bus registered, assigned bus number 2
ohci_hcd :00:01.4: irq 167, io mem 0x1000
If you want to get useful information from the system log, you have to
turn on CONFIG_USB_DEBUG.
Alan Stern
-
Take Surveys. Earn Cash
On Tue, 13 Feb 2007, Jon Smirl wrote:
On 2/13/07, Alan Stern [EMAIL PROTECTED] wrote:
It's possible that after resuming, the device is still functional but in
some weird state. Perhaps sending it the right sort of HID messages would
get it fully working again. But I don't want to mess
occurs.
Talk to the maintainer of the usb audio driver -- that's where support
needs to be added for the suspend, resume, pre_reset, and post_reset
methods.
Alan Stern
-
Take Surveys. Earn Cash. Influence the Future of IT
Join
/state
and see what happens when you plug in or remove a device.
Alan Stern
-
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share your
opinions
This patch (as850b) disables remote wakeup (and everything else!) on
all EHCI ports when the shutdown() method is called. If remote wakeup
is left active then some systems will reboot instead of powering off.
This fixes Bugzilla #7828.
Signed-off-by: Alan Stern [EMAIL PROTECTED]
Cc: David
sending it the right sort of HID messages would
get it fully working again. But I don't want to mess around with
experimenting and writing all sorts of special-purpose programs to test it
-- particularly since a simple reset will do the job.
Alan Stern
to put the
above call at some other place in the suspend process?
I can try to dig other information out of the traces, if someone tells
me what to look for.
Anything you can't understand...
Alan Stern
-
Using Tomcat
.
For example, setting it to (HZ*60) will cause the suspend to happen only
after 60 seconds of inactivity.
Or you can prevent USB devices from being suspended entirely by turning
off the CONFIG_USB_SUSPEND setting.
Alan Stern
-
Using
the problem. It's good to have a reliable test case, thanks.
Below is a revised version of the diagnostic patch. Try using it instead
of the earlier one and let's see what happens.
Alan Stern
Index: 2.6.20/drivers/usb/host/uhci-hub.c
On Tue, 13 Feb 2007, Jon Smirl wrote:
On 2/13/07, Jon Smirl [EMAIL PROTECTED] wrote:
On 2/13/07, Alan Stern [EMAIL PROTECTED] wrote:
It's possible that after resuming, the device is still functional but in
some weird state. Perhaps sending it the right sort of HID messages would
get
accesses to be treated as if they
were unaligned, even when the programmer knew they were not.
Then there's the pragmatic reason: A lot of code has already been written
and would all need to be changed over.
Alan Stern
really think it is needed.
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.
Download IBM WebSphere
special is needed, but
getting the locking just right requires a good deal of care; you have to
worry about the BKL in addition to the driver's own io_mutex.
Alan Stern
-
Using Tomcat but need to do more? Need to support web
ohci-s3c2410.c patch seems to work fine without
it.
No, it isn't necessary. IMO it should be removed from those other
drivers. On the other hand, David Brownell said that it should be left in
since it does no real harm.
My advice is not to add in new unnecessary code.
Alan Stern
is a little more complicated than the other two because it also
supports autosuspend.
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
a special driver.
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.
Download IBM WebSphere Application Server v.1.0.1
the corresponding userspace-visible declaration
in usbdevice_fs.h?
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
be signed.
Please feel free to fix it.
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.
Download IBM WebSphere
?
There are other ways to resume them from userspace. Opening a device's
usbfs file will do it, for instance. (Running lsusb resumes _every_ USB
device.) Or simply trying to use the device, since it will resume on
demand.
Alan Stern
URBs does make
a very small (10%?) difference in performance, and staring at usbmon, it
appears that sometimes I do in fact get multiple callbacks from the same
frame. But it's quite rare...
Bus analysis is the way to go.
Alan Stern
ether.c.
It would be enough to have the line say:
req-zero = value wLength;
as in zero.c.
Alan Stern
-
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly
On Fri, 9 Feb 2007, Oliver Neukum wrote:
Am Donnerstag, 8. Februar 2007 17:09 schrieb Alan Stern:
You shouldn't call usb_autopm_get_interface(). The changes it makes are
lost when the driver fails to bind to the interface. You should call
usb_autopm_resume_device() instead
On Fri, 9 Feb 2007, Sergei Organov wrote:
Alan Stern [EMAIL PROTECTED] writes:
On Thu, 8 Feb 2007, Sergei Organov wrote:
IMHO aligned(N) should be used in portable code only to *increase*
alignment (this effectively excludes usage of 'packed'), and then the
alignment won't affect
for a single URB.
