android_kernel_xiaomi_sm8350/drivers/usb
Alan Stern d1aa3e6aa8 USB: fix race in autosuspend reschedule
This patch (as1002) fixes a small race which can occur when a driver
expects usbcore to reschedule an autosuspend request.  If the request
arrives too late, it won't be rescheduled.  The patch adds an extra
argument to autosuspend_check(), indicating that a reschedule is
needed no matter how much time has elapsed.

It also tries to avoid letting asynchronous changes to the value of
jiffies cause a delay to become negative, by caching a local copy of
the current time.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-10-12 14:55:35 -07:00
..
atm USB: cxacru: Use appropriate logging for errors 2007-10-12 14:55:28 -07:00
class usblp: Fix a double kfree 2007-10-12 14:55:15 -07:00
core USB: fix race in autosuspend reschedule 2007-10-12 14:55:35 -07:00
gadget atmel_usba_udc: Keep track of the device status 2007-10-12 14:55:35 -07:00
host USB: mutual exclusion for EHCI init and port resets 2007-10-12 14:55:34 -07:00
image
misc USB: drivers/usb/misc/sisusbvga/sisusb.c: kill two unused variables 2007-10-12 14:55:30 -07:00
mon USB: reorganize urb->status use in usbmon 2007-10-12 14:55:23 -07:00
serial USB: serial core should respect driver requirements 2007-10-12 14:55:34 -07:00
storage USB: Nikon D40X unusual_devs entry 2007-10-12 14:55:34 -07:00
Kconfig usb: Enable hcd support on SH unconditionally. 2007-08-22 14:27:45 -07:00
Makefile USB: always visit drivers/usb/misc/ 2007-10-12 14:55:26 -07:00
README
usb-skeleton.c USB: usb-skeleton leaking locks on open 2007-10-12 14:55:26 -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.