[PATCH 1/2][MTD]MLC device check in OneNAND driver

[PATCH 1/2][MTD]MLC device check in OneNAND driver

[Rohit Hassan Sathyanarayan]

Hi Artem,

Adding driver check for MLC flash type.


Signed-off-by: Rohit HS <rohit.hs@samsung.com>
Signed-off-by: Raghav Gupta <gupta.raghav@samsung.com>
---
 drivers/mtd/onenand/onenand_base.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index a2bb520..33e0dbb 100644
--- a/drivers/mtd/onenand/onenand_base.c
+++ b/drivers/mtd/onenand/onenand_base.c
@@ -4027,7 +4027,7 @@ int onenand_scan(struct mtd_info *mtd, int maxchips)
 	mtd->ecclayout = this->ecclayout;
 
 	/* Fill in remaining MTD driver data */
-	mtd->type = MTD_NANDFLASH;
+	mtd->type = ONENAND_IS_MLC(this) ? MTD_MLCNANDFLASH : MTD_NANDFLASH;
 	mtd->flags = MTD_CAP_NANDFLASH;
 	mtd->erase = onenand_erase;
 	mtd->point = NULL;
--


Regards,
Rohit.H.S

Re: [PATCH 1/2][MTD]MLC device check in OneNAND driver

[Artem Bityutskiy]

Hi,

few minor things. I could just do this all myself, but since this is not
the first non-perfect patch you send, I think I'll be a little nasty and
ask you should do the exercise :-)

On Thu, 2010-09-23 at 17:26 +0530, Rohit Hassan Sathyanarayan wrote:
> Hi Artem,
> 
> Adding driver check for MLC flash type.
> 
> 
> Signed-off-by: Rohit HS <rohit.hs@samsung.com>
> Signed-off-by: Raghav Gupta <gupta.raghav@samsung.com>

1. Do no add extra line between the message and signed off.

2. Ideally, your patches should be applicable with git-am without the
   need to edit them. Try git am for your patches and see the result -
   the commit message will contain 'Hi Artem,' phrase, which should not
   be there.

> ---
>  drivers/mtd/onenand/onenand_base.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
> index a2bb520..33e0dbb 100644
> --- a/drivers/mtd/onenand/onenand_base.c
> +++ b/drivers/mtd/onenand/onenand_base.c
> @@ -4027,7 +4027,7 @@ int onenand_scan(struct mtd_info *mtd, int maxchips)
>  	mtd->ecclayout = this->ecclayout;
>  
>  	/* Fill in remaining MTD driver data */
> -	mtd->type = MTD_NANDFLASH;
> +	mtd->type = ONENAND_IS_MLC(this) ? MTD_MLCNANDFLASH : MTD_NANDFLASH;
>  	mtd->flags = MTD_CAP_NANDFLASH;
>  	mtd->erase = onenand_erase;
>  	mtd->point = NULL;

The kernel does not compile with this patch. You should make this patch
the second, the first one should introduce MTD_MLCNANDFLASH.

The kernel has to be bisectable, you patches should not break
bisectability.

-- 
Best Regards,
Artem Bityutskiy (Артём Битюцкий)

RE: [PATCH 1/2][MTD]MLC device check in OneNAND driver

[Rohit Hassan Sathyanarayan]

Hi Artem,

> -----Original Message-----
> From: Artem Bityutskiy [mailto:dedekind1@gmail.com]
> Sent: Friday, September 24, 2010 2:10 PM
> To: Rohit Hassan Sathyanarayan
> Cc: v.dalal@samsung.com; linux-mtd@lists.infradead.org; gupta.raghav@samsung.com
> Subject: Re: [PATCH 1/2][MTD]MLC device check in OneNAND driver
> 
> Hi,
> 
> few minor things. I could just do this all myself, but since this is not
> the first non-perfect patch you send, I think I'll be a little nasty and
> ask you should do the exercise :-)

  We have combined two patches into one and have posted the same, hope new
  Patch complies properly.

> On Thu, 2010-09-23 at 17:26 +0530, Rohit Hassan Sathyanarayan wrote:
> > Hi Artem,
> >
> > Adding driver check for MLC flash type.
> >
> >
> > Signed-off-by: Rohit HS <rohit.hs@samsung.com>
> > Signed-off-by: Raghav Gupta <gupta.raghav@samsung.com>
> 
> 1. Do no add extra line between the message and signed off.
> 
> 2. Ideally, your patches should be applicable with git-am without the
>    need to edit them. Try git am for your patches and see the result -
>    the commit message will contain 'Hi Artem,' phrase, which should not
>    be there.
> 
> > ---
> >  drivers/mtd/onenand/onenand_base.c |    2 +-
> >  1 files changed, 1 insertions(+), 1 deletions(-)
> >
> > diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
> > index a2bb520..33e0dbb 100644
> > --- a/drivers/mtd/onenand/onenand_base.c
> > +++ b/drivers/mtd/onenand/onenand_base.c
> > @@ -4027,7 +4027,7 @@ int onenand_scan(struct mtd_info *mtd, int maxchips)
> >  	mtd->ecclayout = this->ecclayout;
> >
> >  	/* Fill in remaining MTD driver data */
> > -	mtd->type = MTD_NANDFLASH;
> > +	mtd->type = ONENAND_IS_MLC(this) ? MTD_MLCNANDFLASH : MTD_NANDFLASH;
> >  	mtd->flags = MTD_CAP_NANDFLASH;
> >  	mtd->erase = onenand_erase;
> >  	mtd->point = NULL;
> 
> The kernel does not compile with this patch. You should make this patch
> the second, the first one should introduce MTD_MLCNANDFLASH.
> 
> The kernel has to be bisectable, you patches should not break
> bisectability.
> 
> --
> Best Regards,
> Artem Bityutskiy (Артём Битюцкий)

Regards,
Rohit.H.S

[PATCH 1/2][MTD]MLC device check in OneNAND driver

[Rohit Hassan Sathyanarayan]

Hi Artem,

 This MLC device check will be required for adding MLC support in file system.


Signed-off-by: Rohit HS <rohit.hs@samsung.com>
---
 drivers/mtd/onenand/onenand_base.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index a2bb520..59af37d 100644
--- a/drivers/mtd/onenand/onenand_base.c
+++ b/drivers/mtd/onenand/onenand_base.c
@@ -4028,7 +4028,8 @@ int onenand_scan(struct mtd_info *mtd, int maxchips)
 
 	/* Fill in remaining MTD driver data */
 	mtd->type = MTD_NANDFLASH;
-	mtd->flags = MTD_CAP_NANDFLASH;
+	mtd->flags = ONENAND_IS_MLC(this) ? MTD_CAP_MLCNANDFLASH
+						: MTD_CAP_NANDFLASH;
 	mtd->erase = onenand_erase;
 	mtd->point = NULL;
 	mtd->unpoint = NULL;
---



Regards,
Rohit.H.S