umably this won't come up very often. If all the children devices are
properly suspended first then there shouldn't be any calls to queuecommand
while your device is being suspended.
Alan Stern
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done
On Fri, 30 Jun 2006, Oliver Neukum wrote:
> Am Freitag, 30. Juni 2006 04:17 schrieb Alan Stern:
> > On Thu, 29 Jun 2006, Oliver Neukum wrote:
> >
> > > Hi,
> > >
> > > does anybody know what error to return from queuecommand for commands
> &
On Fri, 30 Jun 2006, Foli Ayivoh wrote:
> Alan Stern wrote:
> > On Wed, 28 Jun 2006, Andrew Morton wrote:
> >
> > > Begin forwarded message:
> > >
> > > Date: Tue, 27 Jun 2006 20:18:45 +0200
> > > From: Foli Ayivoh <[EMAIL PROTECTED]>
>
On Fri, 30 Jun 2006, Greg KH wrote:
> On Wed, Jun 28, 2006 at 11:27:40AM -0400, Alan Stern wrote:
> > Greg:
> >
> > This patch (as732) adds a usb_device_driver structure, for representing
> > drivers that manage an entire USB device as opposed to just an interface.
he
> appropriate place. I've googled a bit with no success...
This does not sound like a problem with the USB stack.
You can find out for certain what's really happening by using the usbmon
facility in 2.6.17. Instructions are in the kernel source file
Documentation/usb/usbmon.txt.
My best
I controllers, the DMA engine is configured by writing the Frame
List Base Address to one of the controller's registers. This is the
address of the main data structure used by the DMA engine (it contains
pointers to other data structures). No extra configuration is needed.
Alan Stern
Usin
above plus the ten more recent ones (since you
successfully applied 01/11). Since they have already been posted on the
mailing list, I'll send them directly to you off-list.
Alan Stern
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly wi
ly learn about the problems and what
their options are.
Do you feel up to writing a FAQ entry?
Alan Stern
P.S.: This business about drives requiring 1000 mA at startup... I don't
know what the story is on that, but the USB spec does not permit a device
to draw that much current.
; the interrupt its on.
I don't understand the problem you are describing. The kernel doesn't
kill off an IRQ unless it gets a lot of unhandled interrupts (99900 out of
the last 10). But none of the interrupts you mention will be
unhandled -- ehci-hcd will handle all of them. So w
tatus in interrupt URBs for a given
hub.
> On 7/2/06, Alan Stern <[EMAIL PROTECTED]> wrote:
>
> > I don't understand the problem you are describing. The kernel doesn't
> > kill off an IRQ unless it gets a lot of unhandled interrupts (99900 out of
> > the last 100
GETD stands for "Get Descriptor" and SETA stands for "Set
Address".
Yes, once the host has fetched the device, configuration, and string
descriptors and set the device address then enumeration has completed. In
fact, that's what enumeration _is_.
Alan Stern
Using To
LINUX ONLY
> 2.6.16 OK
>
> The affected keyboard is "KEYBOARD TWO" that is connected via the KVM-SWITCH.
Does the keyboard work better if you attach it directly to one of the
computers, bypassing the KVM swi
e KVM switch? Perhaps the switch causes those
> > communications errors.
> >
> > Also, can you post the output from "lsusb -v"?
> >
> > Alan Stern
> >
> I connected the keyboard to "HOST TWO" (Kernel 2.6.16) through an Belkin
> 7-Port Hub
>
On Mon, 3 Jul 2006, Greg KH wrote:
> On Sat, Jul 01, 2006 at 10:17:52PM -0400, Alan Stern wrote:
> > Pavel Machek has stated that the current /sys/devices/.../power/state
> > interface is broken and likely to be replaced. It seems like a good idea
> > to add a separate priv
7;re welcome. The _real_ test will be to see what shows up in the log
when you disconnect the KVM switch...
Alan Stern
Using Tomcat but need to do more? Need to support web services, security?
