net/qla3xxx: Fix a test in ql_reset_work()

test_bit() tests if one bit is set or not.
Here the logic seems to check of bit QL_RESET_PER_SCSI (i.e. 4) OR bit
QL_RESET_START (i.e. 3) is set.

In fact, it checks if bit 7 (4 | 3 = 7) is set, that is to say
QL_ADAPTER_UP.

This looks harmless, because this bit is likely be set, and when the
ql_reset_work() delayed work is scheduled in ql3xxx_isr() (the only place
that schedule this work), QL_RESET_START or QL_RESET_PER_SCSI is set.

This has been spotted by smatch.

Fixes: 37c471ba9b41 ("[PATCH] qla3xxx NIC driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/80e73e33f390001d9c0140ffa9baddf6466a41a2.1652637337.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/qlogic/qla3xxx.c b/drivers/net/ethernet/qlogic/qla3xxx.c
index b30589a135c248254cf3fa2eda98e871b34781cc..06f4d9a9e9388634ca3d08e3911efa4cd09e4d25 100644 (file)
--- a/drivers/net/ethernet/qlogic/qla3xxx.c
+++ b/drivers/net/ethernet/qlogic/qla3xxx.c
@@ -3614,7 +3614,8 @@ static void ql_reset_work(struct work_struct *work)
                qdev->mem_map_registers;
        unsigned long hw_flags;
 
-       if (test_bit((QL_RESET_PER_SCSI | QL_RESET_START), &qdev->flags)) {
+       if (test_bit(QL_RESET_PER_SCSI, &qdev->flags) ||
+           test_bit(QL_RESET_START, &qdev->flags)) {
                clear_bit(QL_LINK_MASTER, &qdev->flags);
 
                /*