linux-kernel - Re: [PATCH] usb: misc: remove unnecessary code

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Date:   Tue, 21 Feb 2017 23:35:57 -0600
From:   "Gustavo A. R. Silva" <garsilva@...eddedor.com>
To:     Peter Senna Tschudin <peter.senna@...il.com>
Cc:     gregkh@...uxfoundation.org, wsa-dev@...g-engineering.com,
        tj@...nel.org, bhaktipriya96@...il.com, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] usb: misc: remove unnecessary code

Hi Peter,

Quoting Peter Senna Tschudin <peter.senna@...il.com>:

> On Mon, Feb 20, 2017 at 05:28:46PM -0600, Gustavo A. R. Silva wrote:
>> 'val' is an unsigned variable, and less-than-zero comparison of an unsigned
>> variable is never true.
>
> I would add that val is set by kstrtoul() that converts a string to an
> unsigned long.
>
>>
>> Addresses-Coverity-ID: 1230257
> Reviewed-by: Peter Senna Tschudin <peter.senna@...il.com>
>> Signed-off-by: Gustavo A. R. Silva <garsilva@...eddedor.com>
>> ---
>>  drivers/usb/misc/lvstest.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/usb/misc/lvstest.c b/drivers/usb/misc/lvstest.c
>> index c7c2104..6f37610 100644
>> --- a/drivers/usb/misc/lvstest.c
>> +++ b/drivers/usb/misc/lvstest.c
>> @@ -193,7 +193,7 @@ static ssize_t u2_timeout_store(struct device *dev,
>>  		return ret;
>>  	}
>>
>> -	if (val < 0 || val > 127)
>> +	if (val > 127)
>>  		return -EINVAL;
>>
>>  	ret = lvs_rh_set_port_feature(hdev, lvs->portnum | (val << 8),
>> --
>> 2.5.0
>>

Thanks for your comments.
--
Gustavo A. R. Silva