diff mbox

[1/4] cpufreq: cpufreq-cpu0: assign cpu_dev correctly to cpu0 device

Message ID 1378835989-19281-2-git-send-email-Sudeep.KarkadaNagesha@arm.com (mailing list archive)
State Accepted, archived
Headers show

Commit Message

Sudeep KarkadaNagesha Sept. 10, 2013, 5:59 p.m. UTC
From: Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>

Commit f837a9b5ab05c52a07108c6f09ca66f2e0aee757 "cpufreq: cpufreq-cpu0:
remove device tree parsing for cpu nodes" assumed the pdev->dev is set to
cpu0 device in the platform code. But it actually points to the virtual
cpufreq-cpu0 platform device which is not present in the device tree.
Most of the information needed by cpufreq is stored in cpu0 DT node.
So cpu_dev must point to cpu0 device.

This patch fixes the wrong assignment to cpu_dev.

Reported-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>
---
 drivers/cpufreq/cpufreq-cpu0.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

Comments

Guennadi Liakhovetski Sept. 11, 2013, 8:15 a.m. UTC | #1
Hi Sudeep

On Tue, 10 Sep 2013, Sudeep KarkadaNagesha wrote:

> From: Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>
> 
> Commit f837a9b5ab05c52a07108c6f09ca66f2e0aee757 "cpufreq: cpufreq-cpu0:
> remove device tree parsing for cpu nodes" assumed the pdev->dev is set to
> cpu0 device in the platform code. But it actually points to the virtual
> cpufreq-cpu0 platform device which is not present in the device tree.
> Most of the information needed by cpufreq is stored in cpu0 DT node.
> So cpu_dev must point to cpu0 device.
> 
> This patch fixes the wrong assignment to cpu_dev.
> 
> Reported-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
> Cc: Shawn Guo <shawn.guo@linaro.org>
> Signed-off-by: Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>

Thanks for your patches

> ---
>  drivers/cpufreq/cpufreq-cpu0.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/cpufreq/cpufreq-cpu0.c b/drivers/cpufreq/cpufreq-cpu0.=
> c
> index cbfffa9..78c49d8 100644
> --- a/drivers/cpufreq/cpufreq-cpu0.c
> +++ b/drivers/cpufreq/cpufreq-cpu0.c
> @@ -12,6 +12,7 @@
>  #define pr_fmt(fmt)=09KBUILD_MODNAME ": " fmt
> =20

Noone else seems to complain, but I don't think these =20, =09 etc. codes 
have been invented on my side and I don't think they belong here. I'm 
handling enough mails / patches daily to believe, that my mail system 
isn't the cause of this. Could you please verify and regenerate and 
resend? Unless I'm mistaken this looks like a corruption on your SMTP 
side.

Thanks
Guennadi

>  #include <linux/clk.h>
> +#include <linux/cpu.h>
>  #include <linux/cpufreq.h>
>  #include <linux/err.h>
>  #include <linux/module.h>
> @@ -177,7 +178,11 @@ static int cpu0_cpufreq_probe(struct platform_device *=
> pdev)
>  =09struct device_node *np;
>  =09int ret;
> =20
> -=09cpu_dev =3D &pdev->dev;
> +=09cpu_dev =3D get_cpu_device(0);
> +=09if (!cpu_dev) {
> +=09=09pr_err("failed to get cpu0 device\n");
> +=09=09return -ENODEV;
> +=09}
> =20
>  =09np =3D of_node_get(cpu_dev->of_node);
>  =09if (!np) {
> --=20
> 1.8.1.2
> 
> 

---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/
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Viresh Kumar Sept. 11, 2013, 8:42 a.m. UTC | #2
On 11 September 2013 13:45, Guennadi Liakhovetski <g.liakhovetski@gmx.de> wrote:
> Noone else seems to complain, but I don't think these =20, =09 etc. codes
> have been invented on my side and I don't think they belong here. I'm
> handling enough mails / patches daily to believe, that my mail system
> isn't the cause of this. Could you please verify and regenerate and
> resend? Unless I'm mistaken this looks like a corruption on your SMTP
> side.

Its on Sudeep's side :) .. Or on ARM's side..
Don't know why nobody else complained, Atleast people who test these
patches (Like Shawn), must have applied them from mail.. Don't know
why they aren't shouting :)

He mostly send pull requests to Rafael and so this wasn't a issue for
Rafael :)
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Sudeep KarkadaNagesha Sept. 11, 2013, 8:55 a.m. UTC | #3
On 11/09/13 09:42, Viresh Kumar wrote:
> On 11 September 2013 13:45, Guennadi Liakhovetski <g.liakhovetski@gmx.de> wrote:
>> Noone else seems to complain, but I don't think these =20, =09 etc. codes
>> have been invented on my side and I don't think they belong here. I'm
>> handling enough mails / patches daily to believe, that my mail system
>> isn't the cause of this. Could you please verify and regenerate and
>> resend? Unless I'm mistaken this looks like a corruption on your SMTP
>> side.
> 
> Its on Sudeep's side :) .. Or on ARM's side..
> Don't know why nobody else complained, Atleast people who test these
> patches (Like Shawn), must have applied them from mail.. Don't know
> why they aren't shouting :)
> 
> He mostly send pull requests to Rafael and so this wasn't a issue for
> Rafael :)
> 

Yes looks like its at my end. I will try to fix it. There is alternate
SMTP which should not have this issue, but it was down recently. I
forgot to switch back to it once it was fixed.

