linux-kernel - Re: [PATCH] ib_srpt: Remove redundant assignment to ret

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Message-ID: <b67909dc-c5d6-a8ce-5bea-36b1c7a2b04b@acm.org>
Date:   Thu, 6 May 2021 08:13:05 -0700
From:   Bart Van Assche <bvanassche@....org>
To:     Leon Romanovsky <leon@...nel.org>,
        Yang Li <yang.lee@...ux.alibaba.com>
Cc:     dledford@...hat.com, jgg@...pe.ca, nathan@...nel.org,
        ndesaulniers@...gle.com, linux-rdma@...r.kernel.org,
        target-devel@...r.kernel.org, linux-kernel@...r.kernel.org,
        clang-built-linux@...glegroups.com
Subject: Re: [PATCH] ib_srpt: Remove redundant assignment to ret

On 5/6/21 4:34 AM, Leon Romanovsky wrote:
> On Thu, May 06, 2021 at 06:15:05PM +0800, Yang Li wrote:
>> Variable 'ret' is set to -ENOMEM but this value is never read as it is
>> overwritten with a new value later on, hence it is a redundant
>> assignment and can be removed
>>
>> In 'commit b79fafac70fc ("target: make queue_tm_rsp() return void")'
>> srpt_queue_response() has been changed to return void, so after "goto
>> out", there is no need to return ret.
>>
>> Clean up the following clang-analyzer warning:
>>
>> drivers/infiniband/ulp/srpt/ib_srpt.c:2860:3: warning: Value stored to
>> 'ret' is never read [clang-analyzer-deadcode.DeadStores]
>>
>> Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
>> Signed-off-by: Yang Li <yang.lee@...ux.alibaba.com>
>> ---
>>  drivers/infiniband/ulp/srpt/ib_srpt.c | 1 -
>>  1 file changed, 1 deletion(-)
>>
> 
> Fixes: b99f8e4d7bcd ("IB/srpt: convert to the generic RDMA READ/WRITE API") 
> 
> Thanks,
> Reviewed-by: Leon Romanovsky <leonro@...dia.com>

Reverting commit b99f8e4d7bcd and handling queue_*_rsp() errors in the
LIO core probably would be a better approach. Anyway:

Reviewed-by: Bart Van Assche <bvanassche@....org>