[U-Boot] [PATCH] mtd: nand: allow NAND_NO_SUBPAGE_WRITE to be set from driver

[Marek Vasut <marex@denx.de>]

Dear Stefano Babic,

> On 31/08/2012 01:39, Marek Vasut wrote:
> > This is based on Linux kernel -next:
> > 
> > commit a1256b0e087ed3cdb584c683acb966ee885f733c
> > Author: Brian Norris <computersforpeace@gmail.com>
> > Date:   Fri Jul 13 09:28:24 2012 -0700
> > 
> >     mtd: nand: allow NAND_NO_SUBPAGE_WRITE to be set from driver
> >     
> >     The NAND_CHIPOPTIONS_MSK has limited utility and is causing real
> >     bugs. It silently masks off at least one flag that might be set by
> >     the driver (NAND_NO_SUBPAGE_WRITE). This breaks the GPMI NAND driver
> >     and possibly others.
> >     
> >     Really, as long as driver writers exercise a small amount of care
> >     with NAND_* options, this mask is not necessary at all; it was only
> >     here to prevent certain options from accidentally being set by the
> >     driver. But the original thought turns out to be a bad idea
> >     occasionally. Thus, kill it.
> >     
> >     Note, this patch fixes some major gpmi-nand breakage.
> > 
> > Signed-off-by: Marek Vasut <marex@denx.de>
> > Cc: Brian Norris <computersforpeace@gmail.com>
> > Cc: Eric Nelson <eric.nelson@boundarydevices.com>
> > Cc: Fabio Estevam <festevam@gmail.com>
> > Cc: Otavio Salvador <otavio@ossystems.com.br>
> > Cc: Scott Wood <scottwood@freescale.com>
> > ---
> 
> Hi Marek,
> 
> >  drivers/mtd/nand/nand_base.c |    7 ++-----
> >  include/linux/mtd/nand.h     |    3 ---
> >  2 files changed, 2 insertions(+), 8 deletions(-)
> > 
> > NOTE: Please test before applying, I'd like to know it doesn't cause
> > breakage.
> > 
> > diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
> > index bfd668f..658b3ad 100644
> 
> This fixes the same issue on the ea20 (davinci), and drop the painful
> NAND_CHIPOPTIONS_MSK. Thanks !

I'm glad. I hope I didn't infringe anything with this patch and that I properly 
followed this "porting Linux patches" procedure.

> Regards,
> Stefano

Best regards,
Marek Vasut