Re: [PATCH linux-next v4 5/5] mtd: atmel-quadspi: add driver for Atmel QSPI controller

Jonas Gorski
2015-08-25T09:46:51Z

On Mon, Aug 24, 2015 at 7:45 PM, Marek Vasut <marex@denx.de> wrote:
> On Monday, August 24, 2015 at 07:04:38 PM, Cyrille Pitchen wrote:
>> Hi Marek,
>
> Hi!
>
>> Le 24/08/2015 13:03, Marek Vasut a écrit :
>> > On Monday, August 24, 2015 at 12:14:00 PM, Cyrille Pitchen wrote:
>> >> This driver add support to the new Atmel QSPI controller embedded into
>> >> sama5d2x SoCs. It expects a NOR memory to be connected to the QSPI
>> >> controller.
>
> [...]
>
>> >> + /* Compute address parameters */
>> >> + switch (cmd->enable.bits.address) {
>> >> + case 4:
>> >> + ifr |= QSPI_IFR_ADDRL;
>> >> + /*break;*/ /* fallback to the 24bit address case */
>> >
>> > What's this commented out bit of code for ? :-)
>>
>> I just wanted to stress out there was no missing "break;".
>> I've reworded the comment to:
>> /* No "break" on purpose: fallback to the 24bit address case. */
>
> Oh, the address is in bytes . I see, yes, it makes sense to be more
> explicit here about the purpose of the fallback. I think this change
> in the comment will make it easier for everyone who comes back in a
> few years and reads this code.

I think you are looking for the term "(switch case) fallthrough", not
"fallback". "Fallback" makes it sound like there is something missing,
or an invalid state.

Jonas