linux/drivers/usb
Sarah Sharp c6cc27c782 xhci: Return canceled URBs immediately when host is halted.
When the xHCI host controller is halted, it won't respond to commands
placed on the command ring.  So if an URB is cancelled after the first
roothub is deallocated, it will try to place a stop endpoint command on
the command ring, which will fail.  The command watchdog timer will fire
after five seconds, and the host controller will be marked as dying, and
all URBs will be completed.

Add a flag to the xHCI's internal state variable for when the host
controller is halted.  Immediately return the canceled URB if the host
controller is halted.

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
2011-03-13 18:23:48 -07:00
..
atm USB: ueagle-atm: use system_wq instead of dedicated workqueues 2011-01-22 19:38:26 -08:00
c67x00 usb: makefile cleanup 2010-10-22 10:22:07 -07:00
class USB: cdc-acm: Adding second ACM channel support for Nokia N8 2011-02-04 12:38:14 -08:00
core USB: Set usb_hcd->state and flags for shared roothubs. 2011-03-13 18:23:33 -07:00
early USB: ehci-dbgp: fix typo in startup message 2011-01-22 19:35:40 -08:00
gadget USB 3.0 Hub Changes 2011-03-13 18:07:11 -07:00
host xhci: Return canceled URBs immediately when host is halted. 2011-03-13 18:23:48 -07:00
image SCSI host lock push-down 2010-11-16 13:33:23 -08:00
misc Merge 2.6.38-rc5 into usb-next 2011-02-17 09:56:55 -08:00
mon USB: usbmon: fix-up docs and text API for sparse ISO 2011-02-04 11:46:57 -08:00
musb USB 3.0 Hub Changes 2011-03-13 18:07:11 -07:00
otg usb: otg: Add ulpi viewport access ops 2011-03-11 14:22:10 -08:00
serial USB: serial: ch341: add new id 2011-03-11 14:21:17 -08:00
storage USB: Remove delay_t unused variable from sierra_ms.c driver initialisation code 2011-03-02 19:52:29 -05:00
wusbcore USB 3.0 Hub Changes 2011-03-13 18:07:11 -07:00
Kconfig Merge branch 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6 2011-01-07 13:16:28 -08:00
Makefile USB: drivers/usb/Makefile: conditionally descend to 'early' 2010-08-10 14:35:38 -07:00
README
usb-skeleton.c llseek: automatically add .llseek fop 2010-10-15 15:53:27 +02:00

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.