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Date: Wed, 19 Mar 2008 15:22:54 -0700
From: David Brownell <david-b@...bell.net>
To: linux-pm@...ts.linux-foundation.org
Cc: "Rafael J. Wysocki" <rjw@...k.pl>, Greg KH <greg@...ah.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Kernel development list <linux-kernel@...r.kernel.org>
Subject: Re: [linux-pm] [PATCH 2/3] PM: Make wakeup flags available whenever CONFIG_PM is set (ver 2)
On Wednesday 19 March 2008, Rafael J. Wysocki wrote:
> From: Alan Stern <stern@...land.harvard.edu>
>
> The various wakeup flags and their accessor macros in struct
> dev_pm_info should be available whenever CONFIG_PM is enabled, not
> just when CONFIG_PM_SLEEP is on. Otherwise remote wakeup won't always
> be configurable for runtime power management. This patch (as1056b)
> fixes the oversight.
More accurately, fixes the "regression" ... as noted sometime
last summer, after 296699de6bdc717189a331ab6bbe90e05c94db06
introduced CONFIG_SUSPEND. But that didn't make the regression
list for that kernel, ergo the delay in fixing it.
- Dave
> [rjw: rebased]
>
> Signed-off-by: Alan Stern <stern@...land.harvard.edu>
> Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
> ---
> drivers/base/power/main.c | 2 --
> drivers/base/power/sysfs.c | 2 ++
> include/linux/pm.h | 36 +++++++++++++++++++++---------------
> 3 files changed, 23 insertions(+), 17 deletions(-)
>
> Index: linux-2.6/include/linux/pm.h
> ===================================================================
> --- linux-2.6.orig/include/linux/pm.h
> +++ linux-2.6/include/linux/pm.h
> @@ -183,9 +183,9 @@ typedef struct pm_message {
> struct dev_pm_info {
> pm_message_t power_state;
> unsigned can_wakeup:1;
> + unsigned should_wakeup:1;
> bool sleeping:1; /* Owned by the PM core */
> #ifdef CONFIG_PM_SLEEP
> - unsigned should_wakeup:1;
> struct list_head entry;
> #endif
> };
> @@ -198,11 +198,6 @@ extern void device_resume(void);
> extern int device_suspend(pm_message_t state);
> extern int device_prepare_suspend(pm_message_t state);
>
> -#define device_set_wakeup_enable(dev,val) \
> - ((dev)->power.should_wakeup = !!(val))
> -#define device_may_wakeup(dev) \
> - (device_can_wakeup(dev) && (dev)->power.should_wakeup)
> -
> extern void __suspend_report_result(const char *function, void *fn, int ret);
>
> #define suspend_report_result(fn, ret) \
> @@ -210,6 +205,24 @@ extern void __suspend_report_result(cons
> __suspend_report_result(__FUNCTION__, fn, ret); \
> } while (0)
>
> +#else /* !CONFIG_PM_SLEEP */
> +
> +static inline int device_suspend(pm_message_t state)
> +{
> + return 0;
> +}
> +
> +#define suspend_report_result(fn, ret) do { } while (0)
> +
> +#endif /* !CONFIG_PM_SLEEP */
> +
> +#ifdef CONFIG_PM
> +
> +#define device_set_wakeup_enable(dev,val) \
> + ((dev)->power.should_wakeup = !!(val))
> +#define device_may_wakeup(dev) \
> + (device_can_wakeup(dev) && (dev)->power.should_wakeup)
> +
> /*
> * Platform hook to activate device wakeup capability, if that's not already
> * handled by enable_irq_wake() etc.
> @@ -224,24 +237,17 @@ static inline int call_platform_enable_w
> return 0;
> }
>
> -#else /* !CONFIG_PM_SLEEP */
> -
> -static inline int device_suspend(pm_message_t state)
> -{
> - return 0;
> -}
> +#else /* !CONFIG_PM */
>
> #define device_set_wakeup_enable(dev,val) do{}while(0)
> #define device_may_wakeup(dev) (0)
>
> -#define suspend_report_result(fn, ret) do { } while (0)
> -
> static inline int call_platform_enable_wakeup(struct device *dev, int is_on)
> {
> return 0;
> }
>
> -#endif /* !CONFIG_PM_SLEEP */
> +#endif /* !CONFIG_PM */
>
> /* changes to device_may_wakeup take effect on the next pm state change.
> * by default, devices should wakeup if they can.
> Index: linux-2.6/drivers/base/power/main.c
> ===================================================================
> --- linux-2.6.orig/drivers/base/power/main.c
> +++ linux-2.6/drivers/base/power/main.c
> @@ -57,8 +57,6 @@ static DEFINE_MUTEX(dpm_list_mtx);
> /* 'true' if all devices have been suspended, protected by dpm_list_mtx */
> static bool all_sleeping;
>
> -int (*platform_enable_wakeup)(struct device *dev, int is_on);
> -
> /**
> * device_pm_add - add a device to the list of active devices
> * @dev: Device to be added to the list
> Index: linux-2.6/drivers/base/power/sysfs.c
> ===================================================================
> --- linux-2.6.orig/drivers/base/power/sysfs.c
> +++ linux-2.6/drivers/base/power/sysfs.c
> @@ -6,6 +6,8 @@
> #include <linux/string.h>
> #include "power.h"
>
> +int (*platform_enable_wakeup)(struct device *dev, int is_on);
> +
>
> /*
> * wakeup - Report/change current wakeup option for device
>
> _______________________________________________
> linux-pm mailing list
> linux-pm@...ts.linux-foundation.org
> https://lists.linux-foundation.org/mailman/listinfo/linux-pm
>
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