[PATCH] staging: dgap: fix returned errno code in dgap_parsefile()
Javier Martinez Canillas
javier at osg.samsung.com
Tue Sep 22 06:38:43 UTC 2015
Hello Sudip,
On 09/22/2015 06:52 AM, Sudip Mukherjee wrote:
> On Tue, Sep 22, 2015 at 02:39:36AM +0200, Javier Martinez Canillas wrote:
>> The driver is using -1 instead of the -ENOMEM defined macro to specify
>> that a buffer allocation failed. Since the error number is propagated,
>> the caller will get a -EPERM which is the wrong error condition.
> Just a little doubt. caller means the function which is calling this
> dgap_parsefile() or you meant the user?
I meant whatever function calls dgap_parsefile(), which currently is
only dgap_firmware_load().
> The function which is calling this dgap_parsefile() is just checking if
> it has received 0 or something else. Something else is error and it
> rerturns -EINVAL for all types of error (ofcourse that is also wrong).
> So the user will see -EINVAL for all types of error in dgap_parsefile().
>
Yes, I also verified what dgap_firmware_load() does with the returned error
code to make sure that it was safe to do this change without affecting the
rest of the driver.
But I believe the patch and what the commit message says is true regardless
of the fact that the caller is just checking for != 0. dgap_firmware_load()
stills gets a wrong error condition whether it's checking it or not.
> regards
> sudip
>
Best regards,
--
Javier Martinez Canillas
Open Source Group
Samsung Research America
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