When adding the ID of a composite device dynamically to a driver, all
hitherto unbound interfaces are bound to this driver regardless of their
class, which may not be intended.
The patch adds the option to tell the targeted interface class to a driver
via the "new_id" attribute, in addition to the device ID.
Also, it appends the ABI documentation accordingly.
Example:
$ echo "1234 2a2a ff" >/sys/bus/usb-serial/drivers/option1/new_id
will bind only vendor-specific interfaces to the 3G driver.
Signed-off-by: Josua Dietze <digidietze@draisberghof.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
The HCD_FLAG_SAW_IRQ flag was introduced in order to catch IRQ routing
errors: If an URB was unlinked and the host controller hadn't gotten
any IRQs, it seemed likely that the IRQs were directed to the wrong
vector.
This warning hasn't come up in many years, as far as I know; interrupt
routing now seems to be well under control. Therefore there's no
reason to keep the flag around any more. This patch (as1495) finally
removes it.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux: (230 commits)
Revert "tracing: Include module.h in define_trace.h"
irq: don't put module.h into irq.h for tracking irqgen modules.
bluetooth: macroize two small inlines to avoid module.h
ip_vs.h: fix implicit use of module_get/module_put from module.h
nf_conntrack.h: fix up fallout from implicit moduleparam.h presence
include: replace linux/module.h with "struct module" wherever possible
include: convert various register fcns to macros to avoid include chaining
crypto.h: remove unused crypto_tfm_alg_modname() inline
uwb.h: fix implicit use of asm/page.h for PAGE_SIZE
pm_runtime.h: explicitly requires notifier.h
linux/dmaengine.h: fix implicit use of bitmap.h and asm/page.h
miscdevice.h: fix up implicit use of lists and types
stop_machine.h: fix implicit use of smp.h for smp_processor_id
of: fix implicit use of errno.h in include/linux/of.h
of_platform.h: delete needless include <linux/module.h>
acpi: remove module.h include from platform/aclinux.h
miscdevice.h: delete unnecessary inclusion of module.h
device_cgroup.h: delete needless include <linux/module.h>
net: sch_generic remove redundant use of <linux/module.h>
net: inet_timewait_sock doesnt need <linux/module.h>
...
Fix up trivial conflicts (other header files, and removal of the ab3550 mfd driver) in
- drivers/media/dvb/frontends/dibx000_common.c
- drivers/media/video/{mt9m111.c,ov6650.c}
- drivers/mfd/ab3550-core.c
- include/linux/dmaengine.h
Originally, the runtime PM core would send an idle notification
whenever a suspend attempt failed. The idle callback routine could
then schedule a delayed suspend for some time later.
However this behavior was changed by commit
f71648d73c (PM / Runtime: Remove idle
notification after failing suspend). No notifications were sent, and
there was no clear mechanism to retry failed suspends.
This caused problems for the usbhid driver, because it fails
autosuspend attempts as long as a key is being held down. A companion
patch changes the PM core's behavior, but we also need to change the
USB core. In particular, this patch (as1493) updates the device's
last_busy time when an autosuspend fails, so that the PM core will
retry the autosuspend in the future when the delay time expires
again.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Henrik Rydberg <rydberg@euromail.se>
Cc: <stable@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
With module.h being implicitly everywhere via device.h, the absence
of explicitly including something for EXPORT_SYMBOL went unnoticed.
Since we are heading to fix things up and clean module.h from the
device.h file, we need to explicitly include these files now.
Use the lightweight version of the header that has just THIS_MODULE
and EXPORT_SYMBOL variants.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
* 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (63 commits)
PM / Clocks: Remove redundant NULL checks before kfree()
PM / Documentation: Update docs about suspend and CPU hotplug
ACPI / PM: Add Sony VGN-FW21E to nonvs blacklist.
ARM: mach-shmobile: sh7372 A4R support (v4)
ARM: mach-shmobile: sh7372 A3SP support (v4)
PM / Sleep: Mark devices involved in wakeup signaling during suspend
PM / Hibernate: Improve performance of LZO/plain hibernation, checksum image
PM / Hibernate: Do not initialize static and extern variables to 0
PM / Freezer: Make fake_signal_wake_up() wake TASK_KILLABLE tasks too
PM / Hibernate: Add resumedelay kernel param in addition to resumewait
MAINTAINERS: Update linux-pm list address
PM / ACPI: Blacklist Vaio VGN-FW520F machine known to require acpi_sleep=nonvs
PM / ACPI: Blacklist Sony Vaio known to require acpi_sleep=nonvs
PM / Hibernate: Add resumewait param to support MMC-like devices as resume file
PM / Hibernate: Fix typo in a kerneldoc comment
PM / Hibernate: Freeze kernel threads after preallocating memory
PM: Update the policy on default wakeup settings
PM / VT: Cleanup #if defined uglyness and fix compile error
PM / Suspend: Off by one in pm_suspend()
PM / Hibernate: Include storage keys in hibernation image on s390
...
