diff options
| author | Rafael J. Wysocki <rjw@sisk.pl> | 2006-03-23 03:00:07 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-23 07:38:08 -0800 |
| commit | ff4da2e262d2509fe1bacff70dd00934be569c66 (patch) | |
| tree | 1e171f1858be98f4a7c6ea3f92358b692dab44dc /drivers | |
| parent | e4e4d665560c75afb6060cb43bb6738777648ca1 (diff) | |
| download | linux-ff4da2e262d2509fe1bacff70dd00934be569c66.tar.gz linux-ff4da2e262d2509fe1bacff70dd00934be569c66.tar.bz2 linux-ff4da2e262d2509fe1bacff70dd00934be569c66.zip | |
[PATCH] swsusp: add check for suspension of X-controlled devices
It is unsafe to suspend devices if the hardware is controlled by X. Add an
extra check to prevent this from happening.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/base/power/suspend.c | 5 | ||||
| -rw-r--r-- | drivers/char/vt.c | 8 |
2 files changed, 12 insertions, 1 deletions
diff --git a/drivers/base/power/suspend.c b/drivers/base/power/suspend.c index 8660779fb288..bdb60663f2ef 100644 --- a/drivers/base/power/suspend.c +++ b/drivers/base/power/suspend.c @@ -8,6 +8,7 @@ * */ +#include <linux/vt_kern.h> #include <linux/device.h> #include "../base.h" #include "power.h" @@ -62,7 +63,6 @@ int suspend_device(struct device * dev, pm_message_t state) return error; } - /** * device_suspend - Save state and stop all devices in system. * @state: Power state to put each device in. @@ -82,6 +82,9 @@ int device_suspend(pm_message_t state) { int error = 0; + if (!is_console_suspend_safe()) + return -EINVAL; + down(&dpm_sem); down(&dpm_list_sem); while (!list_empty(&dpm_active) && error == 0) { diff --git a/drivers/char/vt.c b/drivers/char/vt.c index 0900d1dbee59..86b31b87eb85 100644 --- a/drivers/char/vt.c +++ b/drivers/char/vt.c @@ -3234,6 +3234,14 @@ void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org) } } +int is_console_suspend_safe(void) +{ + /* It is unsafe to suspend devices while X has control of the + * hardware. Make sure we are running on a kernel-controlled console. + */ + return vc_cons[fg_console].d->vc_mode == KD_TEXT; +} + /* * Visible symbols for modules */ |