linux/drivers/usb
Julia Lawall a45a1e07aa USB: serial: Eliminate useless code
The variables priv and portdata are initialized twice to the same (side
effect-free) expressions.  Drop one initialization in each case.

A simplified version of the semantic match that finds this problem is:
(http://coccinelle.lip6.fr/)

// <smpl>
@forall@
idexpression *x;
identifier f!=ERR_PTR;
@@

x = f(...)
... when != x
(
x = f(...,<+...x...+>,...)
|
* x = f(...)
)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-03-02 14:54:34 -08:00
..
atm USB: atm: Use FIELD_SIZEOF, trivial cleanup. 2010-03-02 14:54:22 -08:00
c67x00 USB: c67x00: use resource_size(). 2010-03-02 14:54:01 -08:00
class USB: BKL removal: cdc-wdm 2010-03-02 14:54:27 -08:00
core USB: BKL removal from ioctl path of usbfs 2010-03-02 14:54:32 -08:00
early USB: fix section mismatch in early ehci dbgp 2009-12-23 11:34:11 -08:00
gadget USB: gadget: Add DEVTYPE support for Ethernet functions 2010-03-02 14:54:33 -08:00
host USB host: make Open Firmware device id constant 2010-03-02 14:54:18 -08:00
image USB: BKL removal: mdc800 2010-03-02 14:54:27 -08:00
misc USB: remove the berry_charge driver 2010-03-02 14:54:33 -08:00
mon usbmon: add bus number to text API 2010-03-02 14:53:30 -08:00
musb USB: musb: don't dereference NULL tusb_dma in dma_controller_destroy() 2010-03-02 14:54:14 -08:00
otg usb: otg: twl4030: move to request_threaded_irq 2010-03-02 14:53:40 -08:00
serial USB: serial: Eliminate useless code 2010-03-02 14:54:34 -08:00
storage USB: unusual_devs: Add support for multiple Option 3G sticks 2010-03-02 14:54:03 -08:00
wusbcore USB class: make USB device id constant 2010-03-02 14:54:15 -08:00
Kconfig USB: host: SL811: allow the hcd on Blackfin systems 2010-03-02 14:53:27 -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: BKL removal: usb-skeleton 2010-03-02 14:54:26 -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.