To add USB 3.0 link power management (LPM), we need to know what the U1
and U2 exit latencies are for the xHCI host controller. External USB 3.0
hubs report these values through the SuperSpeed Capabilities descriptor in
the BOS descriptor. Make the USB 3.0 roothub for the xHCI host behave
like an external hub and return the BOS descriptors.
The U1 and U2 exit latencies will vary across each host controller, so we
need to dynamically fill those values in by reading the exit latencies out
of the xHC registers. Make the roothub code in the USB core handle
hub_control() returning the length of the data copied.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* pm-runtime:
PM / Tracing: build rpm-traces.c only if CONFIG_PM_RUNTIME is set
PM / Runtime: Replace dev_dbg() with trace_rpm_*()
PM / Runtime: Introduce trace points for tracing rpm_* functions
PM / Runtime: Don't run callbacks under lock for power.irq_safe set
USB: Add wakeup info to debugging messages
PM / Runtime: pm_runtime_idle() can be called in atomic context
PM / Runtime: Add macro to test for runtime PM events
PM / Runtime: Add might_sleep() to runtime PM functions
My webcam is a Logitech C300 and I get "chipmunk"ed squeaky sound.
The following trivial patch fixes it.
Signed-off-by: Jon Levell <linuxusb@coralbark.net>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Add to the dev_state and alloc_async structures the user namespace
corresponding to the uid and euid. Pass these to kill_pid_info_as_uid(),
which can then implement a proper, user-namespace-aware uid check.
Changelog:
Sep 20: Per Oleg's suggestion: Instead of caching and passing user namespace,
uid, and euid each separately, pass a struct cred.
Sep 26: Address Alan Stern's comments: don't define a struct cred at
usbdev_open(), and take and put a cred at async_completed() to
ensure it lasts for the duration of kill_pid_info_as_cred().
Signed-off-by: Serge Hallyn <serge.hallyn@canonical.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
"length" is type size_t so the cast to unsigned int truncates the
upper bytes. This isn't an issue in real life (I've checked the
callers) but it's a bit messy.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch (as1487) improves the usbcore debugging output for port
suspend and bus suspend, by stating whether or not remote wakeup is
enabled.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
In the usb printer class specific request get_device_id the value of
wIndex is (interface << 8 | altsetting) instead of just interface.
This enables the detection of some printers with libusb.
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Matthias Dellweg <2500@gmx.de>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Alan Stern points out that after spin_unlock(&ps->lock) there is no
guarantee that ps->pid won't be freed. Since kill_pid_info_as_uid() is
called after the spin_unlock(), the pid passed to it must be pinned.
Reported-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Serge Hallyn <serge.hallyn@canonical.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch (as1486) implements the kernel's new wakeup policy for USB
host controllers. Since they don't generate wakeup requests on their
but merely forward requests from their root hubs toward the CPU, they
should be enabled for wakeup by default.
Also, to be compliant with both the old and new policies, root hubs
should not be enabled for remote wakeup by default. Userspace must
enable it explicitly if it is desired.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch adds sysfs support to xHCI usb2 hardware LPM, so developer can
enable and disable usb2 hardware LPM manually for test purpose.
Signed-off-by: Andiry Xu <andiry.xu@amd.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
If the device pass the USB2 software LPM and the host supports hardware
LPM, enable hardware LPM for the device to let the host decide when to
put the link into lower power state.
If hardware LPM is enabled for a port and driver wants to put it into
suspend, it must first disable hardware LPM, resume the port into U0,
and then suspend the port.
Signed-off-by: Andiry Xu <andiry.xu@amd.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Check device's LPM capability by examining the bmAttibutes field of the
USB2.0 Extension Descriptor.
Signed-off-by: Andiry Xu <andiry.xu@amd.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit gets BOS(Binary Device Object Store) descriptor set for Super
Speed devices and High Speed devices which support BOS descriptor.
BOS descriptor is used to report additional USB device-level capabilities
that are not reported via the Device descriptor. By getting BOS descriptor
set, driver can check device's device-level capability such as LPM
capability.
