[PATCH v1] i2c: busses: convert to devm_platform_get_and_ioremap_resource

[PATCH v1] i2c: busses: convert to devm_platform_get_and_ioremap_resource

[Dejin Zheng]

use devm_platform_get_and_ioremap_resource() to simplify code, which
contains platform_get_resource() and devm_ioremap_resource(), it also
get the resource for use by the following code.

Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com>
---
 drivers/i2c/busses/i2c-cadence.c      | 3 +--
 drivers/i2c/busses/i2c-pca-platform.c | 3 +--
 drivers/i2c/busses/i2c-rcar.c         | 4 +---
 drivers/i2c/busses/i2c-stm32f7.c      | 3 +--
 4 files changed, 4 insertions(+), 9 deletions(-)

diff --git a/drivers/i2c/busses/i2c-cadence.c b/drivers/i2c/busses/i2c-cadence.c
index 89d58f7d2a25..803c802611eb 100644
--- a/drivers/i2c/busses/i2c-cadence.c
+++ b/drivers/i2c/busses/i2c-cadence.c
@@ -906,8 +906,7 @@ static int cdns_i2c_probe(struct platform_device *pdev)
 		id->quirks = data->quirks;
 	}
 
-	r_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	id->membase = devm_ioremap_resource(&pdev->dev, r_mem);
+	id->membase = devm_platform_get_and_ioremap_resource(pdev, 0, &r_mem);
 	if (IS_ERR(id->membase))
 		return PTR_ERR(id->membase);
 
diff --git a/drivers/i2c/busses/i2c-pca-platform.c b/drivers/i2c/busses/i2c-pca-platform.c
index 635dd697ac0b..546426a470cc 100644
--- a/drivers/i2c/busses/i2c-pca-platform.c
+++ b/drivers/i2c/busses/i2c-pca-platform.c
@@ -149,8 +149,7 @@ static int i2c_pca_pf_probe(struct platform_device *pdev)
 	if (!i2c)
 		return -ENOMEM;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	i2c->reg_base = devm_ioremap_resource(&pdev->dev, res);
+	i2c->reg_base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
 	if (IS_ERR(i2c->reg_base))
 		return PTR_ERR(i2c->reg_base);
 
diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c
index 3b5397aa4ca6..a45c4bf1ec01 100644
--- a/drivers/i2c/busses/i2c-rcar.c
+++ b/drivers/i2c/busses/i2c-rcar.c
@@ -938,9 +938,7 @@ static int rcar_i2c_probe(struct platform_device *pdev)
 		return PTR_ERR(priv->clk);
 	}
 
-	priv->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-
-	priv->io = devm_ioremap_resource(dev, priv->res);
+	priv->io = devm_platform_get_and_ioremap_resource(pdev, 0, &priv->res);
 	if (IS_ERR(priv->io))
 		return PTR_ERR(priv->io);
 
diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c
index 330ffed011e0..cf48f8df4423 100644
--- a/drivers/i2c/busses/i2c-stm32f7.c
+++ b/drivers/i2c/busses/i2c-stm32f7.c
@@ -1940,8 +1940,7 @@ static int stm32f7_i2c_probe(struct platform_device *pdev)
 	if (!i2c_dev)
 		return -ENOMEM;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	i2c_dev->base = devm_ioremap_resource(&pdev->dev, res);
+	i2c_dev->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
 	if (IS_ERR(i2c_dev->base))
 		return PTR_ERR(i2c_dev->base);
 	phy_addr = (dma_addr_t)res->start;
-- 
2.25.0

Re: [PATCH v1] i2c: busses: convert to devm_platform_get_and_ioremap_resource

[Wolfram Sang]

[-- Attachment #1: Type: text/plain, Size: 671 bytes --]

On Tue, Apr 14, 2020 at 09:48:27PM +0800, Dejin Zheng wrote:
> use devm_platform_get_and_ioremap_resource() to simplify code, which
> contains platform_get_resource() and devm_ioremap_resource(), it also
> get the resource for use by the following code.
> 
> Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com>

Applied to for-next, because it seems 'the new way' but...

