Re: [PATCH] Remove suspend() calls from shutdown path

[Zilvinas Valinskas <zilvinas@gemtek.lt>]

On Thu, 2005-08-04 at 17:20 +0200, Benjamin Herrenschmidt wrote:
> On Thu, 2005-08-04 at 15:16 +0300, Zilvinas Valinskas wrote:
> > Hello Ben, Andrew, 
> > 
> > This patch helps me if I disconnect all USB peripherals before shutting
> > down notebook. With connected peripherals (USB mouse, PL2303
> > USB<->serial converter/port) - powering off process stops right after
> > unmounting filesystems but before hda power off ... 
> > 
> > There is a bug report for this too:
> > http://bugzilla.kernel.org/show_bug.cgi?id=4992
> 
> This is unclear.
> 
> I would expect the behaviour you report to happen _without_ this patch,
> that is with current git tree, and I would expect this patch to fix it
> by reverting to the previous 2.6.12 behaviour...
> 
> Ben.

Sys-rq - T: shows device_suspend() is called, perhaps that explains. It
seems that any attempt to suspend either USB hub or device connected to
it results in freeze. :\ Just guessing. 

Anything else should I try ?


hcd_submit_urb
wait_for_completion
default_wake_function
usb_start_wait_urb
timeout_kill
usb_internal_control_msg
usb_control_msg
hub_port_suspend
__usb_suspend_device
locktree
usb_suspend_device
__link_walk_path
device_suspend   <----- still called ?
ohci_reboot
generic_ide_ioctl
activate_task
__group_send_sig_info
sys_kill
block_ioctl
block_ioctl
do_ioctl
vfs_ioctl
get_name
sys_ioctl
sys_enter_esp