Signed-off-by: Andiry Xu <andiry.xu@amd.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
When a hot reset (standard USB port reset) fails on a USB 3.0 port, the
host controller transitions to the "Error" state. It reports the port
link state as "Inactive", sets the link state change flag, and (if the
device disconnects) also reports the disconnect and connect change status.
It's also supposed to transition the link state to "RxDetect", but the NEC
µPD720200 xHCI host does not.
Unfortunately, Harald found that the combination of the NEC µPD720200 and
a LogiLink USB 3.0 to SATA adapter triggered this issue. The USB core
would reset the device, the port would go into this error state, and the
device would never be enumerated. This combination works under Windows,
but not under Linux.
When a hot reset fails on a USB 3.0 port, and the link state is reported
as Inactive, fall back to a warm port reset instead. Harald confirms that
with a warm port reset (along with all the change bits being correctly
cleared), the USB 3.0 device will successfully enumerate.
Harald also had to add two other patches ("xhci: Set change bit when warm
reset change is set." and "usbcore: refine warm reset logic") to make this
setup work. Since the warm reset refinement patch is not destined for the
stable kernels (it's too big), this patch should not be backported either.
This fixes https://bugzilla.kernel.org/show_bug.cgi?id=41752
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Tested-by: Harald Brennich <harald.brennich@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Current waiting time for warm(BH) reset in hub_port_warm_reset() is too short
for xHC host to complete the warm reset and report a BH reset change.
This patch increases the waiting time for warm reset and merges the function
into hub_port_reset(), so it can handle both cold reset and warm reset, and
factor out hub_port_finish_reset() to make the code looks cleaner.
This fixes the issue that driver fails to clear BH reset change and port is
"dead".
Signed-off-by: Andiry Xu <andiry.xu@amd.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
The new runtime PM code has shown that many webcams suffer
from a race condition that may crash them upon resume.
Runtime PM is especially prone to show the problem because
it retains power to the cameras at all times. However
system suspension may also crash the devices and retain
power to the devices.
The only way to solve this problem without races is in
usbcore with the RESET_RESUME quirk.
Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
In a few places in the kernel, the code prints
a human-readable USB device speed (eg. "high speed").
This involves a switch statement sometimes wrapped
around in ({ ... }) block leading to code repetition.
To mitigate this issue, this commit introduces
usb_speed_string() function, which returns
a human-readable name of provided speed.
It also changes a few places switch was used to use
this new function. This changes a bit the way the
speed is printed in few instances at the same time
standardising it.
Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
A return value of -EINPROGRESS from pm_runtime_get indicates that
the device is already resuming due to a previous call. Internally,
usb_autopm_get_interface_async doesn't treat this as an error and
increments the usage count, but passes the error status along
to the caller. The logical assumption of the caller is that
any negative return value reflects the device not resuming
and the pm_usage_cnt not being incremented. Since the usage count
is being incremented and the device is resuming, return success (0)
instead.
Signed-off-by: James Wylder <james.wylder@motorola.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Now ${LINUX}/drivers/usb/* can use usb_endpoint_maxp(desc) to get maximum packet size
instead of le16_to_cpu(desc->wMaxPacketSize).
This patch fix it up
Cc: Armin Fuerst <fuerst@in.tum.de>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Johannes Erdfelt <johannes@erdfelt.com>
Cc: Vojtech Pavlik <vojtech@suse.cz>
Cc: Oliver Neukum <oliver@neukum.name>
Cc: David Kubicek <dave@awk.cz>
Cc: Johan Hovold <jhovold@gmail.com>
Cc: Brad Hards <bhards@bigpond.net.au>
Acked-by: Felipe Balbi <balbi@ti.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Thomas Dahlmann <dahlmann.thomas@arcor.de>
Cc: David Brownell <david-b@pacbell.net>
Cc: David Lopo <dlopo@chipidea.mips.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Michal Nazarewicz <m.nazarewicz@samsung.com>
Cc: Xie Xiaobo <X.Xie@freescale.com>
Cc: Li Yang <leoli@freescale.com>
Cc: Jiang Bo <tanya.jiang@freescale.com>
Cc: Yuan-hsin Chen <yhchen@faraday-tech.com>
Cc: Darius Augulis <augulis.darius@gmail.com>
Cc: Xiaochen Shen <xiaochen.shen@intel.com>
Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Cc: OKI SEMICONDUCTOR, <toshiharu-linux@dsn.okisemi.com>
Cc: Robert Jarzmik <robert.jarzmik@free.fr>
Cc: Ben Dooks <ben@simtec.co.uk>
Cc: Thomas Abraham <thomas.ab@samsung.com>
Cc: Herbert Pötzl <herbert@13thfloor.at>
Cc: Arnaud Patard <arnaud.patard@rtp-net.org>
Cc: Roman Weissgaerber <weissg@vienna.at>
Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: Tony Olech <tony.olech@elandigitalsystems.com>
Cc: Florian Floe Echtler <echtler@fs.tum.de>
Cc: Christian Lucht <lucht@codemercs.com>
Cc: Juergen Stuber <starblue@sourceforge.net>
Cc: Georges Toth <g.toth@e-biz.lu>
Cc: Bill Ryder <bryder@sgi.com>
Cc: Kuba Ober <kuba@mareimbrium.org>
Cc: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
In drivers/usb/core/hub.c::usb_disconnect(), 'udev' will never be
NULL, so remove the test and printing of debug message.
Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch (as1482) adds a macro for testing whether or not a
pm_message value represents an autosuspend or autoresume (i.e., a
runtime PM) event. Encapsulating this notion seems preferable to
open-coding the test all over the place.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
usb_ifnum_to_if() can return NULL if the USB device does not have a
configuration installed (usb_device->actconfig == NULL), or if we can't
find the interface number in the installed configuration. Return an
error instead of crashing.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
wMaxPacketSize is __le16 and should be accessed as such. Also fix the
wBytesPerInterval assignment while here.
v2: also fix the wBytesPerInterval assigment, noticed by Matt Evans
This patch should be backported to the 3.0 kernel.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Acked-by: Matt Evans <matt@ozlabs.org>
Cc: stable@kernel.org
* 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (115 commits)
EHCI: fix direction handling for interrupt data toggles
USB: serial: add IDs for WinChipHead USB->RS232 adapter
USB: OHCI: fix another regression for NVIDIA controllers
usb: gadget: m66592-udc: add pullup function
usb: gadget: m66592-udc: add function for external controller
usb: gadget: r8a66597-udc: add pullup function
usb: renesas_usbhs: support multi driver
usb: renesas_usbhs: inaccessible pipe is not an error
usb: renesas_usbhs: care buff alignment when dma handler
USB: PL2303: correctly handle baudrates above 115200
usb: r8a66597-hcd: fixup USB_PORT_STAT_C_SUSPEND shift
usb: renesas_usbhs: compile/config are rescued
usb: renesas_usbhs: fixup comment-out
usb: update email address in ohci-sh and r8a66597-hcd
usb: r8a66597-hcd: add function for external controller
EHCI: only power off port if over-current is active
USB: mon: Allow to use usbmon without debugfs
USB: EHCI: go back to using the system clock for QH unlinks
ehci: add pci quirk for Ordissimo and RM Slate 100 too
ehci: refactor pci quirk to use standard dmi_check_system method
...
Fix up trivial conflicts in Documentation/feature-removal-schedule.txt
Commit e534c5b831 (USB: fix regression
occurring during device removal) didn't go far enough. It failed to
take into account that when a driver claims multiple interfaces, it may
release them all at the same time. As a result, some interfaces can
get released before they are unregistered, and we deadlock trying to
acquire the bandwidth_mutex that we already own.
This patch (asl478) handles this case by setting the "unregistering"
flag on all the interfaces before removing any of them.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Cc: stable <stable@kernel.org>
Tested-by: Éric Piel <eric.piel@tremplin-utc.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch (as1476) fixes a regression introduced by
fccf4e8620 (USB: Free bandwidth when
usb_disable_device is called). usb_disconnect() grabs the
bandwidth_mutex before calling usb_disable_device(), which calls down
indirectly to usb_set_interface(), which tries to acquire the
bandwidth_mutex.
The fix causes usb_set_interface() to return early when it is called
for an interface that has already been unregistered, which is what
happens in usb_disable_device().
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* 'usb-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6:
MAINTAINERS: add myself as maintainer of USB/IP
usb: r8a66597-hcd: fix cannot detect low/full speed device
USB: ehci-ath79: fix a NULL pointer dereference
USB: Add new FT232H chip to drivers/usb/serial/ftdi_sio.c
usb/isp1760: Fix bug preventing the unlinking of control urbs
USB: Fix up URB error codes to reflect implementation.
xhci: Always set urb->status to zero for isoc endpoints.
xhci: Add reset on resume quirk for asrock p67 host
xHCI 1.0: Incompatible Device Error
USB: don't let errors prevent system sleep
USB: don't let the hub driver prevent system sleep
USB: change maintainership of ohci-hcd and ehci-hcd
xHCI 1.0: Force Stopped Event(FSE)
xhci: Don't warn about zeroed bMaxBurst descriptor field.
