| Message ID | 20160123025713.GA90611@google.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi Brian, On Fri, 22 Jan 2016 18:57:13 -0800 Brian Norris <computersforpeace@gmail.com> wrote: > All three look good, so pushed to l2-mtd.git/next. One comment below: Thanks. > > On Wed, Dec 02, 2015 at 12:01:07PM +0100, Boris Brezillon wrote: > > ... > > > +static u16 sunxi_nfc_randomizer_state(struct mtd_info *mtd, int page, bool ecc) > > +{ > > + const u16 *seeds = sunxi_nfc_randomizer_page_seeds; > > + int mod = mtd->erasesize / mtd->writesize; > > Richard suggested you use the mtd.h helper here. Patch below. Yep, I forgot to do this change. > > > + > > + if (mod > ARRAY_SIZE(sunxi_nfc_randomizer_page_seeds)) > > + mod = ARRAY_SIZE(sunxi_nfc_randomizer_page_seeds); > > + > > + if (ecc) { > > + if (mtd->ecc_step_size == 512) > > + seeds = sunxi_nfc_randomizer_ecc512_seeds; > > + else > > + seeds = sunxi_nfc_randomizer_ecc1024_seeds; > > + } > > + > > + return seeds[page % mod]; > > +} > > From: Brian Norris <computersforpeace@gmail.com> > Date: Fri, 22 Jan 2016 18:54:02 -0800 > Subject: [PATCH] mtd: nand: sunxi: use mtd_div_by_ws() helper > > Suggested-by: Richard Weinberger <richard@nod.at> > Signed-off-by: Brian Norris <computersforpeace@gmail.com> Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com> > --- > drivers/mtd/nand/sunxi_nand.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/mtd/nand/sunxi_nand.c b/drivers/mtd/nand/sunxi_nand.c > index 5f700719d5c2..b5ea6b312df0 100644 > --- a/drivers/mtd/nand/sunxi_nand.c > +++ b/drivers/mtd/nand/sunxi_nand.c > @@ -624,7 +624,7 @@ static u16 sunxi_nfc_randomizer_step(u16 state, int count) > static u16 sunxi_nfc_randomizer_state(struct mtd_info *mtd, int page, bool ecc) > { > const u16 *seeds = sunxi_nfc_randomizer_page_seeds; > - int mod = mtd->erasesize / mtd->writesize; > + int mod = mtd_div_by_ws(mtd->erasesize, mtd); Just a comment (which should not prevent you from applying this patch). Isn't it a bit overkill to cast the erasesize to a 64 bit value, and then do a do_div on it. Shouldn't happen often though, because ->writesize_shift should be != 0 in most (all?) cases. Another related remark: with the MLC/paired pages stuff I'll have to retrieve this information (number of write units per erase block) quite often, so maybe we should have a field (and/or an helper) for that. Thanks, Boris
On Sat, Jan 23, 2016 at 09:18:44AM +0100, Boris Brezillon wrote: > On Fri, 22 Jan 2016 18:57:13 -0800 > Brian Norris <computersforpeace@gmail.com> wrote: > > > > From: Brian Norris <computersforpeace@gmail.com> > > Date: Fri, 22 Jan 2016 18:54:02 -0800 > > Subject: [PATCH] mtd: nand: sunxi: use mtd_div_by_ws() helper > > > > Suggested-by: Richard Weinberger <richard@nod.at> > > Signed-off-by: Brian Norris <computersforpeace@gmail.com> > > Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com> Applied. > > --- > > drivers/mtd/nand/sunxi_nand.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/drivers/mtd/nand/sunxi_nand.c b/drivers/mtd/nand/sunxi_nand.c > > index 5f700719d5c2..b5ea6b312df0 100644 > > --- a/drivers/mtd/nand/sunxi_nand.c > > +++ b/drivers/mtd/nand/sunxi_nand.c > > @@ -624,7 +624,7 @@ static u16 sunxi_nfc_randomizer_step(u16 state, int count) > > static u16 sunxi_nfc_randomizer_state(struct mtd_info *mtd, int page, bool ecc) > > { > > const u16 *seeds = sunxi_nfc_randomizer_page_seeds; > > - int mod = mtd->erasesize / mtd->writesize; > > + int mod = mtd_div_by_ws(mtd->erasesize, mtd); > > Just a comment (which should not prevent you from applying this patch). > Isn't it a bit overkill to cast the erasesize to a 64 bit value, and > then do a do_div on it. Shouldn't happen often though, because > ->writesize_shift should be != 0 in most (all?) cases. drivers/mtd/nand/ assumes power-of-2 dimensions for many things, so probably. > Another related remark: with the MLC/paired pages stuff I'll have to > retrieve this information (number of write units per erase block) quite > often, so maybe we should have a field (and/or an helper) for that. Perhaps. Brian
diff --git a/drivers/mtd/nand/sunxi_nand.c b/drivers/mtd/nand/sunxi_nand.c index 5f700719d5c2..b5ea6b312df0 100644 --- a/drivers/mtd/nand/sunxi_nand.c +++ b/drivers/mtd/nand/sunxi_nand.c @@ -624,7 +624,7 @@ static u16 sunxi_nfc_randomizer_step(u16 state, int count) static u16 sunxi_nfc_randomizer_state(struct mtd_info *mtd, int page, bool ecc) { const u16 *seeds = sunxi_nfc_randomizer_page_seeds; - int mod = mtd->erasesize / mtd->writesize; + int mod = mtd_div_by_ws(mtd->erasesize, mtd); if (mod > ARRAY_SIZE(sunxi_nfc_randomizer_page_seeds)) mod = ARRAY_SIZE(sunxi_nfc_randomizer_page_seeds);