[PATCH] scsi: qla4xxx: remove redundant check on drvr_wait

[PATCH] scsi: qla4xxx: remove redundant check on drvr_wait

[Colin King]

From: Colin Ian King <colin.king@canonical.com>

The check for a non-zero drvr_wait is redundant as the same check
is performed earlier in the outer while loop, the inner check will
always be true if we reached this point inside the while loop.
Remove the redundant if check.

Detected by cppcheck:
(warning) Identical inner 'if' condition is always true.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
 drivers/scsi/qla4xxx/ql4_init.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/scsi/qla4xxx/ql4_init.c b/drivers/scsi/qla4xxx/ql4_init.c
index 52b1a0bc93c9..1ef74aa2d00a 100644
--- a/drivers/scsi/qla4xxx/ql4_init.c
+++ b/drivers/scsi/qla4xxx/ql4_init.c
@@ -766,12 +766,10 @@ int ql4xxx_lock_drvr_wait(struct scsi_qla_host *a)
 	while (drvr_wait) {
 		if (ql4xxx_lock_drvr(a) == 0) {
 			ssleep(QL4_LOCK_DRVR_SLEEP);
-			if (drvr_wait) {
-				DEBUG2(printk("scsi%ld: %s: Waiting for "
-					      "Global Init Semaphore(%d)...\n",
-					      a->host_no,
-					      __func__, drvr_wait));
-			}
+			DEBUG2(printk("scsi%ld: %s: Waiting for "
+				      "Global Init Semaphore(%d)...\n",
+				      a->host_no,
+				      __func__, drvr_wait));
 			drvr_wait -= QL4_LOCK_DRVR_SLEEP;
 		} else {
 			DEBUG2(printk("scsi%ld: %s: Global Init Semaphore "
-- 
2.17.1

RE: [PATCH] scsi: qla4xxx: remove redundant check on drvr_wait

[Rangankar, Manish]

> -----Original Message-----
> From: Colin King <colin.king@canonical.com>
> Sent: Wednesday, September 26, 2018 6:39 PM
> To: Dept-Eng QLogic Storage Upstream <QLogic-Storage-
> Upstream@cavium.com>; James E . J . Bottomley <jejb@linux.vnet.ibm.com>;
> Martin K . Petersen <martin.petersen@oracle.com>; linux-scsi@vger.kernel.org
> Cc: kernel-janitors@vger.kernel.org; linux-kernel@vger.kernel.org
> Subject: [PATCH] scsi: qla4xxx: remove redundant check on drvr_wait
> 
> External Email
> 
> From: Colin Ian King <colin.king@canonical.com>
> 
> The check for a non-zero drvr_wait is redundant as the same check is performed
> earlier in the outer while loop, the inner check will always be true if we reached
> this point inside the while loop.
> Remove the redundant if check.
> 
> Detected by cppcheck:
> (warning) Identical inner 'if' condition is always true.
> 
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
> ---
>  drivers/scsi/qla4xxx/ql4_init.c | 10 ++++------
>  1 file changed, 4 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/scsi/qla4xxx/ql4_init.c b/drivers/scsi/qla4xxx/ql4_init.c index
> 52b1a0bc93c9..1ef74aa2d00a 100644
> --- a/drivers/scsi/qla4xxx/ql4_init.c
> +++ b/drivers/scsi/qla4xxx/ql4_init.c
> @@ -766,12 +766,10 @@ int ql4xxx_lock_drvr_wait(struct scsi_qla_host *a)
>         while (drvr_wait) {
>                 if (ql4xxx_lock_drvr(a) == 0) {
>                         ssleep(QL4_LOCK_DRVR_SLEEP);
> -                       if (drvr_wait) {
> -                               DEBUG2(printk("scsi%ld: %s: Waiting for "
> -                                             "Global Init Semaphore(%d)...\n",
> -                                             a->host_no,
> -                                             __func__, drvr_wait));
> -                       }
> +                       DEBUG2(printk("scsi%ld: %s: Waiting for "
> +                                     "Global Init Semaphore(%d)...\n",
> +                                     a->host_no,
> +                                     __func__, drvr_wait));
>                         drvr_wait -= QL4_LOCK_DRVR_SLEEP;
>                 } else {
>                         DEBUG2(printk("scsi%ld: %s: Global Init Semaphore "
> --
> 2.17.1

Thanks,

Acked-by: Manish Rangankar <Manish.Rangankar@cavium.com>

Re: [PATCH] scsi: qla4xxx: remove redundant check on drvr_wait

[Martin K. Petersen]

Colin,

> The check for a non-zero drvr_wait is redundant as the same check is
> performed earlier in the outer while loop, the inner check will always
> be true if we reached this point inside the while loop.  Remove the
> redundant if check.

Applied to 4.20/scsi-queue. Thanks!

-- 
Martin K. Petersen	Oracle Linux Engineering