patel <shreeya.patel23498@...il.com>
> ---
> 
> Changes in v2
>   - Remove unnecessary comments
>   - Remove unnecessary else-if condition which does nothing.
> 
>  drivers/staging/rtl8723bs/core/rtw_mlme.c | 11 +----------
>  1 file changed, 1 insertion(+), 10 deletions(-)
> 
> diff --git a/drivers/staging/rtl8723bs/core/rtw_mlme.c b/drivers/staging/rtl8723bs/core/rtw_mlme.c
> index 71fcb466019a..d7a58af76ea0 100644
> --- a/drivers/staging/rtl8723bs/core/rtw_mlme.c
> +++ b/drivers/staging/rtl8723bs/core/rtw_mlme.c
> @@ -2772,16 +2772,7 @@ void rtw_update_ht_cap(struct adapter *padapter, u8 *pie, uint ie_len, u8 channe
>  
>  	/* maybe needs check if ap supports rx ampdu. */
>  	if (!(phtpriv->ampdu_enable) && pregistrypriv->ampdu_enable == 1) {
> -		if (pregistrypriv->wifi_spec == 1) {
> -			/* remove this part because testbed AP should disable RX AMPDU */
> -			/* phtpriv->ampdu_enable = false; */
> -			phtpriv->ampdu_enable = true;
> -		} else {
> -			phtpriv->ampdu_enable = true;
> -		}
> -	} else if (pregistrypriv->ampdu_enable == 2) {
> -		/* remove this part because testbed AP should disable RX AMPDU */
> -		/* phtpriv->ampdu_enable = true; */
> +		phtpriv->ampdu_enable = true;

I suspect this is actually a bug, that is:

os_dep/os_intfs.c:74:static int rtw_ampdu_enable = 1;/* for enable tx_ampdu ,0: disable, 0x1:enable (but wifi_spec should be 0), 0x2: force enable (don't care wifi_spec) */

and that seems to actually map to the ampdu_enable field in
pregistrypriv.

However, I wouldn't change this without testing it on the actual
hardware, change looks good to me and doesn't affect functionality,

Reviewed-by: Stefano Brivio <sbrivio@...hat.com>

-- 
Stefano