* [PATCH v1] mfd: core: Preserve PLATFORM_DEVID_NONE
@ 2017-03-16 14:19 Andy Shevchenko
2017-03-23 11:21 ` Lee Jones
0 siblings, 1 reply; 6+ messages in thread
From: Andy Shevchenko @ 2017-03-16 14:19 UTC (permalink / raw)
To: Lee Jones, linux-kernel; +Cc: Andy Shevchenko
There is a potential flaw if cell has id > 0 and is going to be
registered with PLATFORM_DEVID_NONE.
Ignore if PLATFORM_DEVID_NONE is supplied.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
drivers/mfd/mfd-core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
index c57e407020f1..c9583f895058 100644
--- a/drivers/mfd/mfd-core.c
+++ b/drivers/mfd/mfd-core.c
@@ -149,7 +149,7 @@ static int mfd_add_device(struct device *parent, int id,
int platform_id;
int r;
- if (id == PLATFORM_DEVID_AUTO)
+ if (id < 0)
platform_id = id;
else
platform_id = id + cell->id;
--
2.11.0
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH v1] mfd: core: Preserve PLATFORM_DEVID_NONE
2017-03-16 14:19 [PATCH v1] mfd: core: Preserve PLATFORM_DEVID_NONE Andy Shevchenko
@ 2017-03-23 11:21 ` Lee Jones
2017-03-23 13:09 ` Andy Shevchenko
0 siblings, 1 reply; 6+ messages in thread
From: Lee Jones @ 2017-03-23 11:21 UTC (permalink / raw)
To: Andy Shevchenko; +Cc: linux-kernel
On Thu, 16 Mar 2017, Andy Shevchenko wrote:
> There is a potential flaw if cell has id > 0 and is going to be
> registered with PLATFORM_DEVID_NONE.
>
> Ignore if PLATFORM_DEVID_NONE is supplied.
This is a substantial change to a pretty tried and tested piece of
sub-system code. Can you put some more meat on the bones in the
commit log, and include examples.
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> ---
> drivers/mfd/mfd-core.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
> index c57e407020f1..c9583f895058 100644
> --- a/drivers/mfd/mfd-core.c
> +++ b/drivers/mfd/mfd-core.c
> @@ -149,7 +149,7 @@ static int mfd_add_device(struct device *parent, int id,
> int platform_id;
> int r;
>
> - if (id == PLATFORM_DEVID_AUTO)
> + if (id < 0)
> platform_id = id;
> else
> platform_id = id + cell->id;
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH v1] mfd: core: Preserve PLATFORM_DEVID_NONE
2017-03-23 11:21 ` Lee Jones
@ 2017-03-23 13:09 ` Andy Shevchenko
2017-03-24 11:35 ` Lee Jones
0 siblings, 1 reply; 6+ messages in thread
From: Andy Shevchenko @ 2017-03-23 13:09 UTC (permalink / raw)
To: Lee Jones; +Cc: linux-kernel
On Thu, 2017-03-23 at 11:21 +0000, Lee Jones wrote:
> On Thu, 16 Mar 2017, Andy Shevchenko wrote:
>
> > There is a potential flaw if cell has id > 0 and is going to be
> > registered with PLATFORM_DEVID_NONE.
> >
> > Ignore if PLATFORM_DEVID_NONE is supplied.
>
> This is a substantial change to a pretty tried and tested piece of
> sub-system code. Can you put some more meat on the bones in the
> commit log, and include examples.
Example in pseudo code:
cells = {
[0] = { .id = 0, .name = "moduleX", },
[1] = { .id = 1, .name = "moduleY", },
[2] = { .id = 2, .name = "moduleZ", },
...
};
mfd_add_devices(..., PLATFORM_DEVID_NONE, cells, ARRAY_SIZE(cells),
...);
Output (names of the devices in the drivers):
"moduleX"
"moduleY.0"
"moduleX.1"
Desired output:
"moduleX"
"moduleY"
"moduleZ"
Is it by design?