USB: Free bandwidth when usb_disable_device is called.
xhci: Reject double add of active endpoints.
USB: TI 3410/5052 USB Serial Driver: Fix mem leak when firmware is too big.
usb: musb: gadget: clear TXPKTRDY flag when set FLUSHFIFO
usb: musb: host: compare status for negative error values
* 'for-usb-linus' of git+ssh://master.kernel.org/pub/scm/linux/kernel/git/sarah/xhci:
USB: Fix up URB error codes to reflect implementation.
xhci: Always set urb->status to zero for isoc endpoints.
xhci: Add reset on resume quirk for asrock p67 host
xHCI 1.0: Incompatible Device Error
xHCI 1.0: Force Stopped Event(FSE)
xhci: Don't warn about zeroed bMaxBurst descriptor field.
USB: Free bandwidth when usb_disable_device is called.
xhci: Reject double add of active endpoints.
This patch (as1473) renames the "in_suspend" field in struct
dev_pm_info to "is_prepared", in preparation for an upcoming change.
The new name is more descriptive of what the field really means.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: stable@kernel.org
This patch (as1464) implements the recommended policy that most errors
during suspend or hibernation should not prevent the system from going
to sleep. In particular, failure to suspend a USB driver or a USB
device should not prevent the sleep from succeeding:
Failure to suspend a device won't matter, because the device will
automatically go into suspend mode when the USB bus stops carrying
packets. (This might be less true for USB-3.0 devices, but let's not
worry about them now.)
Failure of a driver to suspend might lead to trouble later on when the
system wakes up, but it isn't sufficient reason to prevent the system
from going to sleep.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch (as1465) continues implementation of the policy that errors
during suspend or hibernation should not prevent the system from going
to sleep.
In this case, failure to turn on the Suspend feature for a hub port
shouldn't be reported as an error. There are situations where this
does actually occur (such as when the device plugged into that port
was disconnected in the recent past), and it turns out to be harmless.
There's no reason for it to prevent a system sleep.
Also, don't allow the hub driver to fail a system suspend if the
downstream ports aren't all suspended. This is also harmless (and
should never happen, given the change mentioned above); printing a
warning message in the kernel log is all we really need to do.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Tanya ran into an issue when trying to switch a UAS device from the BOT
configuration to the UAS configuration via the bConfigurationValue sysfs
file. Before installing the UAS configuration, set_bConfigurationValue()
calls usb_disable_device(). That function is supposed to remove all host
controller resources associated with that device, but it leaves some state
in the xHCI host controller.
Commit 0791971ba8
usb: allow drivers to use allocated bandwidth until unbound
added a call to usb_disable_device() in usb_set_configuration(), before
the xHCI bandwidth functions were invoked. That commit fixed a bug, but
also introduced a bug that is triggered when a configured device is
switched to a new configuration.
usb_disable_device() goes through all the motions of unbinding the drivers
attached to active interfaces and removing the USB core structures
associated with those interfaces, but it doesn't actually remove the
endpoints from the internal xHCI host controller bandwidth structures.
When usb_disable_device() calls usb_disable_endpoint() with reset_hardware
set to true, the entries in udev->ep_out and udev->ep_in will be set to
NULL. Usually, when the USB core installs a new configuration,
usb_hcd_alloc_bandwidth() will drop all non-NULL endpoints in udev->ep_out
and udev->ep_in before adding any new endpoints. However, when the new
UAS configuration was added, all those entries were null, so none of the
old endpoints in the BOT configuration were dropped.
The xHCI driver blindly added the UAS configuration endpoints, and some of
the endpoint addresses overlapped with the old BOT configuration
endpoints. This caused the xHCI host to reject the Configure Endpoint
command. Now that the xHCI driver code is cleaned up to reject a
double-add of active endpoints, we need to fix the USB core to properly
drop old endpoints in usb_disable_device().
If the host controller driver needs bandwidth checking support, make
usb_disable_device() call usb_disable_endpoint() with
reset_hardware set to false, drop the endpoints from the xHCI host
controller, and then call usb_disable_endpoint() again with
reset_hardware set to true.