> -	r_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> -	id->membase = devm_ioremap_resource(&pdev->dev, r_mem);
> +	id->membase = devm_platform_get_and_ioremap_resource(pdev, 0, &r_mem);

... guys, do you really think this one line reduction improves
readability? Oh well...


[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]

Re: [PATCH v1] i2c: busses: convert to devm_platform_get_and_ioremap_resource

[Dejin Zheng]

On Wed, Apr 15, 2020 at 12:21:58PM +0200, Wolfram Sang wrote:
> On Tue, Apr 14, 2020 at 09:48:27PM +0800, Dejin Zheng wrote:
> > use devm_platform_get_and_ioremap_resource() to simplify code, which
> > contains platform_get_resource() and devm_ioremap_resource(), it also
> > get the resource for use by the following code.
> > 
> > Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com>
> 
> Applied to for-next, because it seems 'the new way' but...
> 
> > -	r_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > -	id->membase = devm_ioremap_resource(&pdev->dev, r_mem);
> > +	id->membase = devm_platform_get_and_ioremap_resource(pdev, 0, &r_mem);
> 
> ... guys, do you really think this one line reduction improves
> readability? Oh well...
>
Wolfram, Thank you for accepting it. From my personal point of view,
as long as the direction is correct, even small improvements are
worth doing. Thanks again for your tolerance.

BR,
Dejin

Re: [PATCH v1] i2c: busses: convert to devm_platform_get_and_ioremap_resource

[Andy Shevchenko]

On Thu, Apr 16, 2020 at 3:19 AM Dejin Zheng <zhengdejin5@gmail.com> wrote:
>
> On Wed, Apr 15, 2020 at 12:21:58PM +0200, Wolfram Sang wrote:
> > On Tue, Apr 14, 2020 at 09:48:27PM +0800, Dejin Zheng wrote:
> > > use devm_platform_get_and_ioremap_resource() to simplify code, which
> > > contains platform_get_resource() and devm_ioremap_resource(), it also
> > > get the resource for use by the following code.
> > >
> > > Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com>
> >
> > Applied to for-next, because it seems 'the new way' but...
> >
> > > -   r_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > > -   id->membase = devm_ioremap_resource(&pdev->dev, r_mem);
> > > +   id->membase = devm_platform_get_and_ioremap_resource(pdev, 0, &r_mem);
> >
> > ... guys, do you really think this one line reduction improves
> > readability? Oh well...
> >
> Wolfram, Thank you for accepting it. From my personal point of view,
> as long as the direction is correct, even small improvements are
> worth doing. Thanks again for your tolerance.

Do you have plans to move on from janitor work to something serious?

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH v1] i2c: busses: convert to devm_platform_get_and_ioremap_resource

[Dejin Zheng]

On Fri, Apr 17, 2020 at 11:46:33PM +0300, Andy Shevchenko wrote:
> On Thu, Apr 16, 2020 at 3:19 AM Dejin Zheng <zhengdejin5@gmail.com> wrote:
> >
> > On Wed, Apr 15, 2020 at 12:21:58PM +0200, Wolfram Sang wrote:
> > > On Tue, Apr 14, 2020 at 09:48:27PM +0800, Dejin Zheng wrote:
> > > > use devm_platform_get_and_ioremap_resource() to simplify code, which
> > > > contains platform_get_resource() and devm_ioremap_resource(), it also
> > > > get the resource for use by the following code.
> > > >
> > > > Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com>
> > >
> > > Applied to for-next, because it seems 'the new way' but...
> > >
> > > > -   r_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > > > -   id->membase = devm_ioremap_resource(&pdev->dev, r_mem);
> > > > +   id->membase = devm_platform_get_and_ioremap_resource(pdev, 0, &r_mem);
> > >
> > > ... guys, do you really think this one line reduction improves
> > > readability? Oh well...
> > >
> > Wolfram, Thank you for accepting it. From my personal point of view,
> > as long as the direction is correct, even small improvements are
> > worth doing. Thanks again for your tolerance.
> 
> Do you have plans to move on from janitor work to something serious?
>
Andy, I want to do��but I don��t know where to start, Could you give me
some suggestions? Thanks very much!

