Re: [PATCH v2] staging: rtl8723bs: Use % 4096 instead of & 0xfff

Julia Lawall
2025-04-05T00:33:45Z

On Sat, 5 Apr 2025, Abraham Samuel Adekunle wrote:

> Replace the bitwise AND operator `&` with a modulo
> operator `%` and decimal number to make the upper limit visible
> and clear what the semantic of it is.

I think that the & and the Fs are more understandable than using the % and
4096. I would say no for this idea.

> Also add white spaces around binary operators for improved
> readabiity and adherence to Linux kernel coding style.

The "Also" is a hint that you are doing two things. So they can be in two
different patches.

julia

>
> Suggested-by Andy Shevchenko <andy.shevchenko@gmail.com>
>
> Signed-off-by: Abraham Samuel Adekunle <abrahamadekunle50@gmail.com>
> ---
> Changes in v1:
> - Added more patch recipients.
>
> drivers/staging/rtl8723bs/core/rtw_xmit.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/staging/rtl8723bs/core/rtw_xmit.c b/drivers/staging/rtl8723bs/core/rtw_xmit.c
> index 297c93d65315..630669193be4 100644
> --- a/drivers/staging/rtl8723bs/core/rtw_xmit.c
> +++ b/drivers/staging/rtl8723bs/core/rtw_xmit.c
> @@ -943,7 +943,7 @@ s32 rtw_make_wlanhdr(struct adapter *padapter, u8 *hdr, struct pkt_attrib *pattr
>
> if (psta) {
> psta->sta_xmitpriv.txseq_tid[pattrib->priority]++;
> - psta->sta_xmitpriv.txseq_tid[pattrib->priority] &= 0xFFF;
> + psta->sta_xmitpriv.txseq_tid[pattrib->priority] %= 4096;
> pattrib->seqnum = psta->sta_xmitpriv.txseq_tid[pattrib->priority];
>
> SetSeqNum(hdr, pattrib->seqnum);
> @@ -963,11 +963,11 @@ s32 rtw_make_wlanhdr(struct adapter *padapter, u8 *hdr, struct pkt_attrib *pattr
> if (SN_LESS(pattrib->seqnum, tx_seq)) {
> pattrib->ampdu_en = false;/* AGG BK */
> } else if (SN_EQUAL(pattrib->seqnum, tx_seq)) {
> - psta->BA_starting_seqctrl[pattrib->priority & 0x0f] = (tx_seq+1)&0xfff;
> + psta->BA_starting_seqctrl[pattrib->priority & 0x0f] = (tx_seq + 1) % 4096;
>
> pattrib->ampdu_en = true;/* AGG EN */
> } else {
> - psta->BA_starting_seqctrl[pattrib->priority & 0x0f] = (pattrib->seqnum+1)&0xfff;
> + psta->BA_starting_seqctrl[pattrib->priority & 0x0f] = (pattrib->seqnum + 1) % 4096;
> pattrib->ampdu_en = true;/* AGG EN */
> }
> }
> --
> 2.34.1
>
>