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On Tue, 4 Jul 2006, Foli Ayivoh wrote:
> > You're welcome. The _real_ test will be to see what shows up in the log
> > when you disconnect the KVM switch...
> >
> > Alan Stern
> >
> Connecting the keyboard directly (without the KVM-SWITCH)
> to
to the disconnected devices (your #1, I think);
>
> This can take over a second; usually not, but it can. In the
> meantime, I'm getting up to an interrupt per endpoint per millisecond.
This will continue only for as long as the failed URBs continue to be
resubmitted. You should co
s more pain than would be justified', correct?
Ummm... I've lost track of the original question. What is suboptimal and
would be painful to fix?
Alan Stern
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to
ilable for turning off power to hub ports:
http://www.gniibe.org/ac-power-by-usb/ac-power-control.html
The problem is that a lot of hubs don't actually support power switching
on their ports.
It would be best to attack your problem by first finding out what's going
wrong. To s
sure usbcore isn't in use, because
the kernel won't let you unload modules that are being used. For usbcore,
this means you first have to unload all the other USB driver modules and
you have to unmount /proc/bus/usb.
Alan Stern
Using Tomcat but need to do more? Need to support web
n qh_completions() does the code even check for -EPROTO?
When the devices are idle, how can qh_completions() possibly have any work
to do at all?
> Is this part of what you're referring to as a high level driver?
No. The higher-level driver is the one that submits URBs. Examples are
On Wed, 5 Jul 2006, Christopher Montgomery wrote:
> On 7/5/06, Alan Stern <[EMAIL PROTECTED]> wrote:
>
> > Ummm... I've lost track of the original question. What is suboptimal and
> > would be painful to fix?
>
> The fact that when I unplug a hub/device the
ou need to do is delay mounting it for some five or six
seconds. Or maybe it doesn't change its mind until after getting a bunch
of READ commands. Who knows?
Alan Stern
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated t
asted
> computation that *is* occurring. I'm not even claiming it's a huge
> problem, just one I'd like to avoid if it's at all easy to do so.
The way to avoid excess computation is to have intr_deschedule() and
periodic_qh_schedule() do less work. There's no need
you experienced are caused by the one
of the hubs not initializing properly.
Alan Stern
Using Tomcat but need to do more? Need to support web services, security?
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On Wed, 5 Jul 2006, Foli Ayivoh wrote:
> Alan Stern wrote:
> >
> > The dump shows that the drive just stopped responding at one spot and then
> > was reset. Sometimes devices do that; nobody seems to know why.
> >
> > The real test is to use CONFIG_USB_STORAG
It depends on the type of hub you use. With some hubs, the program does
indeed simulate unplugging/replugging. With other hubs, it is impossible
to simulate unplugging in software.
Alan Stern
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with p
low-speed devices so they don't need a
high-speed hub.
> Any other ideas about simulating unplugging/plugging using software?
Sorry, it sounds like your hardware does not permit it.
Alan Stern
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly
ld try doing
"rmmod ehci-hcd". This would force everything to run at full-speed or
low-speed, and then maybe the keyboard/hub combination would work better.
Alan Stern
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrate
> cce35c60 3670790155 C Bi:006:06 -104 0
-104 means that the request was cancelled by the computer. Probably
because the device took too long to respond.
Alan Stern
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technolog
trying to
> solve the problem without changing the hardware.
>
> Do you guys think there is a way (even if you don't know wich) to make it
> work without changing the hardware?
I don't know of any way.
Can you just test all your hardware and find combinations of
keyboards
Greg:
What happened to the patch in this message:
http://marc.theaimsgroup.com/?l=linux-usb-devel&m=115133536619214&w=2
? It's not in the current gregkh-all file but it does appear in your USB
git tree at kernel.org.
Alan Stern
Using Tomcat but need to do more? Need to support
along with the active configuration.
The patch also fixes a simple typo (which, oddly enough, doesn't seem to
bother the compiler).
Alan Stern
Signed-off-by: Alan Stern <[EMAIL PROTECTED]>
---
Index: usb-2.6/drivers/
wakeup request arrives on a suspended port rather than when the root hub
itself generates a wakeup request.
