On Sun, Jun 26, Linux Kernel Mailing List wrote:
> tree e2de713c76ddb42b091305b88aa7ca4938081789
> parent 5ce47e59c9688d8480ae41100117d8188c191401
> author Pavel Machek <[email protected]> Sun, 26 Jun 2005 04:55:11 -0700
> committer Linus Torvalds <[email protected]> Sun, 26 Jun 2005 06:24:33 -0700
>
> [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 <[email protected]>
> Signed-off-by: Andrew Morton <[email protected]>
> Signed-off-by: Linus Torvalds <[email protected]>
>
> include/linux/pm.h | 33 +++++++++++++++++++++------------
> kernel/sys.c | 3 +++
> 2 files changed, 24 insertions(+), 12 deletions(-)
> +++ b/kernel/sys.c
> @@ -405,6 +405,7 @@ asmlinkage long sys_reboot(int magic1, i
> 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, i
> 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();
This change for 'case LINUX_REBOOT_CMD_POWER_OFF' causes an endless hang
after 'halt -p' on my Macs with USB keyboard.
It went into rc1, but the hang in an usb device (1-1.3) shows up only
with rc3. Why is device_suspend() called anyway if the
system will go down anyway in a few milliseconds?
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