BR,
Dejin
> -- 
> With Best Regards,
> Andy Shevchenko

Re: [PATCH v1] i2c: busses: convert to devm_platform_get_and_ioremap_resource

[Andy Shevchenko]

On Sat, Apr 18, 2020 at 7:07 AM Dejin Zheng <zhengdejin5@gmail.com> wrote:

Leave only you and i2c ML to avoid spamming people.

> > > Wolfram, Thank you for accepting it. From my personal point of view,
> > > as long as the direction is correct, even small improvements are
> > > worth doing. Thanks again for your tolerance.
> >
> > Do you have plans to move on from janitor work to something serious?
> >
> Andy, I want to do��but I don��t know where to start, Could you give me
> some suggestions? Thanks very much!

I have been collecting some items on my Gist page [1], where anybody
(depending on the skills) can find affordable tasks. Tell me if you
need elaboration.

[1]: https://gist.github.com/andy-shev/a2cb1ee4767d6d2f5d20db53ecb9aabc

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH v1] i2c: busses: convert to devm_platform_get_and_ioremap_resource

[Dejin Zheng]

On Sat, Apr 18, 2020 at 04:00:03PM +0300, Andy Shevchenko wrote:
> On Sat, Apr 18, 2020 at 7:07 AM Dejin Zheng <zhengdejin5@gmail.com> wrote:
> 
> Leave only you and i2c ML to avoid spamming people.
> 
> > > > Wolfram, Thank you for accepting it. From my personal point of view,
> > > > as long as the direction is correct, even small improvements are
> > > > worth doing. Thanks again for your tolerance.
> > >
> > > Do you have plans to move on from janitor work to something serious?
> > >
> > Andy, I want to do��but I don��t know where to start, Could you give me
> > some suggestions? Thanks very much!
> 
> I have been collecting some items on my Gist page [1], where anybody
> (depending on the skills) can find affordable tasks. Tell me if you
> need elaboration.
> 
> [1]: https://gist.github.com/andy-shev/a2cb1ee4767d6d2f5d20db53ecb9aabc
>
Andy, thank you very much for your suggestion. I will study your Gist page
first. If there is something I don't understand, I will consult you again.
Thanks again for your help!

BR,
Dejin

> -- 
> With Best Regards,
> Andy Shevchenko

Re: [PATCH v1] i2c: busses: convert to devm_platform_get_and_ioremap_resource

[Dejin Zheng]

On Sat, Apr 18, 2020 at 04:00:03PM +0300, Andy Shevchenko wrote:
> On Sat, Apr 18, 2020 at 7:07 AM Dejin Zheng <zhengdejin5@gmail.com> wrote:
> 
> Leave only you and i2c ML to avoid spamming people.
> 
> > > > Wolfram, Thank you for accepting it. From my personal point of view,
> > > > as long as the direction is correct, even small improvements are
> > > > worth doing. Thanks again for your tolerance.
> > >
> > > Do you have plans to move on from janitor work to something serious?
> > >
> > Andy, I want to do��but I don��t know where to start, Could you give me
> > some suggestions? Thanks very much!
> 
> I have been collecting some items on my Gist page [1], where anybody
> (depending on the skills) can find affordable tasks. Tell me if you
> need elaboration.
> 
> [1]: https://gist.github.com/andy-shev/a2cb1ee4767d6d2f5d20db53ecb9aabc
>
Andy, your Gist page is really very suitable for me, I think I should be
able to start with the following two cases:

5. Run `codespell` across drivers and subsystems
6. Fix ioremap(..., 0) [size = 0] across architectures, now some return NULL,
   some return address, some may even have leaks

If I have any related commits, I will CC with you. Thanks!

BR,
Dejin

> -- 
> With Best Regards,
> Andy Shevchenko

Re: [PATCH v1] i2c: busses: convert to devm_platform_get_and_ioremap_resource

[Wolfram Sang]

[-- Attachment #1: Type: text/plain, Size: 358 bytes --]


> 5. Run `codespell` across drivers and subsystems

I think Colin King is already working on that. I regularly get patches
from him doing that.