Working remote wakeup support is an important part of autoresume and a
prerequisite for autosuspend.
Alan Stern
Signed-off-by: Alan Stern <[EMAIL PROTECTED]>
---
It's easy t
ent version of
libusb provides those features; I haven't actually checked. You certainly
can do them using usbfs directly without libusb.
Alan Stern
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make y
On Fri, 7 Jul 2006, Foli Ayivoh wrote:
> Alan Stern wrote:
> >
> > On Thu, 6 Jul 2006, Foli Ayivoh wrote:
> >
> > > Hi Alan,
> > >
> > > I could not find "boot device" related stuff in the thread!?
> >
> > What? You ment
ugged_ from the hub, and then plug in the keyboard _after_
the computer has finished booting?
Alan Stern
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
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controller, yet they all affect the performance.
Alan Stern
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Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-u
0 3e c0 11 0d 5c f0 3e c0 5b 5d
> c3
> 55 89 e5 57 56 89 ce 53 57 57 89 45 f0 89 55 ec 8b 10 <8b> 1a eb 26 8b 7a f4
> 8d
> 42 f4 ff 75 0c ff 75 08 ff 75 ec 50 ffEIP: []
> __wake_up_common+0x12/0x49 SS:ES
Greg:
Somehow in all the confusion over that long series of patches last
weekend, a few lines of code failed to be removed in usb_uevent(). This
bug causes a nasty hang during bootup as soon as a USB host controller
is probed.
This patch (as744) removes the excess code.
Alan Stern
Signed
me
looks something like "2-3.4:1.0". You can find the existing hub names by
doing
ls /sys/bus/usb/drivers/hub
but then you have to figure out which is the name of the hub you're
interested in.
If that doesn't work, I'll post a program for resetting the hub.
y uncommon, they do occur.
Without this patch the code in 2.6.18-rc1 will fault within an interrupt
handler, which is not nice at all.
Alan Stern
Signed-off-by: Alan Stern <[EMAIL PROTECTED]>
---
Index: usb-2.6/drivers/usb/sto
On Sat, 8 Jul 2006, Andrew Morton wrote:
> On Wed, 28 Jun 2006 11:27:40 -0400 (EDT)
> Alan Stern <[EMAIL PROTECTED]> wrote:
>
> > This patch (as732) adds a usb_device_driver structure, for representing
> > drivers that manage an entire USB device as opposed to just
up?
That speed is normal. The absolute maximum for full-speed USB is 9.28
Mb/s; in practice two-thirds of the maximum is good.
> When write-in my nand flash,the speed is only 4Mbps,is it too slow?
Too slow for what?
Alan Stern
mine too. I'd appreciate a cc when appropriate, thanks.
Next time there's a hot bugfix, I'll be sure to CC you. I apologize for
the waste of time.
Alan Stern
-
Using Tomcat but need to do more? Need to support w
ice's data pins are intermittently making and breaking contact with the
cable's pins. It has nothing to do with the host.
Alan Stern
-
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Get st
er /dev, such as
"/dev/usbdev1.4" -- the two filenames would refer to the same device.
Alan Stern
/* usbreset -- send a USB port reset to a USB device */
#include
#include
#include
#include
#include
#include
int main(int argc, char **argv)
{
const char *filename;
int
Greg:
This patch (as750) adds back a #include line that accidentally got deleted
in that long series of patches last week.
Alan Stern
Signed-off-by: Alan Stern <[EMAIL PROTECTED]>
---
Index: usb-2.6/drivers/usb/core/dr
Dave:
It seems to me that none of the calls to usb_resume_root_hub() below are
really needed. Is there any reason not to remove them?
Alan Stern
Index: usb-2.6/drivers/usb/host/ehci-pci.c
===
--- usb-2.6.orig/drivers/usb/host
suspend - reset - suspend - reset -
> get_device_descriptor - reset - set_address sequence. The observations
> on both these pc's is invariable. If it was a device oddity, then why
> would it behave differently on two different hosts?
