[PATCH] properly stop devices before poweroff

Without this patch, Linux provokes emergency disk shutdowns and
similar nastiness. It was in SuSE kernels for some time, IIRC.

Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/kernel/sys.c b/kernel/sys.c
index da24bc1292db..dac10161ca23 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -405,6 +405,7 @@ asmlinkage long sys_reboot(int magic1, int magic2, unsigned int cmd, void __user
         case LINUX_REBOOT_CMD_HALT:
                 notifier_call_chain(&reboot_notifier_list, SYS_HALT, NULL);
                 system_state = SYSTEM_HALT;
+                device_suspend(PMSG_SUSPEND);
                 device_shutdown();
                 printk(KERN_EMERG "System halted.\n");
                 machine_halt();
@@ -415,6 +416,7 @@ asmlinkage long sys_reboot(int magic1, int magic2, unsigned int cmd, void __user
         case LINUX_REBOOT_CMD_POWER_OFF:
                 notifier_call_chain(&reboot_notifier_list, SYS_POWER_OFF, NULL);
                 system_state = SYSTEM_POWER_OFF;
+                device_suspend(PMSG_SUSPEND);
                 device_shutdown();
                 printk(KERN_EMERG "Power down.\n");
                 machine_power_off();
@@ -431,6 +433,7 @@ asmlinkage long sys_reboot(int magic1, int magic2, unsigned int cmd, void __user
 
                 notifier_call_chain(&reboot_notifier_list, SYS_RESTART, buffer);
                 system_state = SYSTEM_RESTART;
+                device_suspend(PMSG_FREEZE);
                 device_shutdown();
                 printk(KERN_EMERG "Restarting system with command '%s'.\n", buffer);
                 machine_restart(buffer);