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(parent: 67ddbb3) | patch
HID: Only dump input if someone is listening
authorHenrik Rydberg <rydberg@euromail.se>
Sat, 1 Sep 2012 19:47:11 +0000 (21:47 +0200)
committerJiri Kosina <jkosina@suse.cz>
Sun, 2 Sep 2012 07:26:46 +0000 (09:26 +0200)
commit9bfc8da00b1e74f55a52cc06a0d364f1f7f61ed8
tree6643c6edd934129b20a58a2fe1361a461a02f237tree | snapshot
parent67ddbb3e6568fb1820b2cc45b00c50702b114801commit | diff
HID: Only dump input if someone is listening

Going through the motions of printing the debug message information
takes a long time; using the keyboard can lead to a 160 us irqsoff
latency. This patch skips hid_dump_input() when there are no open
handles, which brings latency down to 100 us.

Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
drivers/hid/hid-core.c diff | blob | blame | history
Linux 6.x block layer and io_uring tree(s)