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authorDmitry Torokhov <dmitry.torokhov@gmail.com>2017-06-07 08:59:34 +0200
committerJiri Kosina <jkosina@suse.cz>2017-06-08 13:56:09 +0200
commitaaac082dac0a8ac6b00509c7ae2fa8280f966652 (patch)
treea7b5f120070f8d399d784f1b5601a09c50822291 /ipc
parentHID: usbhid: do not rely on hid->open when deciding to do IO (diff)
downloadlinux-aaac082dac0a8ac6b00509c7ae2fa8280f966652.tar.xz
linux-aaac082dac0a8ac6b00509c7ae2fa8280f966652.zip
HID: serialize hid_hw_open and hid_hw_close
The HID transport drivers either re-implement exactly the same logic (usbhid, i2c-hid) or forget to implement it (usbhid) which causes issues when the same device is accessed via multiple interfaces (for example input device through evdev and also hidraw). Let's muve the locking logic into HID core to make sure the serialized behavior is always enforced. Also let's uninline and move hid_hw_start() and hid_hw_stop() into hid-core as hid_hw_start() is somewhat large and do not believe we get any benefit from these two being inline. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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