linux-stable.git/drivers/usb/core, branch v3.4.87

usb: hub: Clear Port Reset Change during init/resume

2014-04-14T13:44:29+00:00

commit e92aee330837e4911553761490a8fb843f2053a6 upstream.

This patch adds the Port Reset Change flag to the set of bits that are
preemptively cleared on init/resume of a hub. In theory this bit should
never be set unexpectedly... in practice it can still happen if BIOS,
SMM or ACPI code plays around with USB devices without cleaning up
correctly. This is especially dangerous for XHCI root hubs, which don't
generate any more Port Status Change Events until all change bits are
cleared, so this is a good precaution to have (similar to how it's
already done for the Warm Port Reset Change flag).

Signed-off-by: Julius Werner 
Acked-by: Alan Stern 
Signed-off-by: Greg Kroah-Hartman 
[bwh: Backported to 3.2:
 - Adjust context
 - s/usb_clear_port_feature/clear_port_feature/]
Signed-off-by: Ben Hutchings 
[yangyl: Backported to 3.4: Adjust context]
Signed-off-by: Yang Yingliang 
Signed-off-by: Greg Kroah-Hartman

usb: Disable USB 2.0 Link PM before device reset.

2014-04-14T13:44:27+00:00

commit dcc01c0864823f91c3bf3ffca6613e2351702b87 upstream.

Before the USB core resets a device, we need to disable the L1 timeout
for the roothub, if USB 2.0 Link PM is enabled.  Otherwise the port may
transition into L1 in between descriptor fetches, before we know if the
USB device descriptors changed.  LPM will be re-enabled after the
full device descriptors are fetched, and we can confirm the device still
supports USB 2.0 LPM after the reset.

We don't need to wait for the USB device to exit L1 before resetting the
device, since the xHCI roothub port diagrams show a transition to the
Reset state from any of the Ux states (see Figure 34 in the 2012-08-14
xHCI specification update).

This patch should be backported to kernels as old as 3.2, that contain
the commit 65580b4321eb36f16ae8b5987bfa1bb948fc5112 "xHCI: set USB2
hardware LPM".  That was the first commit to enable USB 2.0
hardware-driven Link Power Management.

Signed-off-by: Sarah Sharp 
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings 
Cc: Yang Yingliang 
Signed-off-by: Greg Kroah-Hartman

usb: Add USB_QUIRK_RESET_RESUME for all Logitech UVC webcams

2014-04-14T13:44:22+00:00

commit e387ef5c47ddeaeaa3cbdc54424cdb7a28dae2c0 upstream.

Most Logitech UVC webcams (both early models that don't advertise UVC
compatibility and newer UVC-advertised devices) require the RESET_RESUME
quirk. Instead of listing each and every model, match the devices based
on the UVC interface information.

Signed-off-by: Laurent Pinchart 
Acked-by: Alan Stern 
[bwh: Adjust context to apply after 3.2.38]
Signed-off-by: Ben Hutchings 
Cc: Yang Yingliang 
Signed-off-by: Greg Kroah-Hartman

usb: Add quirk detection based on interface information

2014-04-14T13:44:22+00:00

commit 80da2e0df5af700518611b7d1cc4fc9945bcaf95 upstream.

When a whole class of devices (possibly from a specific vendor, or
across multiple vendors) require a quirk, explictly listing all devices
in the class make the quirks table unnecessarily large. Fix this by
allowing matching devices based on interface information.

Signed-off-by: Laurent Pinchart 
Acked-by: Alan Stern 
Signed-off-by: Ben Hutchings 
Cc: Yang Yingliang 
Signed-off-by: Greg Kroah-Hartman

USB: Add device quirk for Microsoft VX700 webcam

2014-04-14T13:44:22+00:00

commit bc009eca8d539162f7271c2daf0ab5e9e3bb90a0 upstream.

Add device quirk for Microsoft Lifecam VX700 v2.0 webcams.
Fixes squeaking noise of the microphone.

Signed-off-by: Andreas Fleig 
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings 
Cc: Yang Yingliang 
Signed-off-by: Greg Kroah-Hartman

usb: core: get config and string descriptors for unauthorized devices

2014-02-06T19:05:48+00:00

commit 83e83ecb79a8225e79bc8e54e9aff3e0e27658a2 upstream.

There is no need to skip querying the config and string descriptors for
unauthorized WUSB devices when usb_new_device is called.  It is allowed
by WUSB spec.  The only action that needs to be delayed until
authorization time is the set config.  This change allows user mode
tools to see the config and string descriptors earlier in enumeration
which is needed for some WUSB devices to function properly on Android
systems.  It also reduces the amount of divergent code paths needed
for WUSB devices.

Signed-off-by: Thomas Pugliese 
Signed-off-by: Greg Kroah-Hartman

usb: hub: Use correct reset for wedged USB3 devices that are NOTATTACHED

2013-12-20T15:34:19+00:00

commit 2d51f3cd11f414c56a87dc018196b85fd50b04a4 upstream.

This patch adds a check for USB_STATE_NOTATTACHED to the
hub_port_warm_reset_required() workaround for ports that end up in
Compliance Mode in hub_events() when trying to decide which reset
function to use. Trying to call usb_reset_device() with a NOTATTACHED
device will just fail and leave the port broken.

Signed-off-by: Julius Werner 
Acked-by: Alan Stern 
Signed-off-by: Greg Kroah-Hartman

usb: fix cleanup after failure in hub_configure()

2013-11-20T18:43:19+00:00

commit d0308d4b6b02597f39fc31a9bddf7bb3faad5622 upstream.

If the hub_configure() fails after setting the hdev->maxchild
the hub->ports might be NULL or point to uninitialized kzallocated
memory causing NULL pointer dereference in hub_quiesce() during cleanup.

Now after such error the hdev->maxchild is set to 0 to avoid cleanup
of uninitialized ports.

Signed-off-by: Krzysztof Mazur 
Acked-by: Alan Stern 
Signed-off-by: Greg Kroah-Hartman

USB: quirks: add touchscreen that is dazzeled by remote wakeup

2013-11-13T03:01:47+00:00

commit 614ced91fc6fbb5a1cdd12f0f1b6c9197d9f1350 upstream.

The device descriptors are messed up after remote wakeup

Signed-off-by: Oliver Neukum 
Signed-off-by: Greg Kroah-Hartman

USB: quirks.c: add one device that cannot deal with suspension

2013-11-13T03:01:47+00:00

commit 4294bca7b423d1a5aa24307e3d112a04075e3763 upstream.

The device is not responsive when resumed, unless it is reset.

Signed-off-by: Oliver Neukum 
Signed-off-by: Greg Kroah-Hartman