I don't know. Have you tried usin
bug, and i don't know whethe it is the bug of
> LH7A404 or usb-storage driver. if you used it normally, please give me
> some suggestion, Thank you!
It is not a problem with usb-storage. It could be a problem with the
LH7A404 host dri
Only in /home/ajain/mm6plus-26/linux/drivers/usb/: devio.c
> Only in /home/ajain/mm6plus-26/linux/drivers/usb/: file.c
Clearly something strange has happened to your ported version. Those
files (buffer.c, config.c, and so on) belong in drivers/usb/core/, not in
drivers/usb/.
Alan Stern
-
but they are not being able to reproduce the bug.
You could try sending them a misbehaving hub/keyboard pair.
> Thank you a lot for helping me, for giving me those codes, for everything!
> If some day I find the answer, I'll post it.
Good luck,
Alan Stern
--
ave one such sniffer, that causes my pc to
> reboot off and on.
There's one available on SourceForge:
http://sourceforge.net/projects/usbsnoop/
Alan Stern
-
Using Tomcat but need to do more? Need to support web ser
g...
> Do you know anything else that could be done?
I just remembered something that _might_ help. This patch:
http://marc.theaimsgroup.com/?l=linux-usb-devel&m=115092788712812&w=2
was submitted too late to appear in 2.6.17. You should try applying to
your kernel,
vious version of FC5 tree,
> if I did not use 'nousb' option the setup process not work).
>
> After the server's reboot, the USB loop problem has not been manifested
> and the server work great!
It would
n D+/gnd D-/gnd.
If you still see the strange behavior with one side eliminated, then you
will know the other side is responsible.
Alan Stern
-
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Get stuf
set, then the system
log will include some very verbose messages telling just what happens. Or
if you build a kernel with CONFIG_DEBUG_FS and CONFIG_USB_MON set, you can
follow the instructions in Documentation/usb/usbmon.txt
s? In my tests, when
asking for a config descriptor Windows always requests either 9 bytes or
the correct total length. When asking for a string descriptor, Windows
often -- but not always! -- requests 255 bytes (the maximum).
> The sequence is always
On Wed, 12 Jul 2006, Frantz, Chris wrote:
> Pete,
>
> Which kernel is running?
>
> A while back, Alan Stern and I worked out a patch for an issue that
> sounds just like this one. The UHCI controller in iLO cannot meet the
> timing requirements of the hub code in kerne
On Tue, 11 Jul 2006, David Brownell wrote:
> On Monday 10 July 2006 9:16 am, Alan Stern wrote:
> > Dave:
> >
> > It seems to me that none of the calls to usb_resume_root_hub() below are
> > really needed. Is there any reason not to remove them?
>
> I'll h
n CONFIG_PM
instead of CONFIG_USB_SUSPEND?
Do you want to change ohci-hcd, giving it a simple "auto-stop"
facility like the one in uhci-hcd rather than an idiosyncratic
autosuspend?
Alan Stern
--
oftware on the device to help survive these
> sorts of circumstances in the future?
Not that I can think of, not without violating the spirit of the USB spec.
It would be better to tackle the shortcomings of the host by fixing the
registering" by keeping a
private flag that you set when the notifier is registered. Then you can
simply skip registering if the flag is already set.
Alan Stern
-
Using Tomcat but need to do more? Need to support web se
m more precisely, try adding a whole
bunch of printk() statements to the quirk_usb_handoff_ohci() function in
drivers/usb/host/pci-quirks.c.
Alan Stern
-
Using Tomcat but need to do more? Need to support web services, security?
Get
; +static int usb_suspend_both(struct usb_device *udev, pm_message_t msg)
> {
> int status = 0;
> int i = 0;
There's no problem with making usb_device_match() static, but I've got a
patch alm
ng similar
> that applies the same principle to the USB cable (not with a 1000V though!).
These rapid repeated disconnects are a kind of stress testing the Linux
USB host code is hardly ever exposed to. It's not surprising that
eventually it would fail.
