[U-Boot] [PATCH] Blackfin: nand: drain the write buffer before returning

Mike Frysinger vapier at gentoo.org
Fri May 7 20:48:17 CEST 2010


On Friday 07 May 2010 13:51:51 Scott Wood wrote:
> On Fri, May 07, 2010 at 01:25:48AM -0400, Mike Frysinger wrote:
> > From: Andrew Caldwell <Andrew.Caldwell at analog.com>
> > 
> > The current Blackfin nand write function fills up the write buffer but
> > returns before it has had a chance to drain.  On faster systems, this
> > isn't a problem as the operation finishes before the ECC registers are
> > read, but on slower systems the ECC may be incomplete when the core tries
> > to read it.
> > 
> > So wait for the buffer to drain once we're doing writing to it.
> > 
> > Signed-off-by: Andrew Caldwell <Andrew.Caldwell at analog.com>
> > Signed-off-by: Mike Frysinger <vapier at gentoo.org>
> > ---
> > 
> >  drivers/mtd/nand/bfin_nand.c |    7 ++++++-
> >  1 files changed, 6 insertions(+), 1 deletions(-)
> 
> Applied to u-boot-nand-flash.

sorry, please drop this.  Andrew pointed out that i committed/posted the wrong 
version.  i'll send an update shortly.
-mike
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