linux-kernel - Re: [PATCH] fpga: fpga-bridge: remove unnecessary null check in of_fpga_bridge

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Message-ID: <20171028192535.Horde.T7HEP1UuJs43TNa6pQe6Ziy@gator4166.hostgator.com>
Date:   Sat, 28 Oct 2017 19:25:35 -0500
From:   "Gustavo A. R. Silva" <garsilva@...eddedor.com>
To:     Moritz Fischer <mdf@...nel.org>
Cc:     Alan Tull <atull@...nel.org>, linux-fpga@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fpga: fpga-bridge: remove unnecessary null check in
 of_fpga_bridge_get

Hi Moritz,

Quoting Moritz Fischer <mdf@...nel.org>:

> On Fri, Oct 27, 2017 at 08:19:51PM +0000, Gustavo A. R. Silva wrote:
>> Notice that bridge = to_fpga_bridge(dev); expands to:
>>
>> bridge = container_of(dev, struct fpga_bridge, dev);
>>
>> and container_of is never null, so this null check is
>> unnecessary.
>>
>> Addresses-Coverity-ID: 1397912
>> Reported-by: Alan Tull <atull@...nel.org>
>> Signed-off-by: Gustavo A. R. Silva <garsilva@...eddedor.com>
> Reviewed-by: Moritz Fischer <mdf@...nel.org>
>> ---
>>  drivers/fpga/fpga-bridge.c | 2 --
>>  1 file changed, 2 deletions(-)
>>
>> diff --git a/drivers/fpga/fpga-bridge.c b/drivers/fpga/fpga-bridge.c
>> index 9651aa5..409d1ac 100644
>> --- a/drivers/fpga/fpga-bridge.c
>> +++ b/drivers/fpga/fpga-bridge.c
>> @@ -94,8 +94,6 @@ struct fpga_bridge *of_fpga_bridge_get(struct  
>> device_node *np,
>>  		goto err_dev;
>>
>>  	bridge = to_fpga_bridge(dev);
>> -	if (!bridge)
>> -		goto err_dev;
>>
>>  	bridge->info = info;
>>
>> --
>> 2.7.4
>>
>> --
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>
> Thanks for the fix,
>

Glad to help.

Thanks
--
Gustavo A. R. Silva