[Bluez-devel] Re: [PATCH] hci_usb: implement suspend/resume

[Bluez-devel] Re: [PATCH] hci_usb: implement suspend/resume

[Marcel Holtmann]

Hi Johannes,

> The attached patch implements suspend/resume for the hci_usb bluetooth
> driver by simply killing all outstanding urbs on suspend, and re-issuing
> them on resume.
> 
> This allows me to actually use the internal bluetooth "dongle" in my
> powerbook after suspend-to-ram without taking down all userland programs
> (sdpd, ...) and the hci device and reloading the module.

thanks for the patch. Due to the removed owner field it won't apply
cleanly to 2.6.16-rc1, but I can fix this easily by myself.

> +static int hci_usb_resume(struct usb_interface *intf)
> +{
> +	struct hci_usb *husb = usb_get_intfdata(intf);
> +	int i, err;
> +	unsigned long flags;
> +	if (!husb || intf == husb->isoc_iface)
> +		return 0;
> +	
> +	for (i = 0; i < 4; i++) {
> +		struct _urb_queue *q = &husb->pending_q[i];
> +		struct _urb *_urb;
> +		spin_lock_irqsave(&q->lock, flags);
> +		list_for_each_entry(_urb, &q->head, list) {
> +			err = usb_submit_urb(&_urb->urb, GFP_ATOMIC);
> +			if (err) break;
> +		}
> +		spin_unlock_irqrestore(&q->lock, flags);
> +		if (err)
> +			return -EIO;
> +	}
> +	return 0;
> +}

What happens if hci_usb_resume() really returns -EIO? Do we have to kill
the URBs again or does the USB subsystems disconnect the device in this
case?

Regards

Marcel




-------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc. Do you grep through log files
for problems?  Stop!  Download the new AJAX search engine that makes
searching your log files as easy as surfing the  web.  DOWNLOAD SPLUNK!
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=103432&bid=230486&dat=121642
_______________________________________________
Bluez-devel mailing list
Bluez-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/bluez-devel

Re: [linux-usb-devel] Re: [PATCH] hci_usb: implement suspend/resume

[Greg KH]

On Wed, Jan 18, 2006 at 04:34:08PM +0100, Oliver Neukum wrote:
> Am Mittwoch, 18. Januar 2006 15:13 schrieb Johannes Berg:
> > On Wed, 2006-01-18 at 14:25 +0100, Oliver Neukum wrote:
> > 
> > > This patch is wrong. usb_kill_urb() will sleep. You must not use it under
> > > a spinlock.
> > 
> > Whoops. Good catch. I'll have to analyse the logic with the lists being
> > used here (and probably add a temporary list). Will try to get a new
> > patch until tomorrow.
> > 
> > [side note: how about adding might_sleep() to usb_kill_urb? Then I'd at
> > least have noticed this right away]
> 
> Good idea.

Done.

thanks,

greg k-h

Re: [Bluez-devel] Re: [PATCH] hci_usb: implement suspend/resume

[John McCabe-Dansted]

On 1/19/06, Johannes Berg <johannes@sipsolutions.net> wrote:
> The attached patch implements suspend/resume for the hci_usb bluetooth
> driver by simply killing all outstanding urbs on suspend, and re-issuing
> them on resume.
>
> This allows me to actually use the internal bluetooth "dongle" in my
> powerbook after suspend-to-ram without taking down all userland programs
> (sdpd, ...) and the hci device and reloading the module.

Anybody have success using this patch with suspend2?

I get:

Feb  9 13:48:32 localhost kernel: [17193418.644000] uhci_hcd
0000:00:1f.2: USB bus 1 deregistered
Feb  9 13:48:32 localhost kernel: [17193418.660000] ACPI: PCI
interrupt for device 0000:00:1f.2 disabled
Feb  9 13:48:39 localhost kernel: [17193425.268000] Suspend2 2.2:
Initiating a software suspend cycle.
Feb  9 13:48:46 localhost kernel: [17193427.272000] userspace ui:
Failed to contact userspace process.
Feb  9 13:48:46 localhost kernel: [17193427.272000] Freezing processes
Feb  9 13:48:47 localhost kernel: [17193432.404000] Stopping tasks failed.
Feb  9 13:48:47 localhost kernel: [17193432.404000] Tasks that refused
to be refrigerated and haven't since exited:
Feb  9 13:48:47 localhost kernel: [17193432.404000]  - snd-bt-scod
(#2206) signalled and todo list empty.
Feb  9 13:48:47 localhost kernel: [17193432.428000] Suspend2 debugging info=
:
Feb  9 13:48:47 localhost kernel: [17193432.428000] - SUSPEND core   : 2.2
Feb  9 13:48:47 localhost kernel: [17193432.428000] - Kernel Version :
2.6.15.1-p4-s2-ll
Feb  9 13:48:47 localhost kernel: [17193432.428000] - Compiler vers. : 4.0
Feb  9 13:48:47 localhost kernel: [17193432.428000] - Attempt number : 2
Feb  9 13:48:47 localhost kernel: [17193432.428000] - Parameters     :
17 32 0 1 525 0
Feb  9 13:48:47 localhost kernel: [17193432.428000] - Overall expected
compression percentage: 50.
Feb  9 13:48:47 localhost kernel: [17193432.428000] - Compressor lzf enable=
d.
Feb  9 13:48:47 localhost kernel: [17193432.428000] - Swapwriter active.
Feb  9 13:48:47 localhost kernel: [17193432.428000]   Swap available
for image: 307241 pages.
Feb  9 13:48:47 localhost kernel: [17193432.428000] - Filewriter inactive.
Feb  9 13:48:47 localhost kernel: [17193432.428000] - No I/O speed
stats available.
Feb  9 13:48:47 localhost kernel: [17193433.656000] USB Universal Host
Controller Interface driver v2.3
Feb  9 13:48:47 localhost kernel: [17193433.668000] ACPI: PCI
Interrupt 0000:00:1f.2[D] -> GSI 19 (level, low) -> IRQ 16
Feb  9 13:48:47 localhost kernel: [17193433.672000] PCI: Setting
latency timer of device 0000:00:1f.2 to 64

--
John C. McCabe-Dansted
Master's Student
94709339 (In Perth)


-------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc. Do you grep through log files
for problems?  Stop!  Download the new AJAX search engine that makes
searching your log files as easy as surfing the  web.  DOWNLOAD SPLUNK!
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=103432&bid=230486&dat=121642
_______________________________________________
Bluez-devel mailing list
Bluez-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/bluez-devel

[Bluez-devel] Re: [PATCH] hci_usb: implement suspend/resume

[Marcel Holtmann]

Hi Johannes,

> > The attached patch implements suspend/resume for the hci_usb bluetooth
> > driver by simply killing all outstanding urbs on suspend, and re-issuing
> > them on resume.
> > 
> > This allows me to actually use the internal bluetooth "dongle" in my
> > powerbook after suspend-to-ram without taking down all userland programs
> > (sdpd, ...) and the hci device and reloading the module.
> 
> Can someone push this patch for 2.6.17 now that 2.6.16 is out? Or is
> there still anything fundamentally wrong with it? I've been waiting for
> it forever now ;)

I will push it with some other small changes in the next few days.

Regards

Marcel




-------------------------------------------------------
This SF.Net email is sponsored by xPML, a groundbreaking scripting language
that extends applications into web and mobile media. Attend the live webcast
and join the prime developer group breaking into this new coding territory!
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642
_______________________________________________
Bluez-devel mailing list
Bluez-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/bluez-devel