> 6. Fix ioremap(..., 0) [size = 0] across architectures, now some return NULL,
>    some return address, some may even have leaks

This sounds more useful to me. Would be great if you have interest.


[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]

Re: [PATCH v1] i2c: busses: convert to devm_platform_get_and_ioremap_resource

[Andy Shevchenko]

On Mon, Apr 20, 2020 at 12:43 PM Wolfram Sang <wsa@the-dreams.de> wrote:
>
>
> > 5. Run `codespell` across drivers and subsystems
>
> I think Colin King is already working on that. I regularly get patches
> from him doing that.
>

I think CI should integrate it in their workflow,

LKP guys, what do you think?

> > 6. Fix ioremap(..., 0) [size = 0] across architectures, now some return NULL,
> >    some return address, some may even have leaks
>
> This sounds more useful to me. Would be great if you have interest.

But it much more advanced :-) Complete dive into the kernel guts.


-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH v1] i2c: busses: convert to devm_platform_get_and_ioremap_resource

[Wolfram Sang]

[-- Attachment #1: Type: text/plain, Size: 352 bytes --]


> > > 6. Fix ioremap(..., 0) [size = 0] across architectures, now some return NULL,
> > >    some return address, some may even have leaks
> >
> > This sounds more useful to me. Would be great if you have interest.
> 
> But it much more advanced :-) Complete dive into the kernel guts.

Well, learning by doing :) Dejin seems interested...


[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]

Re: [PATCH v1] i2c: busses: convert to devm_platform_get_and_ioremap_resource

[Dejin Zheng]

On Mon, Apr 20, 2020 at 11:57:15AM +0200, Wolfram Sang wrote:
> 
> > > > 6. Fix ioremap(..., 0) [size = 0] across architectures, now some return NULL,
> > > >    some return address, some may even have leaks
> > >
> > > This sounds more useful to me. Would be great if you have interest.
> > 
> > But it much more advanced :-) Complete dive into the kernel guts.
> 
> Well, learning by doing :) Dejin seems interested...
>
I do my best to try, Thank you all for your encouragement and help.

BR,
Dejin

Re: [LKP] Re: [PATCH v1] i2c: busses: convert to devm_platform_get_and_ioremap_resource

[Philip Li]

On Mon, Apr 20, 2020 at 12:47:12PM +0300, Andy Shevchenko wrote:
> On Mon, Apr 20, 2020 at 12:43 PM Wolfram Sang <wsa@the-dreams.de> wrote:
> >
> >
> > > 5. Run `codespell` across drivers and subsystems
> >
> > I think Colin King is already working on that. I regularly get patches
> > from him doing that.
> >
> 
> I think CI should integrate it in their workflow,
> 
> LKP guys, what do you think?
thanks, this looks valuable, we will investigate the tool
to see how we can integrate it to our testing flow.

> 
> > > 6. Fix ioremap(..., 0) [size = 0] across architectures, now some return NULL,
> > >    some return address, some may even have leaks
> >
> > This sounds more useful to me. Would be great if you have interest.
> 
> But it much more advanced :-) Complete dive into the kernel guts.
> 
> 
> -- 
> With Best Regards,
> Andy Shevchenko
> _______________________________________________
> LKP mailing list -- lkp@lists.01.org
> To unsubscribe send an email to lkp-leave@lists.01.org

Re: [PATCH v1] i2c: busses: convert to devm_platform_get_and_ioremap_resource

[Markus Elfring]

> use devm_platform_get_and_ioremap_resource() to simplify code, which
> contains platform_get_resource() and devm_ioremap_resource(), it also
> get the resource for use by the following code.

I suggest to improve also this change description.

I have tried another script variant out for the semantic patch language.
This source code analysis approach would propose to transform
15 source files (for example in the directory “drivers/i2c”
of the software “Linux next-20200417”).
Would you like to take another look at corresponding change possibilities?

Regards,
Markus