>
> > Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> > ---
> > drivers/mfd/mfd-core.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
> > index c57e407020f1..c9583f895058 100644
> > --- a/drivers/mfd/mfd-core.c
> > +++ b/drivers/mfd/mfd-core.c
> > @@ -149,7 +149,7 @@ static int mfd_add_device(struct device *parent,
> > int id,
> > int platform_id;
> > int r;
> >
> > - if (id == PLATFORM_DEVID_AUTO)
> > + if (id < 0)
> > platform_id = id;
> > else
> > platform_id = id + cell->id;
>
>
--
Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Intel Finland Oy
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH v1] mfd: core: Preserve PLATFORM_DEVID_NONE
2017-03-23 13:09 ` Andy Shevchenko
@ 2017-03-24 11:35 ` Lee Jones
2017-03-26 12:53 ` Andy Shevchenko
0 siblings, 1 reply; 6+ messages in thread
From: Lee Jones @ 2017-03-24 11:35 UTC (permalink / raw)
To: Andy Shevchenko; +Cc: linux-kernel
On Thu, 23 Mar 2017, Andy Shevchenko wrote:
> On Thu, 2017-03-23 at 11:21 +0000, Lee Jones wrote:
> > On Thu, 16 Mar 2017, Andy Shevchenko wrote:
> >
> > > There is a potential flaw if cell has id > 0 and is going to be
> > > registered with PLATFORM_DEVID_NONE.
> > >
> > > Ignore if PLATFORM_DEVID_NONE is supplied.
> >
> > This is a substantial change to a pretty tried and tested piece of
> > sub-system code. Can you put some more meat on the bones in the
> > commit log, and include examples.
>
> Example in pseudo code:
>
> cells = {
> [0] = { .id = 0, .name = "moduleX", },
> [1] = { .id = 1, .name = "moduleY", },
> [2] = { .id = 2, .name = "moduleZ", },
> ...
> };
>
> mfd_add_devices(..., PLATFORM_DEVID_NONE, cells, ARRAY_SIZE(cells),
> ...);
>
> Output (names of the devices in the drivers):
> "moduleX"
> "moduleY.0"
> "moduleX.1"
>
> Desired output:
> "moduleX"
> "moduleY"
> "moduleZ"
Then what would be your reason for populating the 'id' attribute?
> Is it by design?
>
> >
> > > Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> > > ---
> > > drivers/mfd/mfd-core.c | 2 +-
> > > 1 file changed, 1 insertion(+), 1 deletion(-)
> > >
> > > diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
> > > index c57e407020f1..c9583f895058 100644
> > > --- a/drivers/mfd/mfd-core.c
> > > +++ b/drivers/mfd/mfd-core.c
> > > @@ -149,7 +149,7 @@ static int mfd_add_device(struct device *parent,
> > > int id,
> > > int platform_id;
> > > int r;
> > >
> > > - if (id == PLATFORM_DEVID_AUTO)
> > > + if (id < 0)
> > > platform_id = id;
> > > else
> > > platform_id = id + cell->id;
> >
> >
>
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH v1] mfd: core: Preserve PLATFORM_DEVID_NONE
2017-03-24 11:35 ` Lee Jones
@ 2017-03-26 12:53 ` Andy Shevchenko
2017-03-27 12:41 ` Lee Jones
0 siblings, 1 reply; 6+ messages in thread
From: Andy Shevchenko @ 2017-03-26 12:53 UTC (permalink / raw)
To: Lee Jones; +Cc: linux-kernel
On Fri, 2017-03-24 at 11:35 +0000, Lee Jones wrote:
> On Thu, 23 Mar 2017, Andy Shevchenko wrote:
>
> > On Thu, 2017-03-23 at 11:21 +0000, Lee Jones wrote:
> > > On Thu, 16 Mar 2017, Andy Shevchenko wrote:
> > >
> > > > There is a potential flaw if cell has id > 0 and is going to be
> > > > registered with PLATFORM_DEVID_NONE.
> > > >
> > > > Ignore if PLATFORM_DEVID_NONE is supplied.
> > >
> > > This is a substantial change to a pretty tried and tested piece of
> > > sub-system code. Can you put some more meat on the bones in the
> > > commit log, and include examples.
> >
> > Example in pseudo code:
> >
> > cells = {
> > [0] = { .id = 0, .name = "moduleX", },
> > [1] = { .id = 1, .name = "moduleY", },
> > [2] = { .id = 2, .name = "moduleZ", },
> > ...
> > };
> >
> > mfd_add_devices(..., PLATFORM_DEVID_NONE, cells, ARRAY_SIZE(cells),
> > ...);
> >
> > Output (names of the devices in the drivers):
> > "moduleX"
> > "moduleY.0"
> > "moduleX.1"
> >
> > Desired output:
> > "moduleX"
> > "moduleY"
> > "moduleZ"
>
> Then what would be your reason for populating the 'id' attribute?
That's a gray area. If I remember correctly I come to above patch
through looking some incremental change.
I'm fine with no patch applied if this is documented somewhere,
otherwise we might update documentation to cover such cases explicitly.
