diff options
| author | Rafael J. Wysocki <rjw@sisk.pl> | 2011-04-20 00:36:11 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2011-04-20 00:36:11 +0200 |
| commit | 19234c0819da0e043a02710488dfd9b242b42eba (patch) | |
| tree | c55331dd010e5fe257e001261f1a31f53f62dff4 /kernel/kexec.c | |
| parent | 2ca6f62f595c01f689b269db6736de5544da7667 (diff) | |
| download | lwn-19234c0819da0e043a02710488dfd9b242b42eba.tar.gz lwn-19234c0819da0e043a02710488dfd9b242b42eba.zip | |
PM: Add missing syscore_suspend() and syscore_resume() calls
Device suspend/resume infrastructure is used not only by the suspend
and hibernate code in kernel/power, but also by APM, Xen and the
kexec jump feature. However, commit 40dc166cb5dddbd36aa4ad11c03915ea
(PM / Core: Introduce struct syscore_ops for core subsystems PM)
failed to add syscore_suspend() and syscore_resume() calls to that
code, which generally leads to breakage when the features in question
are used.
To fix this problem, add the missing syscore_suspend() and
syscore_resume() calls to arch/x86/kernel/apm_32.c, kernel/kexec.c
and drivers/xen/manage.c.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Diffstat (limited to 'kernel/kexec.c')
| -rw-r--r-- | kernel/kexec.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/kexec.c b/kernel/kexec.c index 55936f9cb251..87b77de03dd3 100644 --- a/kernel/kexec.c +++ b/kernel/kexec.c @@ -33,6 +33,7 @@ #include <linux/vmalloc.h> #include <linux/swap.h> #include <linux/kmsg_dump.h> +#include <linux/syscore_ops.h> #include <asm/page.h> #include <asm/uaccess.h> @@ -1532,6 +1533,11 @@ int kernel_kexec(void) local_irq_disable(); /* Suspend system devices */ error = sysdev_suspend(PMSG_FREEZE); + if (!error) { + error = syscore_suspend(); + if (error) + sysdev_resume(); + } if (error) goto Enable_irqs; } else @@ -1546,6 +1552,7 @@ int kernel_kexec(void) #ifdef CONFIG_KEXEC_JUMP if (kexec_image->preserve_context) { + syscore_resume(); sysdev_resume(); Enable_irqs: local_irq_enable(); |