Messages in this thread | | | Date | Fri, 21 Nov 2014 18:59:00 +0100 (CET) | From | Julia Lawall <> | Subject | Re: USB: serial: Deletion of an unnecessary check before the function call "release_firmware" |
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On Fri, 21 Nov 2014, SF Markus Elfring wrote:
> >> diff --git a/drivers/usb/serial/mxuport.c b/drivers/usb/serial/mxuport.c > >> index ab1d690..3653ec1 100644 > >> --- a/drivers/usb/serial/mxuport.c > >> +++ b/drivers/usb/serial/mxuport.c > >> @@ -1101,8 +1101,7 @@ static int mxuport_probe(struct usb_serial *serial, > >> */ > >> usb_set_serial_data(serial, (void *)id->driver_info); > >> out: > >> - if (fw_p) > >> - release_firmware(fw_p); > >> + release_firmware(fw_p); > > > > I think that the if should stay. > > I have got an other opinion. > > > > There were two cases on the allocation, so there should be two cases > > on the release. > > I find that this implementation detail does not really matter for the > necessity of a null pointer check directly before such a function call.
Conceptually, if it is clear 10 lines above that nothing was allocated, and there is a fallback to existing data (according to the comment above) it is strange to be releasing something.
julia
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