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[PATCH v2 09/11] mtd: drop unnecessary partition parser data

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  [PATCH v2 09/11] mtd: drop unnecessary partition parser data Brian Norris <computersforpeace@gmail.com> - 2015-10-31 04:40 +0100
    Re: [PATCH v2 09/11] mtd: drop unnecessary partition parser data Marek Vasut <marex@denx.de> - 2015-10-31 16:30 +0100
      Re: [PATCH v2 09/11] mtd: drop unnecessary partition parser data Brian Norris <computersforpeace@gmail.com> - 2015-11-01 01:20 +0100
    Re: [PATCH v2 09/11] mtd: drop unnecessary partition parser data Boris Brezillon <boris.brezillon@free-electrons.com> - 2015-11-05 10:00 +0100
      Re: [PATCH v2 09/11] mtd: drop unnecessary partition parser data Brian Norris <computersforpeace@gmail.com> - 2015-11-12 00:50 +0100

#1259919 — [PATCH v2 09/11] mtd: drop unnecessary partition parser data

We should assign the MTD dev.of_node instead of the parser data field.
This gets us the equivalent partition parser behavior with fewer special
fields and parameter passing.

Also convert several of these to mtd_device_register(), since we don't
need the 2nd and 3rd parameters anymore.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
---
v2: use new helpers

 drivers/mtd/devices/mtd_dataflash.c | 5 ++---
 drivers/mtd/devices/spear_smi.c     | 6 ++----
 drivers/mtd/devices/st_spi_fsm.c    | 5 ++---
 drivers/mtd/maps/lantiq-flash.c     | 5 ++---
 drivers/mtd/maps/physmap_of.c       | 5 ++---
 drivers/mtd/onenand/omap2.c         | 8 +++-----
 6 files changed, 13 insertions(+), 21 deletions(-)

diff --git a/drivers/mtd/devices/mtd_dataflash.c b/drivers/mtd/devices/mtd_dataflash.c
index 39666d552682..0ada3ed6c23f 100644
--- a/drivers/mtd/devices/mtd_dataflash.c
+++ b/drivers/mtd/devices/mtd_dataflash.c
@@ -624,7 +624,6 @@ static int add_dataflash_otp(struct spi_device *spi, char *name, int nr_pages,
 {
 	struct dataflash		*priv;
 	struct mtd_info			*device;
-	struct mtd_part_parser_data	ppdata;
 	struct flash_platform_data	*pdata = dev_get_platdata(&spi->dev);
 	char				*otp_tag = "";
 	int				err = 0;
@@ -656,6 +655,7 @@ static int add_dataflash_otp(struct spi_device *spi, char *name, int nr_pages,
 	device->priv = priv;
 
 	device->dev.parent = &spi->dev;
+	mtd_set_of_node(device, spi->dev.of_node);
 
 	if (revision >= 'c')
 		otp_tag = otp_setup(device, revision);
@@ -665,8 +665,7 @@ static int add_dataflash_otp(struct spi_device *spi, char *name, int nr_pages,
 			pagesize, otp_tag);
 	spi_set_drvdata(spi, priv);
 
-	ppdata.of_node = spi->dev.of_node;
-	err = mtd_device_parse_register(device, NULL, &ppdata,
+	err = mtd_device_register(device,
 			pdata ? pdata->parts : NULL,
 			pdata ? pdata->nr_parts : 0);
 
diff --git a/drivers/mtd/devices/spear_smi.c b/drivers/mtd/devices/spear_smi.c
index 64c7458344d4..dd5069876537 100644
--- a/drivers/mtd/devices/spear_smi.c
+++ b/drivers/mtd/devices/spear_smi.c
@@ -810,7 +810,6 @@ static int spear_smi_setup_banks(struct platform_device *pdev,
 				 u32 bank, struct device_node *np)
 {
 	struct spear_smi *dev = platform_get_drvdata(pdev);
-	struct mtd_part_parser_data ppdata = {};
 	struct spear_smi_flash_info *flash_info;
 	struct spear_smi_plat_data *pdata;
 	struct spear_snor_flash *flash;
@@ -855,6 +854,7 @@ static int spear_smi_setup_banks(struct platform_device *pdev,
 		flash->mtd.name = flash_devices[flash_index].name;
 
 	flash->mtd.dev.parent = &pdev->dev;
+	mtd_set_of_node(&flash->mtd, np);
 	flash->mtd.type = MTD_NORFLASH;
 	flash->mtd.writesize = 1;
 	flash->mtd.flags = MTD_CAP_NORFLASH;
@@ -881,10 +881,8 @@ static int spear_smi_setup_banks(struct platform_device *pdev,
 		count = flash_info->nr_partitions;
 	}
 #endif
-	ppdata.of_node = np;
 
