WSL2-Linux-Kernel/drivers/usb
Michal Nazarewicz b894f60a23 USB: gadget: f_mass_storage: stale common->fsg value bug fix
On fsg_unbind the common->fsg pointer was not NULLed if the
unbound fsg_dev instance was the current one.  As an effect,
the incorrect pointer was preserved in all further operations
which caused do_set_interface to reference an invalid region.

This commit fixes this by raising an exception in fsg_bind
which will change the common->fsg pointer.  This also requires
an wait queue so that the thread in fsg_bind can wait till the
worker thread handles the exception.

This commit removes also a config and new_config fields of
fsg_common as they are no longer needed since fsg can be
used to determine whether function is active or not.

Moreover, this commit removes possible race condition where
the fsg field was modified in both the worker thread and
form various other contexts.  This is fixed by replacing
prev_fsg with new_fsg.  At this point, fsg is assigned only
in worker thread.

Signed-off-by: Michal Nazarewicz <m.nazarewicz@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-06-30 08:16:07 -07:00
..
atm usb: atm: speedtch: use new hex_to_bin() method 2010-05-25 08:07:05 -07:00
c67x00 USB: make hcd.h public (drivers dependency) 2010-05-20 13:21:30 -07:00
class USB: cdc-acm: fix resource reclaim in error path of acm_probe 2010-06-04 13:16:19 -07:00
core USB: obey the sysfs power/wakeup setting 2010-06-30 08:16:06 -07:00
early echi-dbgp: Add kernel debugger support for the usb debug port 2010-05-20 21:04:31 -05:00
gadget USB: gadget: f_mass_storage: stale common->fsg value bug fix 2010-06-30 08:16:07 -07:00
host USB: isp1362-hcd, fix double lock 2010-06-30 08:16:06 -07:00
image USB: BKL removal: mdc800 2010-03-02 14:54:27 -08:00
misc usb: sisusb_con.c: fix shadows sparse warning 2010-05-20 13:21:41 -07:00
mon Merge branch 'bkl/ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing 2010-05-24 08:01:10 -07:00
musb USB: musb: Enable the maximum supported burst mode for DMA 2010-06-30 08:16:07 -07:00
otg USB: otg/ulpi: bail out on read errors 2010-06-30 08:16:06 -07:00
serial USB: qcserial: fix a memory leak in qcprobe error path 2010-06-30 08:16:06 -07:00
storage usb-storage: always print quirks 2010-05-20 13:21:49 -07:00
wusbcore Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6 2010-05-20 21:26:12 -07:00
Kconfig Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6 2010-03-03 08:48:58 -08:00
Makefile USB: MXC: Add i.MX21 specific USB host controller driver. 2010-03-02 14:52:55 -08:00
README USB: fix directory references in usb/README 2007-11-28 13:58:34 -08:00
usb-skeleton.c USB: rename usb_buffer_alloc() and usb_buffer_free() users 2010-05-20 13:21:38 -07:00

README

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.