Re: [PATCH v5 1/5] spi: spi-mem: Add driver for NXP FlexSPI controller

[Boris Brezillon <boris.brezillon@xxxxxxxxxxx>]

On Mon, 10 Dec 2018 10:31:57 +0000
Schrempf Frieder <frieder.schrempf@xxxxxxxxxx> wrote:

> >> Yes, I need to validate op->addr.nbytes else LUT would going to be programmed for 0 addrlen.
> >> I have checked this on the target.  
> > 
> > Also agree there. Some operations have 0 address bytes. We could also
> > test addr.buswidth, but I'm fine with the addr.nbytes test too.  
> 
> The "if (op->addr.nbytes)" is needed of course, but I think the default 
> case in the switch statement (and for other reasons the whole switch 
> statement) is not needed and rather a check for op->addr.nbytes > 4 
> should be added to nxp_fspi_supports_op(). I wrongly assumed this check 
> already exists in nxp_fspi_supports_op().

Ok, then this check on the max number of address bytes should indeed be
moved to the supports_op() implementation.