Commit 08e3cc13 authored by Yury Norov's avatar Yury Norov Committed by Jeff Johnson
Browse files

wifi: carl9170: micro-optimize carl9170_tx_shift_bm() 



The function calls bitmap_empty() just before find_first_bit(). Both
functions are O(N). Because find_first_bit() returns >= nbits in case of
empty bitmap, the bitmap_empty() test may be avoided.

Signed-off-by: default avatarYury Norov <yury.norov@gmail.com>
Acked-by: default avatarChristian Lamparter <chunkeey@gmail.com>
Link: https://patch.msgid.link/20250326155200.39895-1-yury.norov@gmail.com


Signed-off-by: default avatarJeff Johnson <jeff.johnson@oss.qualcomm.com>
parent ac4e317a

drivers/net/wireless/ath/carl9170/tx.c

+1 −2
Original line number Diff line number Diff line
@@ -366,8 +366,7 @@ static void carl9170_tx_shift_bm(struct ar9170 *ar, 
	if (WARN_ON_ONCE(off >= CARL9170_BAW_BITS))

		return;



	if (!bitmap_empty(tid_info->bitmap, off))

		off = find_first_bit(tid_info->bitmap, off);

	off = min(off, find_first_bit(tid_info->bitmap, off));



	tid_info->bsn += off;

	tid_info->bsn &= 0x0fff;