linux-kernel - Re: [PATCH] scsi: bnx2i: bnx2i_iscsi.c: Cleaning up variable is set more than once

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Date:	Thu, 26 Jun 2014 02:28:14 +0200
From:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
To:	Eddie Wai <eddie.wai@...adcom.com>
Cc:	Maurizio Lombardi <mlombard@...hat.com>,
	"James E.J. Bottomley" <JBottomley@...allels.com>,
	linux-scsi@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] scsi: bnx2i: bnx2i_iscsi.c: Cleaning up variable is set
 more than once

2014-06-25 19:13 GMT+02:00 Eddie Wai <eddie.wai@...adcom.com>:
> On Wed, 2014-06-25 at 16:26 +0200, Maurizio Lombardi wrote:
>> Hi,
>>
>> On 06/25/2014 04:04 PM, Rickard Strandqvist wrote:
>> > A struct member variable is set to different values without having used in between.
>> >
>> > This was found using a static code analysis program called cppcheck
>> >
>> > Signed-off-by: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
>> > ---
>> >  drivers/scsi/bnx2i/bnx2i_iscsi.c |    1 -
>> >  1 file changed, 1 deletion(-)
>> >
>> > diff --git a/drivers/scsi/bnx2i/bnx2i_iscsi.c b/drivers/scsi/bnx2i/bnx2i_iscsi.c
>> > index 166543f..fdf7bc3 100644
>> > --- a/drivers/scsi/bnx2i/bnx2i_iscsi.c
>> > +++ b/drivers/scsi/bnx2i/bnx2i_iscsi.c
>> > @@ -1643,7 +1643,6 @@ static void bnx2i_conn_get_stats(struct iscsi_cls_conn *cls_conn,
>> >     stats->r2t_pdus = conn->r2t_pdus_cnt;
>> >     stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
>> >     stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
>> > -   stats->custom_length = 3;
>> >     strcpy(stats->custom[2].desc, "eh_abort_cnt");
>> >     stats->custom[2].value = conn->eh_abort_cnt;
>> >     stats->digest_err = 0;
>> >
>>
>> Eddie,
>>
>> The code modifies the content of stats->custom[2], so shouldn't custom_length be set to 3?
>> Why is it set to zero at the end of this function?
> Nice find.  This is literally a day1 bug.  Yes, I agree that the
> custom_length should be left at 3.  Otherwise, the nlmsg replied back to
> the application would not have the custom message.  Thanks.
>>
>> Regards,
>> Maurizio Lombardi
>
>


Hi, and thank you!

If it's not obvious, I do all my fixes without changing the previous
intent. But obviously it is not always right, rather it is one of main
reasons to fix this type of error :)

But I'll make a new patch then, with = 3 ?


Kind regards
Rickard Strandqvist
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