[PATCH AUTOSEL 4.19 611/671] mt7601u: fix bbp version check in mt7601u_wait_bbp_ready

Sasha Levin sashal at kernel.org
Thu Jan 16 09:04:09 PST 2020

From: Lorenzo Bianconi <lorenzo at kernel.org>

[ Upstream commit 15e14f76f85f4f0eab3b8146e1cd3c58ce272823 ]

Fix bbp ready check in mt7601u_wait_bbp_ready. The issue is reported by
coverity with the following error:

Logical vs. bitwise operator
The expression's value does not depend on the operands; inadvertent use
of the wrong operator is a likely logic error.

Addresses-Coverity-ID: 1309441 ("Logical vs. bitwise operator")
Fixes: c869f77d6abb ("add mt7601u driver")
Acked-by: Jakub Kicinski <kubakici at wp.pl>
Signed-off-by: Lorenzo Bianconi <lorenzo at kernel.org>
Signed-off-by: Kalle Valo <kvalo at codeaurora.org>
Signed-off-by: Sasha Levin <sashal at kernel.org>
 drivers/net/wireless/mediatek/mt7601u/phy.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/mediatek/mt7601u/phy.c b/drivers/net/wireless/mediatek/mt7601u/phy.c
index b804abd464ae..539f78149e43 100644
--- a/drivers/net/wireless/mediatek/mt7601u/phy.c
+++ b/drivers/net/wireless/mediatek/mt7601u/phy.c
@@ -221,7 +221,7 @@ int mt7601u_wait_bbp_ready(struct mt7601u_dev *dev)
 	do {
 		val = mt7601u_bbp_rr(dev, MT_BBP_REG_VERSION);
-		if (val && ~val)
+		if (val && val != 0xff)
 	} while (--i);

More information about the linux-arm-kernel mailing list