>
> > Is it by design?
> >
> > >
> > > > Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.co
> > > > m>
> > > > ---
> > > > drivers/mfd/mfd-core.c | 2 +-
> > > > 1 file changed, 1 insertion(+), 1 deletion(-)
> > > >
> > > > diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
> > > > index c57e407020f1..c9583f895058 100644
> > > > --- a/drivers/mfd/mfd-core.c
> > > > +++ b/drivers/mfd/mfd-core.c
> > > > @@ -149,7 +149,7 @@ static int mfd_add_device(struct device
> > > > *parent,
> > > > int id,
> > > > int platform_id;
> > > > int r;
> > > >
> > > > - if (id == PLATFORM_DEVID_AUTO)
> > > > + if (id < 0)
> > > > platform_id = id;
> > > > else
> > > > platform_id = id + cell->id;
> > >
> > >
>
>
--
Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Intel Finland Oy
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH v1] mfd: core: Preserve PLATFORM_DEVID_NONE
2017-03-26 12:53 ` Andy Shevchenko
@ 2017-03-27 12:41 ` Lee Jones
0 siblings, 0 replies; 6+ messages in thread
From: Lee Jones @ 2017-03-27 12:41 UTC (permalink / raw)
To: Andy Shevchenko; +Cc: linux-kernel
On Sun, 26 Mar 2017, Andy Shevchenko wrote:
> On Fri, 2017-03-24 at 11:35 +0000, Lee Jones wrote:
> > On Thu, 23 Mar 2017, Andy Shevchenko wrote:
> >
> > > On Thu, 2017-03-23 at 11:21 +0000, Lee Jones wrote:
> > > > On Thu, 16 Mar 2017, Andy Shevchenko wrote:
> > > >
> > > > > There is a potential flaw if cell has id > 0 and is going to be
> > > > > registered with PLATFORM_DEVID_NONE.
> > > > >
> > > > > Ignore if PLATFORM_DEVID_NONE is supplied.
> > > >
> > > > This is a substantial change to a pretty tried and tested piece of
> > > > sub-system code. Can you put some more meat on the bones in the
> > > > commit log, and include examples.
> > >
> > > Example in pseudo code:
> > >
> > > cells = {
> > > [0] = { .id = 0, .name = "moduleX", },
> > > [1] = { .id = 1, .name = "moduleY", },
> > > [2] = { .id = 2, .name = "moduleZ", },
> > > ...
> > > };
> > >
> > > mfd_add_devices(..., PLATFORM_DEVID_NONE, cells, ARRAY_SIZE(cells),
> > > ...);
> > >
> > > Output (names of the devices in the drivers):
> > > "moduleX"
> > > "moduleY.0"
> > > "moduleX.1"
> > >
> > > Desired output:
> > > "moduleX"
> > > "moduleY"
> > > "moduleZ"
> >
> > Then what would be your reason for populating the 'id' attribute?
>
> That's a gray area. If I remember correctly I come to above patch
> through looking some incremental change.
>
> I'm fine with no patch applied if this is documented somewhere,
> otherwise we might update documentation to cover such cases explicitly.
I'd be happy to review any proposal you put forward. :)
> > > Is it by design?
> > >
> > > >
> > > > > Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.co
> > > > > m>
> > > > > ---
> > > > > drivers/mfd/mfd-core.c | 2 +-
> > > > > 1 file changed, 1 insertion(+), 1 deletion(-)
> > > > >
> > > > > diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
> > > > > index c57e407020f1..c9583f895058 100644
> > > > > --- a/drivers/mfd/mfd-core.c
> > > > > +++ b/drivers/mfd/mfd-core.c
> > > > > @@ -149,7 +149,7 @@ static int mfd_add_device(struct device
> > > > > *parent,
> > > > > int id,
> > > > > int platform_id;
> > > > > int r;
> > > > >
> > > > > - if (id == PLATFORM_DEVID_AUTO)
> > > > > + if (id < 0)
> > > > > platform_id = id;
> > > > > else
> > > > > platform_id = id + cell->id;
> > > >
> > > >
> >
> >
>
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2017-03-27 12:42 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2017-03-16 14:19 [PATCH v1] mfd: core: Preserve PLATFORM_DEVID_NONE Andy Shevchenko
2017-03-23 11:21 ` Lee Jones
2017-03-23 13:09 ` Andy Shevchenko
2017-03-24 11:35 ` Lee Jones
2017-03-26 12:53 ` Andy Shevchenko
2017-03-27 12:41 ` Lee Jones
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