-	ret = mtd_device_parse_register(&flash->mtd, NULL, &ppdata, parts,
-					count);
+	ret = mtd_device_register(&flash->mtd, parts, count);
 	if (ret) {
 		dev_err(&dev->pdev->dev, "Err MTD partition=%d\n", ret);
 		return ret;
diff --git a/drivers/mtd/devices/st_spi_fsm.c b/drivers/mtd/devices/st_spi_fsm.c
index 3060025c8af4..5454b4113589 100644
--- a/drivers/mtd/devices/st_spi_fsm.c
+++ b/drivers/mtd/devices/st_spi_fsm.c
@@ -2025,7 +2025,6 @@ boot_device_fail:
 static int stfsm_probe(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
-	struct mtd_part_parser_data ppdata;
 	struct flash_info *info;
 	struct resource *res;
 	struct stfsm *fsm;
@@ -2035,7 +2034,6 @@ static int stfsm_probe(struct platform_device *pdev)
 		dev_err(&pdev->dev, "No DT found\n");
 		return -EINVAL;
 	}
-	ppdata.of_node = np;
 
 	fsm = devm_kzalloc(&pdev->dev, sizeof(*fsm), GFP_KERNEL);
 	if (!fsm)
@@ -2106,6 +2104,7 @@ static int stfsm_probe(struct platform_device *pdev)
 
 	fsm->mtd.name		= info->name;
 	fsm->mtd.dev.parent	= &pdev->dev;
+	mtd_set_of_node(&fsm->mtd, np);
 	fsm->mtd.type		= MTD_NORFLASH;
 	fsm->mtd.writesize	= 4;
 	fsm->mtd.writebufsize	= fsm->mtd.writesize;
@@ -2124,7 +2123,7 @@ static int stfsm_probe(struct platform_device *pdev)
 		(long long)fsm->mtd.size, (long long)(fsm->mtd.size >> 20),
 		fsm->mtd.erasesize, (fsm->mtd.erasesize >> 10));
 
-	return mtd_device_parse_register(&fsm->mtd, NULL, &ppdata, NULL, 0);
+	return mtd_device_register(&fsm->mtd, NULL, 0);
 }
 
 static int stfsm_remove(struct platform_device *pdev)
diff --git a/drivers/mtd/maps/lantiq-flash.c b/drivers/mtd/maps/lantiq-flash.c
index 93852054977e..33840f957269 100644
--- a/drivers/mtd/maps/lantiq-flash.c
+++ b/drivers/mtd/maps/lantiq-flash.c
@@ -110,7 +110,6 @@ ltq_copy_to(struct map_info *map, unsigned long to,
 static int
 ltq_mtd_probe(struct platform_device *pdev)
 {
-	struct mtd_part_parser_data ppdata;
 	struct ltq_mtd *ltq_mtd;
 	struct cfi_private *cfi;
 	int err;
@@ -161,13 +160,13 @@ ltq_mtd_probe(struct platform_device *pdev)
 	}
 
 	ltq_mtd->mtd->dev.parent = &pdev->dev;
+	mtd_set_of_node(&ltq_mtd->mtd, pdev->dev.of_node);
 
 	cfi = ltq_mtd->map->fldrv_priv;
 	cfi->addr_unlock1 ^= 1;
 	cfi->addr_unlock2 ^= 1;
 
