failed submitting interrupt urb error Glen Morgan West Virginia

Address Beckley, WV 25801
Phone (304) 254-8999
Website Link
Hours

failed submitting interrupt urb error Glen Morgan, West Virginia

If the driver is unable to keep up and the queue empties out, the behavior for new submissions is governed by the URB_ISO_ASAP flag. Return 0 on successful submissions. Unfortunately, I cannotprovide any expertise here, I do not even know what an interrupt urb is.Any hints will be appreciated.GreetingsMarc--To unsubscribe from this list: send the line "unsubscribe linux-usb" inthe body With that queuing policy, an endpoint's queue would never be empty.

The tt-scheduling patch should have fixed the "real" bug. > Eg. They | Mailadresse im HeaderMannheim, Germany | lose things." Winona Ryder | Fon: *49 621 72739834Nordisch by Nature | How to make an American Quilt | Fax: *49 3221 2323190 Alan As of Linux 2.6, all USB endpoint transfer queues support depths greater than one. If the flag is set, or if the queue is idle, then the URB is always assigned to the first available (and not yet expired) slot in the endpoint's schedule.

The caller must have correctly initialized the URB before submitting it. pl2303 - pl2303_open - failed submitting interrupt urb, error -28 From: Marc Haber Date: Tue Dec 02 2008 - 08:51:29 EST Next message: Stephen Smalley: "Re: [TOMOYO #13 (mmotm 2008-11-19-02-19) 01/11] Teach them to STFU when noone asked them shit to begin with.... When one googles for this error message, one finds a thread from 2006 with Greg KH commenting.

If they knew that a typo on the command > line was more easily correctable after the fact (since of course set > -o vi ) was in place.. For control endpoints, the synchronous usb_control_msg call is often used (in non-interrupt context) instead of this call. And for isochronous urbs, urb->start_frame is modified to reflect when the URB's transfers were scheduled to start. Functions such as usb_fill_bulk_urb and usb_fill_control_urb are available to ensure that most fields are correctly initialized, for the particular kind of transfer, although they will

In my case, the error doesn't hose the USB subsystem, I can unplug the adapters and plug them in again one and a time without a problem, and I can even If there is not enough bus bandwidth, the configuration/alt setting request will fail. Device drivers must explicitly request that repetition, by ensuring that some URB is always on the endpoint's queue (except possibly for short periods during completion callbacks). Therefore, submissions to periodic endpoints on devices under xHCI should never fail due to bandwidth constraints.

Not all isochronous transfer scheduling policies will work, but most host controller drivers should easily handle ISO queues going from now until 10-200 msec into the future. All sevenwork when only one of them is used at a time.Cereal is an application which keeps a process (GNU screen) attachedto the tty at all times to be able to For control endpoints, the synchronous usb_control_msg call is often used (in non-interrupt context) instead of this call. They | Mailadresse im HeaderMannheim, Germany | lose things." Winona Ryder | Fon: *49 621 72739834Nordisch by Nature | How to make an American Quilt | Fax: *49 3221 2323190--To unsubscribe

Reserved Bandwidth Transfers: Periodic transfers (interrupt or isochronous) are performed repeatedly, using the interval specified in the urb. For both interrupt and isochronous urbs, as part of successful URB submission urb->interval is modified to reflect the actual transfer period used (normally some power of two units). This means drivers can use their completion handlers to ensure they keep bandwidth they need, by reinitializing and resubmitting the just-completed urb until the driver longer needs that periodic bandwidth. GFP_ATOMIC is used when (a) you are inside a completion handler, an interrupt, bottom half, tasklet or timer, or (b) you are holding a spinlock or rwlock (does not apply to

When the completion function is called, control of the URB is returned to the device driver which issued the request. and who are you Greg oliver, I haven't wrote email to you. The completion handler may then immediately free or reuse that URB. Cereal is an application which keeps a process (GNU screen) attached to the tty at all times to be able to log what happens on the serial port.

That's fixed by the tt patch. Board index The team Delete all board cookies All times are UTC

sometimes I got that error. > What kernel version is this? 2.6.35 > And are you sure that your device actually has the RTS lines connected? > I have seen a Greetings Marc -- ----------------------------------------------------------------------------- Marc Haber | "I don't trust Computers.

They | Mailadresse im Header Mannheim, Germany | lose things." Winona Ryder | Fon: *49 621 72739834 Nordisch by Nature | How to make an American Quilt | Fax: *49 3221 All seven work when only one of them is used at a time. There are four different possible values; GFP_KERNEL, GFP_NOFS, GFP_NOIO and GFP_ATOMIC. Anyhow - just a pissed off observation...

then they may (I DOUBT IT) shut the fuck > up.... Some more specific rules for mem_flags can be inferred, such as (1) start_xmit, timeout, and receive methods of network drivers must use GFP_ATOMIC (they are called with a spinlock held); (2) I wrote a userspace program to enable/disable RTS line which is working fine with standard serial port like ttyS0 and ttyS1. Thanks a lot Greg, I have learned a lot interacting with you.

GFP_NOIO is used in the block io path and error handling of storage devices. That is often used through convenience wrappers, for the requests that are standardized in the USB 2.0 specification. If it helps, I can give out root access to the box in question to anybody who is willing to help and debug. You can force port P of the EHCI controller on bus B to runat low/full speed by doing:echo P >/sys/class/usb_host/usb_hostB/companionTo allow port P to run at high speed again, use the

Any hints will be appreciated. Return 0 on successful submissions. All other situations use GFP_KERNEL. In my case, the error doesn't hose the USBsubsystem, I can unplug the adapters and plug them in again one and atime without a problem, and I can even use the

If the submission is successful, the complete callback from the URB will be called exactly once, when the USB core and Host Controller Driver (HCD) are finished with the URB. This was previously a HCD-specific behavior, except for ISO transfers. GFP_NOFS is not ever used, as it has not been implemented yet. As of Linux 2.6, all USB endpoint transfer queues support depths greater than one.

For devices under xHCI, the bandwidth is reserved at configuration time, or when the alt setting is selected. Thanks- Raj -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo [at] vger More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the When I start cereal on all seven ports, I start getting"pl2303_open - failed submitting interrupt urb, error -28" errors inDec 2 14:07:36 alemana kernel: pl2303 ttyUSB2: pl2303_open - failed submitting interrupt For bulk endpoints, a synchronous usb_bulk_msg call is available.

If the submission is successful, the complete callback from the URB will be called exactly once, when the USB core and Host Controller Driver (HCD) are finished with the URB. When I start cereal on all seven ports, I start getting"pl2303_open - failed submitting interrupt urb, error -28" errors inDec 2 14:07:36 alemana kernel: pl2303 ttyUSB2: pl2303_open - failed submitting interrupt The caller must have correctly initialized the URB before submitting it. I think the core is just not able to schedule somany interrupt urbs with such a setup, running USB 1.1 devices behind aUSB 2.0 hub like this is a very difficult

The three types of completion are success, error, and unlink (a software-induced fault, also called “request cancellation”). As in the 2006 thread, unloading the EHCI driver (ehci_hcd) solves the issue, but is of course not an attractive option as soon as one wants to use even a USB