linux-kernel - Re: [PATCH] PM/Trace: get rid of synchronous resume limit during PM trace

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Message-ID: <54C5F3FF.6030600@linux.intel.com>
Date:	Mon, 26 Jan 2015 15:59:59 +0800
From:	"Fu, Zhonghui" <zhonghui.fu@...ux.intel.com>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>, len.brown@...el.com,
	pavel@....cz, Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-pm@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] PM/Trace: get rid of synchronous resume limit during
 PM trace


This is a incorrect patch , please ignore it.


Thanks,
Zhonghui

On 2015/1/26 13:07, Fu, Zhonghui wrote:
> From f9c841d1f943d81b5ab0aac7483e794a7f966296 Mon Sep 17 00:00:00 2001
> From: Zhonghui Fu <zhonghui.fu@...ux.intel.com>
> Date: Mon, 26 Jan 2015 11:27:08 +0800
> Subject: [PATCH] PM/Trace: get rid of synchronous resume limit during PM trace
>
> There are some kind of dependency between devices in some
> hardware platforms. So, asynchronous resuming devices may
> hang system due to wrong resume order. As a result, should
> not fore synchronously resuming devices during tracing
> PM events.
>
> Signed-off-by: Zhonghui Fu <zhonghui.fu@...ux.intel.com>
> ---
>  drivers/base/power/main.c    |    3 +--
>  include/linux/resume-trace.h |    7 -------
>  2 files changed, 1 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
> index 9717d5f..5df148b 100644
> --- a/drivers/base/power/main.c
> +++ b/drivers/base/power/main.c
> @@ -517,8 +517,7 @@ static int device_resume_noirq(struct device *dev, pm_message_t state, bool asyn
>  
>  static bool is_async(struct device *dev)
>  {
> -	return dev->power.async_suspend && pm_async_enabled
> -		&& !pm_trace_is_enabled();
> +	return dev->power.async_suspend && pm_async_enabled;
>  }
>  
>  static void async_resume_noirq(void *data, async_cookie_t cookie)
> diff --git a/include/linux/resume-trace.h b/include/linux/resume-trace.h
> index f31db23..fd0866e 100644
> --- a/include/linux/resume-trace.h
> +++ b/include/linux/resume-trace.h
> @@ -7,11 +7,6 @@
>  
>  extern int pm_trace_enabled;
>  
> -static inline int pm_trace_is_enabled(void)
> -{
> -       return pm_trace_enabled;
> -}
> -
>  struct device;
>  extern void set_trace_device(struct device *);
>  extern void generate_resume_trace(const void *tracedata, unsigned int user);
> @@ -24,8 +19,6 @@ extern int show_trace_dev_match(char *buf, size_t size);
>  
>  #else
>  
> -static inline int pm_trace_is_enabled(void) { return 0; }
> -
>  #define TRACE_DEVICE(dev) do { } while (0)
>  #define TRACE_RESUME(dev) do { } while (0)
>  
> -- 1.7.1
>

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