kernel_optimize_test/drivers/usb
Pete Zaitcev 10e485221e USB: usblp: "Big cleanup" breaks O_NONBLOCK
I found the first regresson in the rewritten ("all dynamic" and "no races")
driver. If application uses O_NONBLOCK, I return -EAGAIN despite the URB
being submitted successfuly. This causes the application to resubmit the
same data erroneously.

The fix is to pretend that the transfer has succeeded even if URB was
merely queued. It is the same behaviour as with the old version.

Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-07-19 17:46:03 -07:00
..
atm Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
class USB: usblp: "Big cleanup" breaks O_NONBLOCK 2007-07-19 17:46:03 -07:00
core dev_vdbg(), available with -DVERBOSE_DEBUG 2007-07-18 15:49:50 -07:00
gadget USB: use mutex instead of semaphore in the USB gadget serial driver 2007-07-19 17:46:03 -07:00
host USB: use mutex instead of semaphore in the ELAN U132 adapter driver 2007-07-19 17:46:03 -07:00
image header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
misc USB: use mutex instead of semaphore in the FTDI ELAN driver 2007-07-19 17:46:03 -07:00
mon usbmon: Add class for binary interface 2007-07-12 16:29:47 -07:00
serial USB: sierra: Add new devices 2007-07-19 17:46:03 -07:00
storage USB: sierra: Add TRU-Install (c) Support 2007-07-19 17:46:03 -07:00
Kconfig no USB on M32R 2007-07-17 11:01:07 -07:00
Makefile USB: remove Makefile reference to obsolete OHCI_AT91 2007-07-12 16:34:41 -07:00
README
usb-skeleton.c USB: usb-skeleton: use anchors in pre/post reset 2007-07-12 16:34:37 -07:00

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.