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Luben Tuikov 07194ab7be USB: Reset USB 3.0 devices on (re)discovery ... If the device isn't reset, the XHCI HCD sends SET ADDRESS to address 0 while the device is already in Addressed state, and the request is dropped on the floor as it is addressed to the default address. This sequence of events, which this patch fixes looks like this: usb_reset_and_verify_device() hub_port_init() hub_set_address() SET_ADDRESS to 0 with 1 usb_get_device_descriptor(udev, 8) usb_get_device_descriptor(udev, 18) descriptors_changed() --> goto re_enumerate: hub_port_logical_disconnect() kick_khubd() And then: hub_events() hub_port_connect_change() usb_disconnect() usb_disable_device() new device struct sets device state to Powered choose_address() hub_port_init() <-- no reset, but SET ADDRESS to 0 with 1, timeout! The solution is to always reset the device in hub_port_init() to put it in a known state. Note from Sarah Sharp: This patch should be queued for stable trees all the way back to 2.6.34, since that was the first kernel that supported configured device reset. The code this patch touches has been there since 2.6.32, but the bug would never be hit before 2.6.34 because the xHCI driver would completely reject an attempt to reset a configured device under xHCI. Signed-off-by: Luben Tuikov <ltuikov@yahoo.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable@kernel.org		14 years ago
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Kconfig	kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT	14 years ago
Makefile	usb: makefile cleanup	15 years ago
buffer.c	…
config.c	…
devices.c	BKL: remove extraneous #include <smp_lock.h>	14 years ago
devio.c	BKL: remove extraneous #include <smp_lock.h>	14 years ago
driver.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6	14 years ago
endpoint.c	usb: set ep_dev async suspend should be later than device_initialize	14 years ago
file.c	BKL: remove extraneous #include <smp_lock.h>	14 years ago
generic.c	…
hcd-pci.c	xHCI: synchronize irq in xhci_suspend()	14 years ago
hcd.c	USB: fix race between root-hub resume and wakeup requests	14 years ago
hub.c	USB: Reset USB 3.0 devices on (re)discovery	14 years ago
inode.c	fs: dcache remove dcache_lock	14 years ago
message.c	USB: make usb_mark_last_busy use pm_runtime_mark_last_busy	14 years ago
notify.c	…
otg_whitelist.h	…
quirks.c	USB: Add quirk for Samsung Android phone modem	14 years ago
sysfs.c	USB: use the runtime-PM autosuspend implementation	14 years ago
urb.c	USB: output an error message when the pipe type doesn't match the endpoint type	15 years ago
usb.c	USB: use the runtime-PM autosuspend implementation	14 years ago
usb.h	USB: use the runtime-PM autosuspend implementation	14 years ago