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Input: evdev - properly handle read/write with count 0
authorDmitry Torokhov <dmitry.torokhov@gmail.com>
Wed, 2 May 2012 07:13:37 +0000 (00:13 -0700)
committerDmitry Torokhov <dmitry.torokhov@gmail.com>
Wed, 2 May 2012 07:23:58 +0000 (00:23 -0700)
commit2872a9b521ac936c7a8525a8c2bdfb9b4ccf5cfc
tree613f1456fe437419bbc014f84d7d3c2e73568743tree | snapshot (tar.gz zip)
parentdba4258068f822b7dafc78c28fe9c99c551eca7ecommit | diff
Input: evdev - properly handle read/write with count 0

According to the standard count 0 is special - no IO should happen but we
can check error conditions (device gone away, etc), and return 0 if there
are no errors. We used to return -EINVAL instead and we also could return 0
if an event was "stolen" by another thread.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
drivers/input/evdev.c diff | blob | blame | history