-	ppdata.of_node = pdev->dev.of_node;
-	err = mtd_device_parse_register(ltq_mtd->mtd, NULL, &ppdata, NULL, 0);
+	err = mtd_device_register(ltq_mtd->mtd, NULL, 0);
 	if (err) {
 		dev_err(&pdev->dev, "failed to add partitions\n");
 		goto err_destroy;
diff --git a/drivers/mtd/maps/physmap_of.c b/drivers/mtd/maps/physmap_of.c
index e46b4e983666..b78265688075 100644
--- a/drivers/mtd/maps/physmap_of.c
+++ b/drivers/mtd/maps/physmap_of.c
@@ -166,7 +166,6 @@ static int of_flash_probe(struct platform_device *dev)
 	int reg_tuple_size;
 	struct mtd_info **mtd_list = NULL;
 	resource_size_t res_size;
-	struct mtd_part_parser_data ppdata;
 	bool map_indirect;
 	const char *mtd_name = NULL;
 
@@ -310,13 +309,13 @@ static int of_flash_probe(struct platform_device *dev)
 	if (err)
 		goto err_out;
 
-	ppdata.of_node = dp;
+	mtd_set_of_node(info->cmtd, dp);
 	part_probe_types = of_get_probes(dp);
 	if (!part_probe_types) {
 		err = -ENOMEM;
 		goto err_out;
 	}
-	mtd_device_parse_register(info->cmtd, part_probe_types, &ppdata,
+	mtd_device_parse_register(info->cmtd, part_probe_types, NULL,
 			NULL, 0);
 	of_free_probes(part_probe_types);
 
diff --git a/drivers/mtd/onenand/omap2.c b/drivers/mtd/onenand/omap2.c
index 3e0285696227..0aacf125938b 100644
--- a/drivers/mtd/onenand/omap2.c
+++ b/drivers/mtd/onenand/omap2.c
@@ -614,7 +614,6 @@ static int omap2_onenand_probe(struct platform_device *pdev)
 	struct onenand_chip *this;
 	int r;
 	struct resource *res;
-	struct mtd_part_parser_data ppdata = {};
 
 	pdata = dev_get_platdata(&pdev->dev);
 	if (pdata == NULL) {
@@ -713,6 +712,7 @@ static int omap2_onenand_probe(struct platform_device *pdev)
 	c->mtd.priv = &c->onenand;
 
 	c->mtd.dev.parent = &pdev->dev;
+	mtd_set_of_node(&c->mtd, pdata->of_node);
 
 	this = &c->onenand;
 	if (c->dma_channel >= 0) {
@@ -743,10 +743,8 @@ static int omap2_onenand_probe(struct platform_device *pdev)
 	if ((r = onenand_scan(&c->mtd, 1)) < 0)
 		goto err_release_regulator;
 
-	ppdata.of_node = pdata->of_node;
-	r = mtd_device_parse_register(&c->mtd, NULL, &ppdata,
-				      pdata ? pdata->parts : NULL,
-				      pdata ? pdata->nr_parts : 0);
+	r = mtd_device_register(&c->mtd, pdata ? pdata->parts : NULL,
+				pdata ? pdata->nr_parts : 0);
 	if (r)
 		goto err_release_onenand;
 
-- 
2.6.0.rc2.230.g3dd15c0

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#1260009

On Saturday, October 31, 2015 at 04:33:28 AM, Brian Norris wrote:
> We should assign the MTD dev.of_node instead of the parser data field.
> This gets us the equivalent partition parser behavior with fewer special
> fields and parameter passing.
> 
> Also convert several of these to mtd_device_register(), since we don't
> need the 2nd and 3rd parameters anymore.
> 
> Signed-off-by: Brian Norris <computersforpeace@gmail.com>

[...]

> diff --git a/drivers/mtd/maps/physmap_of.c b/drivers/mtd/maps/physmap_of.c
> index e46b4e983666..b78265688075 100644
> --- a/drivers/mtd/maps/physmap_of.c
> +++ b/drivers/mtd/maps/physmap_of.c
> @@ -166,7 +166,6 @@ static int of_flash_probe(struct platform_device *dev)
>  	int reg_tuple_size;
>  	struct mtd_info **mtd_list = NULL;
>  	resource_size_t res_size;
> -	struct mtd_part_parser_data ppdata;
>  	bool map_indirect;
>  	const char *mtd_name = NULL;
> 
> @@ -310,13 +309,13 @@ static int of_flash_probe(struct platform_device
> *dev) if (err)
>  		goto err_out;
> 
> -	ppdata.of_node = dp;
> +	mtd_set_of_node(info->cmtd, dp);
>  	part_probe_types = of_get_probes(dp);
>  	if (!part_probe_types) {
>  		err = -ENOMEM;
>  		goto err_out;
>  	}
> -	mtd_device_parse_register(info->cmtd, part_probe_types, &ppdata,
> +	mtd_device_parse_register(info->cmtd, part_probe_types, NULL,

Did you miss this one ?