From what you wrote, it looked as though you may have misunderstood this.
Alan Stern
-
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated
,
which I haven't ever tried to use.
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.
Download IBM WebSphere
the performance of a host controller + USB device combination.
One way is to use dd to transfer a large amount of data to or from the
device, and see what the throughput is.
Alan Stern
-
Using Tomcat but need to do more? Need
source file
Documentation/usb/usbmon.txt) to see what's really happening.
[And please instruct your email client to wrap lines at 74 columns or
thereabouts.]
Alan Stern
-
Using Tomcat but need to do more? Need to support web
.
Improve some comment texts.
Don't log the quirks value if it is 0.
Make sysfs display the quirks value in hexadecimal, which
will be more informative.
Signed-off-by: Alan Stern [EMAIL PROTECTED]
---
Index: usb-2.6/drivers/usb/core/message.c
, posted a few minutes ago.
Alan Stern
Index: usb-2.6/fs/sysfs/file.c
===
--- usb-2.6.orig/fs/sysfs/file.c
+++ usb-2.6/fs/sysfs/file.c
@@ -516,6 +516,30 @@ int sysfs_create_file(struct kobject * k
/**
+ * sysfs_add_file_to_group
it will wake up
fully... but a reset works just as well.
This looks like a prime candidate for a quirks entry. I will create one
later on. And I'll mail the device back early next week.
Alan Stern
-
Using Tomcat but need to do more
not suspending devices. I am managing vetos.
Call it what you will; the effect is the same.
Alan Stern
-
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated
, keep it as long as you think it will be useful. Stick some
speakers on it and check it out, it sounds way better than typical
motherboard audio. Not bad for $40.
Okay, we'll see what happens.
Alan Stern
-
Using Tomcat
the resume event up the stack to wherever this control
software is, and the control software is confused about what state it
in?
As far as I can tell, nothing at all gets reported up the stack. Maybe
the usbhid driver needs to do a Get-Report as part of its resume
processing.
Alan Stern
On Fri, 9 Feb 2007, Oliver Neukum wrote:
Am Freitag, 9. Februar 2007 23:12 schrieb Alan Stern:
Firstly, cool.
I'll look at it closer again, but just some first comments.
+static ssize_t
+set_autosuspend(struct device *dev, struct device_attribute *attr,
+ const char
On Fri, 9 Feb 2007, Jon Smirl wrote:
On 2/9/07, Alan Stern [EMAIL PROTECTED] wrote:
Are you certain? The mute button is on the top front edge, but the light
appears about 2/3 of the way up the front side. (There may be another
light right on the mute button as well; I can't remember
arrived. I know for certain,
because the host received an ACK in response -- it's in your usbmon log.
Probably you were misled because the Set-Interface request cleared the
FX2's EP.
Alan Stern
-
Using Tomcat but need to do
On Wed, 7 Feb 2007, Pete Zaitcev wrote:
Alan, do you happen to know how much usb_iso_packet_descriptor thingies
we allocate typically? One? Three? Tens? A hundred? In usbfs we allow 128.
If we routinely get lots of them per URB then I need to rethink the line
format and all other things. It's
that the pointer to the device may become invalid.
Here's the fix.
A good example of the dangers of relying on BKL for anything serious.
Alan Stern
-
Using Tomcat but need to do more? Need to support web services, security?
Get stuff
On Wed, 7 Feb 2007, Alan Stern wrote:
This patch (as850) disables remote wakeup on EHCI ports when the
shutdown() method is called. If it is left active then some systems
will reboot instead of powering off. This solves Bugzilla #7828.
I'm having second thoughts about this patch.
First
complicated than necessary.
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.
Download IBM WebSphere Application
to the interface. You should call
usb_autopm_resume_device() instead -- unfortunately it isn't EXPORTed.
Alan Stern
-
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre
make
up your own.)
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.
