提交 3b24e9f8 编写于 作者: S Sujith Manoharan 提交者: John W. Linville

ath9k: Fix possible overflow condition

Prevent a possible overflow condition which results in occasional
bad IQ coefficients and EVM numbers.
Signed-off-by: NSujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
上级 522aaa18
......@@ -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");
......
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