>  			NULL, 0);
>  	of_free_probes(part_probe_types);
> 


This is really good, I like to see the ppdata nonsense finally going away.

Reviewed-by: Marek Vasut <marex@denx.de>

Best regards,
Marek Vasut
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#1260074

On Sat, Oct 31, 2015 at 04:26:32PM +0100, Marek Vasut wrote:
> On Saturday, October 31, 2015 at 04:33:28 AM, Brian Norris wrote:
> > -	mtd_device_parse_register(info->cmtd, part_probe_types, &ppdata,
> > +	mtd_device_parse_register(info->cmtd, part_probe_types, NULL,
> 
> Did you miss this one ?

What about it? I removed the parser data (the third argument), but I
can't yet drop the 2nd argument, since those parser types are
different than the defaults. So I can't drop any more arguments, nor can
I convert this to mtd_device_register().

(Now, I'd like to improve the device tree handling of parser types, so
we don't need any more specialized handling in drivers like this.)

> >  			NULL, 0);
> >  	of_free_probes(part_probe_types);
> > 
> 
> 
> This is really good, I like to see the ppdata nonsense finally going away.
> 
> Reviewed-by: Marek Vasut <marex@denx.de>

Thanks for the review! I'm happy to kill off much of this nonsense too.
And I think this will help in the long run on some other things too,
since now we have a canonical place to put common MTD bindings.

Brian
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#1263027

On Fri, 30 Oct 2015 20:33:28 -0700
Brian Norris <computersforpeace@gmail.com> wrote:

> --- a/drivers/mtd/maps/lantiq-flash.c
> +++ b/drivers/mtd/maps/lantiq-flash.c
> @@ -110,7 +110,6 @@ ltq_copy_to(struct map_info *map, unsigned long to,
>  static int
>  ltq_mtd_probe(struct platform_device *pdev)
>  {
> -	struct mtd_part_parser_data ppdata;
>  	struct ltq_mtd *ltq_mtd;
>  	struct cfi_private *cfi;
>  	int err;
> @@ -161,13 +160,13 @@ ltq_mtd_probe(struct platform_device *pdev)
>  	}
>  
>  	ltq_mtd->mtd->dev.parent = &pdev->dev;
> +	mtd_set_of_node(&ltq_mtd->mtd, pdev->dev.of_node);

Should be:

	mtd_set_of_node(ltq_mtd->mtd, pdev->dev.of_node);

(This error was reported by your aiaiai build test)

-- 
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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#1267541

On Thu, Nov 05, 2015 at 09:49:30AM +0100, Boris Brezillon wrote:
> On Fri, 30 Oct 2015 20:33:28 -0700
> Brian Norris <computersforpeace@gmail.com> wrote:
> 
> > --- a/drivers/mtd/maps/lantiq-flash.c
> > +++ b/drivers/mtd/maps/lantiq-flash.c
> > @@ -110,7 +110,6 @@ ltq_copy_to(struct map_info *map, unsigned long to,
> >  static int
> >  ltq_mtd_probe(struct platform_device *pdev)
> >  {
> > -	struct mtd_part_parser_data ppdata;
> >  	struct ltq_mtd *ltq_mtd;
> >  	struct cfi_private *cfi;
> >  	int err;
> > @@ -161,13 +160,13 @@ ltq_mtd_probe(struct platform_device *pdev)
> >  	}
> >  
> >  	ltq_mtd->mtd->dev.parent = &pdev->dev;
> > +	mtd_set_of_node(&ltq_mtd->mtd, pdev->dev.of_node);
> 
> Should be:
> 
> 	mtd_set_of_node(ltq_mtd->mtd, pdev->dev.of_node);
> 
> (This error was reported by your aiaiai build test)

Fixed that build error and pushed the rest of my 11 patches to
l2-mtd.git/next.
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