Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 3b24e9f8 authored by Sujith Manoharan's avatar Sujith Manoharan Committed by John W. Linville
Browse files

ath9k: Fix possible overflow condition 



Prevent a possible overflow condition which results in occasional
bad IQ coefficients and EVM numbers.

Signed-off-by: default avatarSujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 522aaa18

drivers/net/wireless/ath/ath9k/ar9003_calib.c

+1 −1
Original line number Diff line number Diff line
@@ -565,7 +565,7 @@ static bool ar9003_hw_solve_iq_cal(struct ath_hw *ah, 
	const s32 result_shift = 1 << 15;

	struct ath_common *common = ath9k_hw_common(ah);



	f2 = (f1 * f1 + f3 * f3) / result_shift;

	f2 = ((f1 >> 3) * (f1 >> 3) + (f3 >> 3) * (f3 >> 3)) >> 9;



	if (!f2) {

		ath_dbg(common, CALIBRATE, "Divide by 0\n");