linux-kernel - [PATCH] scsi: mpt3sas: Remove unnecessary parentheses and simplify null checks

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Date:   Thu, 20 Sep 2018 13:10:02 -0700
From:   Nathan Chancellor <natechancellor@...il.com>
To:     Sathya Prakash <sathya.prakash@...adcom.com>,
        Suganath Prabu Subramani 
        <suganath-prabu.subramani@...adcom.com>,
        "James E.J. Bottomley" <jejb@...ux.vnet.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Cc:     MPT-FusionLinux.pdl@...adcom.com, linux-scsi@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Nathan Chancellor <natechancellor@...il.com>
Subject: [PATCH] scsi: mpt3sas: Remove unnecessary parentheses and simplify null checks

Clang warns when multiple pairs of parentheses are used for a single
conditional statement.

drivers/scsi/mpt3sas/mpt3sas_base.c:535:11: warning: equality comparison
with extraneous parentheses [-Wparentheses-equality]
        if ((ioc == NULL))
             ~~~~^~~~~~~
drivers/scsi/mpt3sas/mpt3sas_base.c:535:11: note: remove extraneous
parentheses around the comparison to silence this warning
        if ((ioc == NULL))
            ~    ^      ~
drivers/scsi/mpt3sas/mpt3sas_base.c:535:11: note: use '=' to turn this
equality comparison into an assignment
        if ((ioc == NULL))
                 ^~
                 =
drivers/scsi/mpt3sas/mpt3sas_base.c:539:12: warning: equality comparison
with extraneous parentheses [-Wparentheses-equality]
        if ((pdev == NULL))
             ~~~~~^~~~~~~
drivers/scsi/mpt3sas/mpt3sas_base.c:539:12: note: remove extraneous
parentheses around the comparison to silence this warning
        if ((pdev == NULL))
            ~     ^      ~
drivers/scsi/mpt3sas/mpt3sas_base.c:539:12: note: use '=' to turn this
equality comparison into an assignment
        if ((pdev == NULL))
                  ^~
                  =
2 warnings generated.

Remove them and while we're at it, simplify the NULL checks as '!var' is
used more than 'var == NULL'.

Signed-off-by: Nathan Chancellor <natechancellor@...il.com>
---
 drivers/scsi/mpt3sas/mpt3sas_base.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c
index 59d7844ee022..a49f16fed4c8 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_base.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.c
@@ -532,11 +532,11 @@ static int mpt3sas_remove_dead_ioc_func(void *arg)
 	struct MPT3SAS_ADAPTER *ioc = (struct MPT3SAS_ADAPTER *)arg;
 	struct pci_dev *pdev;
 
-	if ((ioc == NULL))
+	if (!ioc)
 		return -1;
 
 	pdev = ioc->pdev;
-	if ((pdev == NULL))
+	if (!pdev)
 		return -1;
 	pci_stop_and_remove_bus_device_locked(pdev);
 	return 0;
-- 
2.19.0