Alan Stern
-
te wakeup; other
suspend requests must succeed regardless. Also, various error
messages are suppressed if this flag is set, since autosuspend
is expected to fail fairly often.
Okay, this is a lot of mate
probe and
disconnect.
Signed-off-by: Alan Stern <[EMAIL PROTECTED]>
Index: usb-2.6/include/linux/usb.h
===
--- usb-2.6.orig/include/linux/usb.h
+++ usb-2.6/include/linux/usb.h
@@ -19,6 +19,7 @@
#include /*
d-off-by: Alan Stern <[EMAIL PROTECTED]>
---
Index: usb-2.6/drivers/usb/core/hcd.c
===
--- usb-2.6.orig/drivers/usb/core/hcd.c
+++ usb-2.6/drivers/usb/core/hcd.c
@@ -1476,50 +1476,6 @@ int hcd_bus_resume (struct usb_bus *bus)
usb_set_configuration.
Signed-off-by: Alan Stern <[EMAIL PROTECTED]>
Index: usb-2.6/drivers/usb/core/devio.c
===
--- usb-2.6.orig/drivers/usb/core/devio.c
+++ usb-2.6/drivers/usb/core/devio.c
@@ -558,12 +558,13 @@ static int usbde
This patch (as742) adds autosuspend/autoresume support to the USB hub
driver. The largest aspect of the change is that we no longer need a
special flag for root hubs that want to be resumed. Now every hub is
autoresumed whenever khubd needs to access it.
Signed-off-by: Alan Stern <[EM
ile sharing (Samba, NFS, or any other flavor you like) and browse
remotely to your heart's content.
Alan Stern
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vice must not mount it or write to it until the USB
connection is dropped.
If this restriction is too strong, you also have the option of supporting
CDC Ethernet. Then you could configure your device as a network file
server and the host could mount it remotely, us
code and this new subdriver.
Wouldn't it be easy enough to write a user program to send the necessary
command URB via usbfs?
Alan Stern
-
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On Tue, 18 Jul 2006, Matthew Dharm wrote:
> On Tue, Jul 18, 2006 at 05:01:32PM +0100, Daniel Drake wrote:
> > Alan Stern wrote:
> > >Wouldn't it be easy enough to write a user program to send the necessary
> > >command URB via usbfs?
>
> That seems more r
ffecting ADSL modems in the UHCI
driver for 2.6.17. Perhaps it is related to your problem.
The driver in 2.6.18-rc2 seems to work better. Try running that instead.
Alan Stern
-
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dth.
> So if CONFIG_USB_BANDWIDTH is enabled (it is on default kernel
> configuration), there are some urb submits that fail.
The bandwidth allocation in uhci-hcd is completely broken. Nobody should
even try to use it. It's one of the items on my needs-to-be-fixed list.
Alan Stern
nize my hp
> printer.
What does /proc/bus/usb/devices show? Note that you may need to mount
/proc/bus/usb before you can see anything:
mount -t usbfs usbfs /proc/bus/usb
Try turning on CONFIG_USB_DEBUG and rebuilding the kernel. What shows up
in the dmesg log when you turn on the
n. Don't try to use it.
Alan Stern
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opinions on IT & business topics throu
t I would change the details in
storage/usb.c. Check for US_FL_IGNORE_DEVICE in the get_device_info()
routine, and make that routine return int instead of void. If the flag is
present you can simply return -ENODEV. Then in storage_probe(), you check
the return code and jump to BadDevice if it's non
e let me know how shall I procede.
If you're not using udev then you may need to run the MAKEDEV script or
something equivalent. Tell it to create the sd[a-z]... device entries.
Alan Stern
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t; /dev.
What happens when you run "mount"?
Turn on CONFIG_USB_DEBUG and CONFIG_USB_STORAGE_DEBUG, and rebuild the
USB drivers. Then what shows up in the dmesg log when you run "mount"?
Alan Stern
-
Take Surv
uot;inconsistent lock state" message involves
the UHCI controller as well as the OHCI controller. And ironically, the
error has nothing to do with the fact that a PCMCIA card was ejected.
