linux-kernel - [PATCH] s390/tape: Use bitwise instead of arithmetic operator for flags

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Date:   Tue, 15 Mar 2022 10:24:43 +0800
From:   Haowen Bai <baihaowen@...zu.com>
To:     <hca@...ux.ibm.com>, <gor@...ux.ibm.com>, <agordeev@...ux.ibm.com>
CC:     <linux-s390@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Haowen Bai <baihaowen@...zu.com>
Subject: [PATCH] s390/tape: Use bitwise instead of arithmetic operator for flags

This silences the following coccinelle warning:
drivers/s390/char/tape_34xx.c:360:38-39: WARNING: sum of probable bitmasks, consider |

Signed-off-by: Haowen Bai <baihaowen@...zu.com>
---
 drivers/s390/char/tape_34xx.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/s390/char/tape_34xx.c b/drivers/s390/char/tape_34xx.c
index 7ada994..487ad2d 100644
--- a/drivers/s390/char/tape_34xx.c
+++ b/drivers/s390/char/tape_34xx.c
@@ -354,10 +354,10 @@ tape_34xx_unit_check(struct tape_device *device, struct tape_request *request,
 	if ((
 		sense[0] == SENSE_DATA_CHECK      ||
 		sense[0] == SENSE_EQUIPMENT_CHECK ||
-		sense[0] == SENSE_EQUIPMENT_CHECK + SENSE_DEFERRED_UNIT_CHECK
+		sense[0] == SENSE_EQUIPMENT_CHECK | SENSE_DEFERRED_UNIT_CHECK
 	) && (
 		sense[1] == SENSE_DRIVE_ONLINE ||
-		sense[1] == SENSE_BEGINNING_OF_TAPE + SENSE_WRITE_MODE
+		sense[1] == SENSE_BEGINNING_OF_TAPE | SENSE_WRITE_MODE
 	)) {
 		switch (request->op) {
 		/*
-- 
2.7.4