linux-kernel - Re: [PATCH] scsi: qla2xxx: initialize value

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Message-Id: <2E536F63-9F97-4B80-8538-D3176650CC70@oracle.com>
Date:   Wed, 7 Oct 2020 08:32:42 -0500
From:   Himanshu Madhani <himanshu.madhani@...cle.com>
To:     trix@...hat.com
Cc:     Nilesh Javali <njavali@...vell.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        natechancellor@...il.com, ndesaulniers@...gle.com,
        GR-QLogic-Storage-Upstream@...vell.com, linux-scsi@...r.kernel.org,
        linux-kernel@...r.kernel.org, clang-built-linux@...glegroups.com
Subject: Re: [PATCH] scsi: qla2xxx: initialize value



> On Oct 5, 2020, at 9:45 AM, trix@...hat.com wrote:
> 
> From: Tom Rix <trix@...hat.com>
> 
> clang static analysis reports this problem:
> 
> qla_nx2.c:694:3: warning: 6th function call argument is
>  an uninitialized value
>        ql_log(ql_log_fatal, vha, 0xb090,
>        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> In qla8044_poll_reg(), when reading the reg fails, the
> error is reported by reusing the timeout error reporter.
> Because the value is unset, a garbage value will be
> reported.  So initialize the value.
> 
> Signed-off-by: Tom Rix <trix@...hat.com>
> ---
> drivers/scsi/qla2xxx/qla_nx2.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/scsi/qla2xxx/qla_nx2.c b/drivers/scsi/qla2xxx/qla_nx2.c
> index 3a415b12dcec..01ccd4526707 100644
> --- a/drivers/scsi/qla2xxx/qla_nx2.c
> +++ b/drivers/scsi/qla2xxx/qla_nx2.c
> @@ -659,7 +659,7 @@ static int
> qla8044_poll_reg(struct scsi_qla_host *vha, uint32_t addr,
> 	int duration, uint32_t test_mask, uint32_t test_result)
> {
> -	uint32_t value;
> +	uint32_t value = 0;
> 	int timeout_error;
> 	uint8_t retries;
> 	int ret_val = QLA_SUCCESS;
> -- 
> 2.18.1
> 

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

--
Himanshu Madhani	 Oracle Linux Engineering