The first call to usb_disable_endpoint() will cancel any pending URBs and
wait on them to be freed in usb_hcd_disable_endpoint(), but will keep the
pointers in udev->ep_out and udev->ep in intact. Then
usb_hcd_alloc_bandwidth() will use those pointers to know which endpoints
to drop.
The final call to usb_disable_endpoint() will do two things:
1. It will call usb_hcd_disable_endpoint() again, which should be harmless
since the ep->urb_list should be empty after the first call to
usb_disable_endpoint() returns.
2. It will set the entries in udev->ep_out and udev->ep in to NULL, and call
usb_hcd_disable_endpoint(). That call will have no effect, since the xHCI
driver doesn't set the endpoint_disable function pointer.
Note that usb_disable_device() will now need to be called with
hcd->bandwidth_mutex held.
This should be backported to kernels as old as 2.6.32.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Reported-by: Tanya Brokhman <tlinder@codeaurora.org>
Cc: ablay@codeaurora.org
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: stable@kernel.org
The "authorized_default" module parameter of usbcore controls the default
for the authorized_default variable of each USB host controller.
-1 is authorized for all devices except wireless (default, old behaviour)
0 is unauthorized for all devices
1 is authorized for all devices
Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Commit 64252c75a (vfs: remove dget() from dentry_unhash()) removed the
useless dget from dentry_unhash but didn't fix up this caller in the usb
code. There used to be exactly one dput per dentry_unhash call; now
there are none.
Tested-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Sage Weil <sage@newdream.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Protocol stall should not be fatal while reading port or hub status as it is
transient state. Currently hub EP0 STALL during port status read results in
failed device enumeration. This has been observed with ST-Ericsson (formerly
Philips) USB 2.0 Hub (04cc:1521) after connecting keyboard.
Signed-off-by: Libor Pechacek <lpechacek@suse.cz>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch (as1467) removes the last usages of hcd->state from
usbcore. We no longer check to see if an interrupt handler finds that
a controller has died; instead we rely on host controller drivers to
make an explicit call to usb_hc_died().
This fixes a regression introduced by commit
9b37596a2e (USB: move usbcore away from
hcd->state). It used to be that when a controller shared an IRQ with
another device and an interrupt arrived while hcd->state was set to
HC_STATE_HALT, the interrupt handler would be skipped. The commit
removed that test; as a result the current code doesn't skip calling
the handler and ends up believing the controller has died, even though
it's only temporarily stopped. The solution is to ignore HC_STATE_HALT
following the handler's return.
As a consequence of this change, several of the host controller
drivers need to be modified. They can no longer implicitly rely on
usbcore realizing that a controller has died because of hcd->state.
The patch adds calls to usb_hc_died() in the appropriate places.
The patch also changes a few of the interrupt handlers. They don't
expect to be called when hcd->state is equal to HC_STATE_HALT, even if
the controller is still alive. Early returns were added to avoid any
confusion.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Manuel Lauss <manuel.lauss@googlemail.com>
CC: Rodolfo Giometti <giometti@linux.it>
CC: Olav Kongas <ok@artecdesign.ee>
CC: <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Some USB3.0 devices go to SS.Inactive state when hot plug to USB3 ports.
Warm reset the port to transition it to U0 state.
This patch fixes the issue that Kingston USB3.0 flash drive can not be
recognized when hot plug to USB3 port.
Signed-off-by: Andiry Xu <andiry.xu@amd.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
In the past, we use USB2.0 request to suspend and resume a USB3.0 device.
Actually, USB3.0 hub does not support Set/Clear PORT_SUSPEND request,
instead, it uses Set PORT_LINK_STATE request. This patch makes USB3.0 device
suspend/resume comply with USB3.0 specification.
This patch fixes the issue that USB3.0 device can not be suspended when
connected to a USB3.0 external hub.
Signed-off-by: Andiry Xu <andiry.xu@amd.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
USB3.0 specification has different wPortStatus and wPortChange definitions
from USB2.0 specification. Since USB3 root hub and USB2 root hub are split
now and USB3 hub only has USB3 protocol ports, we should modify the
portstatus and portchange report of USB3 ports to comply with USB3.0
specification.
Signed-off-by: Andiry Xu <andiry.xu@amd.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
while going through Tatyana's changes for the gadget framework I noticed
that this type is not defined as __le16.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
The usb_create_sysfs_intf_files() function always returned zero even
if it failed to create sysfs fails. Since this is a desired behaviour
there is no need to return return code at all. This commit changes
function's return type (form int) to void.
Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
