531ff40301
Some input drivers need to implement an internal hotplugging scheme for dependent devices to provide multiple X devices off one kernel device file. Such dependent devices can be added with NewInputDeviceRequest() but they are not removed when the config backend calls DeleteInputDeviceRequest(), leaving the original device to clean up. Example of the wacom driver: config/udev calls NewInputDeviceRequest("stylus") wacom PreInit calls NewInputDeviceRequest("eraser") NewInputDeviceRequest("pad") NewInputDeviceRequest("cursor") PreInit finishes. When the device is removed, the config backend only calls DeleteInputDeviceRequest for "stylus". The driver needs to call DeleteInputDeviceRequest for the dependent devices eraser, pad and cursor to clean up properly. However, when the server terminates, DeleteInputDeviceRequest is called for all devices - the driver must not remove the dependent devices to avoid double-frees. There is no method for the driver to detect why a device is being removed, leading to elaborate guesswork and some amount of wishful thinking. Though the input driver's UnInit already supports flags, they are unused. This patch uses the flags to supply information where the DeleteInputDeviceRequest request originates from, allowing a driver to selectively call DeleteInputDeviceRequest when necessary. Also bumps XINPUT ABI. Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> Reviewed-by: Dan Nicholson <dbn.lists@gmail.com> Signed-off-by: Keith Packard <keithp@keithp.com> |
||
---|---|---|
composite | ||
config | ||
damageext | ||
dbe | ||
dix | ||
doc | ||
exa | ||
fb | ||
glx | ||
hw | ||
include | ||
m4 | ||
mi | ||
miext | ||
os | ||
randr | ||
record | ||
render | ||
test | ||
Xext | ||
xfixes | ||
Xi | ||
xkb | ||
.gitignore | ||
autogen.sh | ||
configure.ac | ||
COPYING | ||
cpprules.in | ||
Makefile.am | ||
README | ||
xorg-server.m4 | ||
xorg-server.pc.in |
X Server The X server accepts requests from client applications to create windows, which are (normally rectangular) "virtual screens" that the client program can draw into. Windows are then composed on the actual screen by the X server (or by a separate composite manager) as directed by the window manager, which usually communicates with the user via graphical controls such as buttons and draggable titlebars and borders. For a comprehensive overview of X Server and X Window System, consult the following article: http://en.wikipedia.org/wiki/X_server All questions regarding this software should be directed at the Xorg mailing list: http://lists.freedesktop.org/mailman/listinfo/xorg Please submit bug reports to the Xorg bugzilla: https://bugs.freedesktop.org/enter_bug.cgi?product=xorg The master development code repository can be found at: git://anongit.freedesktop.org/git/xorg/xserver http://cgit.freedesktop.org/xorg/xserver For patch submission instructions, see: http://www.x.org/wiki/Development/Documentation/SubmittingPatches For more information on the git code manager, see: http://wiki.x.org/wiki/GitPage