It could have happened any time a USB controller was turned off.
Does the following patch help?
Alan
n expected sort of
error), but otherwise don't treat it specially.
Alan Stern
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o
ew root-hub
polling scheme since it is conditional on (!hcd->uses_new_polling). A
few other changes would be needed as well, nothing serious.
At any rate, it's obvious that the problem was caused when
usb_rh_urb_dequeue() unconditionally re-enabled interrupts. My patch
t; return USB_STOR_XFER_ERROR;
>
> /* babble - the device tried to send more than we wanted to read */
>
> As see, this makes this check meaningful. I need to do something about it.
Isn't it true that whenever this error occurs, usb-sto
re especially tricky because they
> need to defend against concurrent unlink from hcd_driver.remove (which is
> what rmmod does, also pccardd in Matthias' case), usb_driver unlink calls,
> and khubd cleanup during usb device unplug. Yes, worst case there can
> be three CPUs raci
ntrol URB was
running. Do you think it would be safe, given how non-standardized those
HCD methods are?
Alan Stern
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The new location you found is in the driver core, and a bug was fixed in
that region just about at the same time as you ran your test. You might
try redoing everything with the current -mm tree plus hotfixes.
And try running each test a few times. If there is a race, you could get
differe
ably right about
treating -ETIME errors with default handlers. In fact, there are plenty
of places that test for EPROTO and/or EILSEQ where it's not really to any
advantage.
Did you check for any places where ETIMEDOUT actually should be changed to
ETIME (or remove
On Wed, 26 Jul 2006, David Brownell wrote:
> On Wednesday 26 July 2006 8:29 am, Alan Stern wrote:
> > On Wed, 26 Jul 2006, David Brownell wrote:
> >
> > > > The patch uses spin_lock_irqsave() and spin_unlock_irqrestore() along
> > > > with
> > >
artman <[EMAIL PROTECTED]>
>
> :04 04 879a23a817afb7237bb79a24d2b80ebf66ec52cd
> a9f43bad474a0d1877db24a11282427e863a2718 Mdrivers
> :04 04 167350de305feb4e79d2656f00b28475461405ce
> e2957848b084cce6cbab275
Greg and Pete:
usbmon crashed when I tried using it with dummy-hcd, because it doesn't
check whether the bus's controller actually does use DMA before trying to
map the buffer. This patch (as755) fixes it.
Alan Stern
Signed-off-by: Alan Stern <[EMAIL PROTECTED]>
---
Index
e() and spin_unlock_irqrestore() along with
a call to wait_event(). What happens if you end up calling wait_event()
with interrupts disabled? Would it be better simply to spin?
Alan Stern
-
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t; Well i come to think that maybe is a HAL problem. I have just read a
> blog entry by HAL mantainer saying that i has just released a new
> version of HAL with patches by Kay Sievers to make it work again with
> kernels newer than 2.6.17.
That certainly could explain part
On Wed, 26 Jul 2006, Pete Zaitcev wrote:
> On Tue, 25 Jul 2006 17:11:56 -0400 (EDT), Alan Stern <[EMAIL PROTECTED]>
> wrote:
>
> > > + /*
> > > + * A timeout could have happened becasue we reloaded and
> > > + * inherited a n
Greg:
This patch (as756) fixes a bug in dummy-hcd found by the lockdep checker.
In one of the code paths, the driver did not disable interrupts before
calling a request completion routine.
Alan Stern
Signed-off-by: Alan Stern <[EMAIL PROTECTED]>
---
Index: usb-2.6/drivers/usb/
uot;
> > + "the baudrate requested (fix it)\n");
> > break;
>
> This segment looks ok.
Actually it's not. There's no space character between "support" and
"the" in the final string.
Alan
n other than the source code. Try reading
sl811-hcd.c or isp116x-hcd.c; they are relatively simple self-contained
drivers.
> What's the purpose of generic hcd driver?
Its purpose is to provide the common features needed by all HCDs.
Alan Stern
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