| Message ID | 20240801101531.6626-1-d.kandybka@gmail.com |
|---|---|
| State | New |
| Headers | show |
| Series | wifi: brcmsmac: clean up unnecessary current_ampdu_cnt and related checks | expand |
On August 1, 2024 12:15:35 PM Dmitry Kandybka <d.kandybka@gmail.com> wrote: > In 'brcms_c_ffpld_check_txfunfl()', 'current_ampdu_cnt' is hardcoded to > zero, so 'txunfl_ratio' is always zero as well and some dead code can be > removed. Compile tested only. > > Found by Linux Verification Center (linuxtesting.org) with SVACE. Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com> > Signed-off-by: Dmitry Kandybka <d.kandybka@gmail.com> > --- > .../broadcom/brcm80211/brcmsmac/ampdu.c | 22 +------------------ > 1 file changed, 1 insertion(+), 21 deletions(-)
Dmitry Kandybka <d.kandybka@gmail.com> wrote: > In 'brcms_c_ffpld_check_txfunfl()', 'current_ampdu_cnt' is hardcoded to > zero, so 'txunfl_ratio' is always zero as well and some dead code can be > removed. Compile tested only. > > Found by Linux Verification Center (linuxtesting.org) with SVACE. > > Signed-off-by: Dmitry Kandybka <d.kandybka@gmail.com> > Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com> Patch applied to wireless-next.git, thanks. 420a549395c2 wifi: brcmsmac: clean up unnecessary current_ampdu_cnt and related checks
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmsmac/ampdu.c b/drivers/net/wireless/broadcom/brcm80211/brcmsmac/ampdu.c index 33d17b779201..a767cbb79185 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmsmac/ampdu.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmsmac/ampdu.c @@ -351,9 +351,7 @@ static int brcms_c_ffpld_check_txfunfl(struct brcms_c_info *wlc, int fid) { struct ampdu_info *ampdu = wlc->ampdu; u32 phy_rate = mcs_2_rate(FFPLD_MAX_MCS, true, false); - u32 txunfl_ratio; u8 max_mpdu; - u32 current_ampdu_cnt = 0; u16 max_pld_size; u32 new_txunfl; struct brcms_fifo_info *fifo = (ampdu->fifo_tb + fid); @@ -389,26 +387,8 @@ static int brcms_c_ffpld_check_txfunfl(struct brcms_c_info *wlc, int fid) if (fifo->accum_txfunfl < 10) return 0; - brcms_dbg_ht(wlc->hw->d11core, "ampdu_count %d tx_underflows %d\n", - current_ampdu_cnt, fifo->accum_txfunfl); + brcms_dbg_ht(wlc->hw->d11core, "tx_underflows %d\n", fifo->accum_txfunfl); - /* - compute the current ratio of tx unfl per ampdu. - When the current ampdu count becomes too - big while the ratio remains small, we reset - the current count in order to not - introduce too big of a latency in detecting a - large amount of tx underflows later. - */ - - txunfl_ratio = current_ampdu_cnt / fifo->accum_txfunfl; - - if (txunfl_ratio > ampdu->tx_max_funl) { - if (current_ampdu_cnt >= FFPLD_MAX_AMPDU_CNT) - fifo->accum_txfunfl = 0; - - return 0; - } max_mpdu = min_t(u8, fifo->mcs2ampdu_table[FFPLD_MAX_MCS], AMPDU_NUM_MPDU_LEGACY);
In 'brcms_c_ffpld_check_txfunfl()', 'current_ampdu_cnt' is hardcoded to zero, so 'txunfl_ratio' is always zero as well and some dead code can be removed. Compile tested only. Found by Linux Verification Center (linuxtesting.org) with SVACE. Signed-off-by: Dmitry Kandybka <d.kandybka@gmail.com> --- .../broadcom/brcm80211/brcmsmac/ampdu.c | 22 +------------------ 1 file changed, 1 insertion(+), 21 deletions(-)