linux/drivers/usb
Gavin Guo bb86cf569b usb: Check if port status is equal to RxDetect
When using USB 3.0 pen drive with the [AMD] FCH USB XHCI Controller
[1022:7814], the second hotplugging will experience the USB 3.0 pen
drive is recognized as high-speed device. After bisecting the kernel,
I found the commit number 41e7e056cd
(USB: Allow USB 3.0 ports to be disabled.) causes the bug. After doing
some experiments, the bug can be fixed by avoiding executing the function
hub_usb3_port_disable(). Because the port status with [AMD] FCH USB
XHCI Controlleris [1022:7814] is already in RxDetect
(I tried printing out the port status before setting to Disabled state),
it's reasonable to check the port status before really executing
hub_usb3_port_disable().

Fixes: 41e7e056cd (USB: Allow USB 3.0 ports to be disabled.)
Signed-off-by: Gavin Guo <gavin.guo@canonical.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-17 17:14:01 -07:00
..
atm usb: delete non-required instances of include <linux/init.h> 2014-01-08 15:01:39 -08:00
c67x00 USB: c67x00: correct spelling mistakes in comments 2014-01-08 15:05:14 -08:00
chipidea usb: chipidea: udc: Disable auto ZLP generation on ep0 2014-07-17 16:51:22 -07:00
class USB: usbtmc: fix DMA on stack 2014-05-27 16:03:57 -07:00
common usb: common: rename phy-fsm-usb.c to usb-otg-fsm.c 2014-05-27 15:29:44 -07:00
core usb: Check if port status is equal to RxDetect 2014-07-17 17:14:01 -07:00
dwc2 usb: dwc2: Add function to calculate correct FIFO sizes 2014-05-27 15:42:42 -07:00
dwc3 usb: dwc3: dwc3-omap: Disable/Enable only wrapper interrupts in prepare/complete 2014-06-19 10:06:45 -05:00
early
gadget usb: gadget: gr_udc: Fix check for invalid number of microframes 2014-06-27 10:53:07 -05:00
host usb: Kconfig: make EHCI_MSM selectable for QCOM SOCs 2014-06-30 22:47:18 -07:00
image USB: image: correct spelling mistake in comment 2014-01-08 15:08:14 -08:00
misc USB: usbtest: add a timeout for scatter-gather tests 2014-06-17 17:05:50 -07:00
mon
musb usb: musb: dsps: fix the base address for accessing the mode register 2014-06-30 13:31:48 -05:00
phy usb: phy: msm: Do not do runtime pm if the phy is not idle 2014-06-30 13:23:57 -05:00
renesas_usbhs usb: renesas: gadget: fixup: complete STATUS stage after receiving 2014-06-19 10:06:46 -05:00
serial USB: serial: ftdi_sio: Add Infineon Triboard 2014-07-11 18:22:38 -07:00
storage usb-storage/SCSI: Add broken_fua blacklist flag 2014-06-30 22:47:18 -07:00
wusbcore USB: wusbcore: fix control-pipe directions 2014-05-27 15:04:10 -07:00
Kconfig usb: host: remove USB_ARCH_HAS_?HCI 2014-02-18 12:36:38 -08:00
Makefile usb: move usb/usb-common.c to usb/common/usb-common.c 2014-05-27 15:29:44 -07:00
README
usb-skeleton.c usb: delete non-required instances of include <linux/init.h> 2014-01-08 15:01:39 -08:00

To understand all the Linux-USB framework, you'll use these resources:

    * This source code.  This is necessarily an evolving work, and
      includes kerneldoc that should help you get a current overview.
      ("make pdfdocs", and then look at "usb.pdf" for host side and
      "gadget.pdf" for peripheral side.)  Also, Documentation/usb has
      more information.

    * The USB 2.0 specification (from www.usb.org), with supplements
      such as those for USB OTG and the various device classes.
      The USB specification has a good overview chapter, and USB
      peripherals conform to the widely known "Chapter 9".

    * Chip specifications for USB controllers.  Examples include
      host controllers (on PCs, servers, and more); peripheral
      controllers (in devices with Linux firmware, like printers or
      cell phones); and hard-wired peripherals like Ethernet adapters.

    * Specifications for other protocols implemented by USB peripheral
      functions.  Some are vendor-specific; others are vendor-neutral
      but just standardized outside of the www.usb.org team.

Here is a list of what each subdirectory here is, and what is contained in
them.

core/		- This is for the core USB host code, including the
		  usbfs files and the hub class driver ("khubd").

host/		- This is for USB host controller drivers.  This
		  includes UHCI, OHCI, EHCI, and others that might
		  be used with more specialized "embedded" systems.

gadget/		- This is for USB peripheral controller drivers and
		  the various gadget drivers which talk to them.


Individual USB driver directories.  A new driver should be added to the
first subdirectory in the list below that it fits into.

image/		- This is for still image drivers, like scanners or
		  digital cameras.
../input/	- This is for any driver that uses the input subsystem,
		  like keyboard, mice, touchscreens, tablets, etc.
../media/	- This is for multimedia drivers, like video cameras,
		  radios, and any other drivers that talk to the v4l
		  subsystem.
../net/		- This is for network drivers.
serial/		- This is for USB to serial drivers.
storage/	- This is for USB mass-storage drivers.
class/		- This is for all USB device drivers that do not fit
		  into any of the above categories, and work for a range
		  of USB Class specified devices. 
misc/		- This is for all USB device drivers that do not fit
		  into any of the above categories.