Download IBM WebSphere Application Server
= value w_length
+ (value % gadget-ep0-maxpacket) == 0;
value = usb_ep_queue (gadget-ep0, req, GFP_ATOMIC);
if (value 0) {
DBG (dev, ep_queue -- %d\n, value);
Alan Stern
://marc.theaimsgroup.com/?l=linux-usb-develm=117019834316197w=2
which is nearly identical to Andrew's.
Alan Stern
-
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology
again, not concurrently.
For more information, read the kerneldoc in the source file
drivers/usb/core/urb.c.
Alan Stern
-
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly
autosuspend_delay values.
All this in addition to the standard device-wide autosuspend delay, which
will also be settable via sysfs. The initial timeout value should be set
to the maximum of the device-wide delay and the interface delays.
Is that right?
Alan Stern
-storage device. They are meant to be used only with devices which
support the special bulk-echo testing protocol.
That induces an endpoint error at our
hostcontroller layer.I think this may be the reason if i am not
wrong.Please guide me in this.
You are correct.
Alan Stern
This patch (as851) fixes a bug introduced when the USB ID matching
code was refactored. If any of the device-level matches fail we
should reject right away. Instead, when none of the device-level
matches fail the current code accepts right away.
Signed-off-by: Alan Stern [EMAIL PROTECTED
more complicated than that but you get
the idea) and partly because the callbacks tend to occur while handling
USB controller hardware interrupt requests, which cannot be nested.
Alan Stern
-
Using Tomcat but need to do more
to encompass all the packets in the
descriptor list (although usbcore doesn't bother to check for that),
because transfer_buffer_length is used in setting up the DMA mapping.
Alan Stern
-
Using Tomcat but need to do more
consider the alignment attribute to be part of the type, then
you can indeed express 16-bit-little-endian-unsigned-integer-unaligned
as a C type. In fact __le16 expresses it perfectly all except for the
unaligned part, which you agree doesn't belong in the type.
Alan Stern
member. That
really can't be done.
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.
Download IBM WebSphere
timeout value should be set
to the maximum of the device-wide delay and the interface delays.
Is that right?
Yes.
Okay, I'll work on it.
Alan Stern
-
Using Tomcat but need to do more? Need to support web services
On Thu, 8 Feb 2007, Phil Endecott wrote:
Alan Stern wrote:
On Thu, 8 Feb 2007, Phil Endecott wrote:
From a
higher-level (source code) point of view, the alignment doesn't affect
the
set of operations which can be applied to the data type.
It affects whether you can legally
to send a zillion IN tokens only to have the device
send a zillion NAKs: it'd suck up bandwidth that could be useful to
other devices on the bus.
If you don't care very much about throughput, that's fine.
Alan Stern
handling like this, there is no way
to unconfigure these non-compliant devices.
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
to work as before.
This way using the maximum delay value should do exactly what you want.
Right?
Alan Stern
-
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre
, the device itself may choose not to report wakeup events. If
it isn't configured, for instance, it won't report anything.
Alan Stern
-
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done
below needed? If yes, I'll send it with a proper patch
comment and S-O-B.
Alan Stern
Index: usb-2.6/drivers/usb/core/driver.c
===
--- usb-2.6.orig/drivers/usb/core/driver.c
+++ usb-2.6/drivers/usb/core/driver.c
@@ -415,8 +415,8
(), get_unaligned_be32(), get_unaligned_be64(),
and the corresponding put_unaligned...() things?
But for some unclear reason people weren't in favor of it. And as a
result, the kernel is filled with roll-your-own versions of these things.
Alan Stern
On Wed, 7 Feb 2007, Greg KH wrote:
On Wed, Feb 07, 2007 at 12:53:31PM -0500, Alan Stern wrote:
Greg:
When you refactored the USB device-matching code, you may have introduced
a bug. Does it seem reasonable that an entry might contain both
device-specific and interface-specific
On Wed, 7 Feb 2007, Oliver Neukum wrote:
Am Mittwoch, 7. Februar 2007 18:40 schrieb Alan Stern:
On Wed, 7 Feb 2007, Oliver Neukum wrote:
So the answer would not be the largest delay, but the largest delay
currently requested to be active.
We haven't yet defined how a driver can
!)
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.
Download IBM WebSphere Application Server v.1.0.1 based
This patch (as850) disables remote wakeup on EHCI ports when the
shutdown() method is called. If it is left active then some systems
will reboot instead of powering off. This solves Bugzilla #7828.