For now you can fetch it from:
	git://linux-arm.org/linux-skn.git cpufreq_fixes_v3.12

Regards,
Sudeep

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Shawn Guo Sept. 11, 2013, 9:22 a.m. UTC | #4
On Wed, Sep 11, 2013 at 02:12:24PM +0530, Viresh Kumar wrote:
> On 11 September 2013 13:45, Guennadi Liakhovetski <g.liakhovetski@gmx.de> wrote:
> > Noone else seems to complain, but I don't think these =20, =09 etc. codes
> > have been invented on my side and I don't think they belong here. I'm
> > handling enough mails / patches daily to believe, that my mail system
> > isn't the cause of this. Could you please verify and regenerate and
> > resend? Unless I'm mistaken this looks like a corruption on your SMTP
> > side.
> 
> Its on Sudeep's side :) .. Or on ARM's side..
> Don't know why nobody else complained, Atleast people who test these
> patches (Like Shawn), must have applied them from mail.. Don't know
> why they aren't shouting :)

I'm not sure what's going on here.  But I did apply the patches from
mail without any problem, and the patch I got look just like what the
archive below [1] shows.

Shawn

[1] http://www.spinics.net/lists/arm-kernel/msg272474.html

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Rafael Wysocki Sept. 11, 2013, 12:47 p.m. UTC | #5
On Wednesday, September 11, 2013 02:12:24 PM Viresh Kumar wrote:
> On 11 September 2013 13:45, Guennadi Liakhovetski <g.liakhovetski@gmx.de> wrote:
> > Noone else seems to complain, but I don't think these =20, =09 etc. codes
> > have been invented on my side and I don't think they belong here. I'm
> > handling enough mails / patches daily to believe, that my mail system
> > isn't the cause of this. Could you please verify and regenerate and
> > resend? Unless I'm mistaken this looks like a corruption on your SMTP
> > side.
> 
> Its on Sudeep's side :) .. Or on ARM's side..
> Don't know why nobody else complained, Atleast people who test these
> patches (Like Shawn), must have applied them from mail.. Don't know
> why they aren't shouting :)

This looks like broken quoted-printable e-mail encoding somewhere (either
on the sending or on the receiving end).

> He mostly send pull requests to Rafael and so this wasn't a issue for
> Rafael :)

Git pulls are, well, from git, so e-mail encoding doesn't have anything to do
with them ...
Guennadi Liakhovetski Sept. 11, 2013, 3:43 p.m. UTC | #6
On Tue, 10 Sep 2013, Sudeep KarkadaNagesha wrote:

> From: Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>
> 
> Commit f837a9b5ab05c52a07108c6f09ca66f2e0aee757 "cpufreq: cpufreq-cpu0:
> remove device tree parsing for cpu nodes" assumed the pdev->dev is set to
> cpu0 device in the platform code. But it actually points to the virtual
> cpufreq-cpu0 platform device which is not present in the device tree.
> Most of the information needed by cpufreq is stored in cpu0 DT node.
> So cpu_dev must point to cpu0 device.
> 
> This patch fixes the wrong assignment to cpu_dev.
> 
> Reported-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
> Cc: Shawn Guo <shawn.guo@linaro.org>
> Signed-off-by: Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>

Tested-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>

Thanks
Guennadi

> ---
>  drivers/cpufreq/cpufreq-cpu0.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/cpufreq/cpufreq-cpu0.c b/drivers/cpufreq/cpufreq-cpu0.=
> c
> index cbfffa9..78c49d8 100644
> --- a/drivers/cpufreq/cpufreq-cpu0.c
> +++ b/drivers/cpufreq/cpufreq-cpu0.c
> @@ -12,6 +12,7 @@
>  #define pr_fmt(fmt)=09KBUILD_MODNAME ": " fmt
> =20
>  #include <linux/clk.h>
> +#include <linux/cpu.h>
>  #include <linux/cpufreq.h>
>  #include <linux/err.h>
>  #include <linux/module.h>
> @@ -177,7 +178,11 @@ static int cpu0_cpufreq_probe(struct platform_device *=
> pdev)
>  =09struct device_node *np;
>  =09int ret;
> =20
> -=09cpu_dev =3D &pdev->dev;
> +=09cpu_dev =3D get_cpu_device(0);
> +=09if (!cpu_dev) {
> +=09=09pr_err("failed to get cpu0 device\n");
> +=09=09return -ENODEV;
> +=09}
> =20
>  =09np =3D of_node_get(cpu_dev->of_node);
>  =09if (!np) {
> --=20
> 1.8.1.2
> 
> 

---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/
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diff mbox

Patch

diff --git a/drivers/cpufreq/cpufreq-cpu0.c b/drivers/cpufreq/cpufreq-cpu0.c
index cbfffa9..78c49d8 100644
--- a/drivers/cpufreq/cpufreq-cpu0.c
+++ b/drivers/cpufreq/cpufreq-cpu0.c
@@ -12,6 +12,7 @@ 
 #define pr_fmt(fmt)	KBUILD_MODNAME ": " fmt
 
 #include <linux/clk.h>
+#include <linux/cpu.h>
 #include <linux/cpufreq.h>
 #include <linux/err.h>
 #include <linux/module.h>
@@ -177,7 +178,11 @@  static int cpu0_cpufreq_probe(struct platform_device *pdev)
 	struct device_node *np;
 	int ret;
 
-	cpu_dev = &pdev->dev;
+	cpu_dev = get_cpu_device(0);
+	if (!cpu_dev) {
+		pr_err("failed to get cpu0 device\n");
+		return -ENODEV;
+	}
 
 	np = of_node_get(cpu_dev->of_node);
 	if (!np) {