linux-kernel - Re: [PATCH 1/2] scsi: qla2xxx: remove redundant NULL check

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Date:   Fri, 22 Jan 2021 18:37:04 +0000
From:   Himanshu Madhani <himanshu.madhani@...cle.com>
To:     Yang Li <abaci-bugfix@...ux.alibaba.com>
CC:     "martin.petersen@...cle.c" <martin.petersen@...cle.c>,
        Martin Petersen <martin.petersen@...cle.com>,
        "njavali@...vell.com" <njavali@...vell.com>,
        "GR-QLogic-Storage-Upstream@...vell.com" 
        <GR-QLogic-Storage-Upstream@...vell.com>,
        "mrangankar@...vell.com" <mrangankar@...vell.com>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] scsi: qla2xxx: remove redundant NULL check



> On Jan 22, 2021, at 3:02 AM, Yang Li <abaci-bugfix@...ux.alibaba.com> wrote:
> 
> Fix below warnings reported by coccicheck:
> ./drivers/scsi/qla2xxx/qla_init.c:3371:2-7: WARNING: NULL check before
> some freeing functions is not needed.
> ./drivers/scsi/qla2xxx/qla_init.c:7855:5-10: WARNING: NULL check before
> some freeing functions is not needed.
> ./drivers/scsi/qla2xxx/qla_init.c:7916:2-7: WARNING: NULL check before
> some freeing functions is not needed.
> ./drivers/scsi/qla2xxx/qla_init.c:8113:4-18: WARNING: NULL check before
> some freeing functions is not needed.
> ./drivers/scsi/qla2xxx/qla_init.c:8174:2-7: WARNING: NULL check before
> some freeing functions is not needed.
> 
> Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
> Signed-off-by: Yang Li <abaci-bugfix@...ux.alibaba.com>
> ---
> drivers/scsi/qla2xxx/qla_init.c | 15 +++++----------
> 1 file changed, 5 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
> index dcc0f0d8..edd5dd1 100644
> --- a/drivers/scsi/qla2xxx/qla_init.c
> +++ b/drivers/scsi/qla2xxx/qla_init.c
> @@ -3371,8 +3371,7 @@ static void qla2x00_tmf_sp_done(srb_t *sp, int res)
> 				    "Re-Allocated (%d KB) and save firmware dump.\n",
> 				    dump_size / 1024);
> 			} else {
> -				if (ha->fw_dump)
> -					vfree(ha->fw_dump);
> +				vfree(ha->fw_dump);
> 				ha->fw_dump = fw_dump;
> 
> 				ha->fw_dump_len = ha->fw_dump_alloc_len =
> @@ -7855,8 +7854,7 @@ bool qla24xx_risc_firmware_invalid(uint32_t *dword)
> 	templates = (risc_attr & BIT_9) ? 2 : 1;
> 	ql_dbg(ql_dbg_init, vha, 0x0160, "-> templates = %u\n", templates);
> 	for (j = 0; j < templates; j++, fwdt++) {
> -		if (fwdt->template)
> -			vfree(fwdt->template);
> +		vfree(fwdt->template);
> 		fwdt->template = NULL;
> 		fwdt->length = 0;
> 
> @@ -7916,8 +7914,7 @@ bool qla24xx_risc_firmware_invalid(uint32_t *dword)
> 	return QLA_SUCCESS;
> 
> failed:
> -	if (fwdt->template)
> -		vfree(fwdt->template);
> +	vfree(fwdt->template);
> 	fwdt->template = NULL;
> 	fwdt->length = 0;
> 
> @@ -8113,8 +8110,7 @@ bool qla24xx_risc_firmware_invalid(uint32_t *dword)
> 	templates = (risc_attr & BIT_9) ? 2 : 1;
> 	ql_dbg(ql_dbg_init, vha, 0x0170, "-> templates = %u\n", templates);
> 	for (j = 0; j < templates; j++, fwdt++) {
> -		if (fwdt->template)
> -			vfree(fwdt->template);
> +		vfree(fwdt->template);
> 		fwdt->template = NULL;
> 		fwdt->length = 0;
> 
> @@ -8174,8 +8170,7 @@ bool qla24xx_risc_firmware_invalid(uint32_t *dword)
> 	return QLA_SUCCESS;
> 
> failed:
> -	if (fwdt->template)
> -		vfree(fwdt->template);
> +	vfree(fwdt->template);
> 	fwdt->template = NULL;
> 	fwdt->length = 0;
> 
> -- 
> 1.8.3.1
> 

Make Sense. 

Reviewed-by: Himanshu Madhani <himanshu.madhani@...cle.com>

--
Himanshu Madhani	 Oracle Linux Engineering