Signed-off-by: Alan Stern [EMAIL PROTECTED]
---
Index: usb-2.6/drivers/usb/host/ehci-hcd.c
* for spin locks.
Locks are used to guarantee that nobody sees an inconsistent state.
Therefore memory ordering must be ensured.
Documentation/io_ordering.txt
Not to mention Documentation/memory_barriers.txt and
Documentation/atomic_ops.txt.
Alan Stern
something like the patch below added instead of
your idle timer. (Note: not even compile-tested!)
With this infrastructure in place, all you have to do is
set_bit(USB_DF_DEVICE_BUSY, hid_to_usb_dev(hid)-dflags);
whenever an event occurs. No messing around with extra timers.
Alan Stern
architectures cannot do DMA to stack
memory.
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.
Download IBM
of the delays. Does that sound right?
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.
Download IBM WebSphere
This patch (as849) fixes a bug in the USB hub driver. A single
pre-allocated buffer is used for all port status reads, but nothing
guarantees exclusive use of the buffer. A mutex is added to provide
this guarantee.
Signed-off-by: Alan Stern [EMAIL PROTECTED]
---
This patch should go
are not shielded
well. But I don't have better ideas.
Another possibility is a recently-discovered bug in the USB core. Here is
a patch to fix the bug; perhaps it will help solve your problem:
http://marc.theaimsgroup.com/?l=linux-usb-develm=117068738929326w=2
Alan Stern
Someone who knows about PCI and EHCI may be able to answer this...
It's odd that the enumeration fails partway through instead of right at
the beginning.
Alan Stern
-- Forwarded message --
Date: Sun, 04 Feb 2007 14:20:52 -0500
From: [EMAIL PROTECTED]
To: linux-usb-users
, and it doesn't seem worthwhile to allocate permanently one URB per
hub if it will hardly ever be used.
Prakash, here's an alternative patch. It should work just as well as the
previous one (don't try to apply them both!).
Alan Stern
Index: usb-2.6/drivers/usb/core/hub.c
to be fixed,
none of them are directly connected with the kernel.
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
On Sun, 4 Feb 2007, Prakash Punnoor wrote:
Am Sonntag 04 Februar 2007 schrieb Alan Stern:
Prakash, here's an alternative patch. It should work just as well as the
previous one (don't try to apply them both!).
Seems to work fine for me. Nice work! Out of curiousity. Did the git-bisect
.
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.
Download IBM WebSphere Application Server v.1.0.1 based
On Sun, 4 Feb 2007, Oliver Neukum wrote:
Am Sonntag, 4. Februar 2007 17:07 schrieb Alan Stern:
On Sat, 3 Feb 2007, Oliver Neukum wrote:
If you want simplicity, I'd suggest serialization. kmalloc for 4 bytes
is overkill. I think it is even faster if we block on the cases there's
.
The dropped events may already be listed in the s file, but usually
people copy only the t file, and in case correlating the two isn't as
easy as seeing the information right there. Having an in-line indication
of dropouts could help a lot in debugging tricky problems.
Alan Stern
On Sat, 3 Feb 2007, Prakash Punnoor wrote:
Am Freitag 02 Februar 2007 schrieb Alan Stern:
When you have a chance, please try hooking the scanner up to that bad hub
port again, and use the usbmon facility. Instructions are in the kernel
source file Documentation/usb/usbmon.txt. Start
On Sat, 3 Feb 2007, Pete Zaitcev wrote:
On Sat, 3 Feb 2007 11:43:50 -0500 (EST), Alan Stern [EMAIL PROTECTED] wrote:
Here's an idea for an improvement to the text interface in usbmon which
should be easy to implement. I'd like to know for certain when and where
events are missing from
seeing.
Alan Stern
Index: usb-2.6/drivers/usb/core/hub.c
===
--- usb-2.6.orig/drivers/usb/core/hub.c
+++ usb-2.6/drivers/usb/core/hub.c
@@ -1422,18 +1422,24 @@ static int hub_port_status(struct usb_hu
On Sat, 3 Feb 2007, Oliver Neukum wrote:
Am Samstag, 3. Februar 2007 23:02 schrieb Alan Stern:
Obviously we can't afford to use a single dedicated buffer like this.
Each thread reading a hub's port status will have to provide its own
buffer, or more simply, we will have to allocate
the scanner up to that bad hub
port again, and use the usbmon facility. Instructions are in the kernel
source file Documentation/usb/usbmon.txt. Start acquiring the usbmon log
before running sane, and stop it after sane has failed.
Alan Stern
. This looks like one of them.
What happens if you use the same card and reader under another operating
system?
Alan Stern
-
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre
On Fri, 2 Feb 2007, Prakash Punnoor wrote:
Am Freitag 02 Februar 2007 schrieb Alan Stern:
When you have a chance, please try hooking the scanner up to that bad hub
port again, and use the usbmon facility. Instructions are in the kernel
source file Documentation/usb/usbmon.txt. Start
never succeed.
Signed-off-by: Alan Stern [EMAIL PROTECTED]
---
Index: usb-2.6/drivers/usb/core/hub.c
===
--- usb-2.6.orig/drivers/usb/core/hub.c
+++ usb-2.6/drivers/usb/core/hub.c
@@ -1902,6 +1902,7 @@ static int hub_suspend(struct
This patch (as848) adds a useful little debugging message to let us
know when ehci-hcd's bus_suspend method runs. The other HCDs have
similar messages; now ehci-hcd doesn't need to feel left out.
Signed-off-by: Alan Stern [EMAIL PROTECTED]
---
Index: usb-2.6/drivers/usb/host/ehci-hub.c
precedence?
How does this sound?
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.
Download IBM WebSphere
On Wed, 31 Jan 2007, Dirk Eddelbuettel wrote:
Alan Stern stern at rowland.harvard.edu writes:
In fact, it's possible that these problems are caused by bad USB cable
connections. They certainly could result in intermittent disconnects.
We tried two factory new cables that came
Greg, see below...
On Thu, 1 Feb 2007, Oliver Neukum wrote:
Am Donnerstag, 1. Februar 2007 15:51 schrieb Alan Stern:
On Wed, 31 Jan 2007, Oliver Neukum wrote:
This would call mod_timer() for every completed in-URB. Are you
sure this is better than an approach maintaining a periodical
, code that relies on getting an error from usb_uhci? I don't
think people write drivers like that. They prefer to avoid errors.
Alan Stern
-
Using Tomcat but need to do more? Need to support web services, security?
Get stuff
with start-up tasks
and other initializations and 2 seconds is just not enough time.
If the user could put usbcore.autosuspend_delay=60 on the boot command
line, then it would be possible to prevent some devices from being
autosuspended.
Alan Stern
P.S.: Nowadays we're supposed to use
to use
rather than || ? The idea being, I presume, that the last partition
will extend only as far as a pseudo-cylinder boundary.
Alan Stern
-
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay
from being loaded in the first place.
That would certainly solve the problem. :-)
Alan Stern
-
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share your
hand, you start with autosuspend turned off and then turn it on, none of
your idle devices will get autosuspended until some event restarts their
autosuspend timers. You would have to run lsusb or do something similar.
Alan Stern
is divisible by 63*255 = 16065. The way
you're doing it, a capacity of 5355 would pass the test even though it
shouldn't.
This patch is a result of despair, I am running out of solutions.
Some problems are best left unsolved...
Alan Stern
the advantages or
disadvantages?
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.
Download IBM WebSphere
This patch (as845) cleans up some fallout from the removal of the
usbcore bandwidth machinery.
Signed-off-by: Alan Stern [EMAIL PROTECTED]
---
Note that Andrew Morton has already applied the first hunk to the -mm
tree.
Alan Stern
Index: usb-2.6/drivers/isdn/gigaset/bas-gigaset.c
it, or from what you can else see in the dmesg?
Turn on CONFIG_PM_SYSFS_DEPRECATED in your kernel build of 2.6.19. After
booting and plugging in the USB HD, rmmod usb-storage. Then do
echo -n 2 /sys/bus/usb/devices/usb1/power/state
That will force the root hub to suspend.
Alan Stern
of this device. You seem
to want the kernel to load your tape driver even when the device is in its
floppy state. That isn't going to happen; when the kernel sees a floppy
device it will load a floppy driver, not a tape driver.
Alan Stern
be
created?
Alan Stern
-
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share your
opinions on IT business topics through brief surveys - and earn cash
http
901 - 1000 of 6192 matches
Mail list logo
