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evdev: Use console lock as evdev lock for all supported keyboard drivers.

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Now evdev part of keyboard drivers does not take any locks if corresponding
input/eventN device node is not opened by userland consumers.

Do not assert console lock inside evdev to handle the cases when keyboard
driver is called from some special single-threaded context like shutdown
thread.
This commit is contained in:
Vladimir Kondratyev 2018-10-27 20:22:41 +00:00
parent b5532964e7
commit f86e7267f5
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=339823
4 changed files with 9 additions and 4 deletions
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2
sys/dev/atkbdc/atkbd.c
View File

@ -484,7 +484,7 @@ atkbd_init(int unit, keyboard_t **kbdp, void *arg, int flags)
evdev_support_led(evdev, LED_CAPSL);
evdev_support_led(evdev, LED_SCROLLL);
if (evdev_register(evdev))
if (evdev_register_mtx(evdev, &Giant))
evdev_free(evdev);
else
state->ks_evdev = evdev;

7
sys/dev/evdev/evdev_private.h
View File

@ -132,9 +132,14 @@ struct evdev_dev
LIST_HEAD(, evdev_client) ev_clients;
};
#define SYSTEM_CONSOLE_LOCK &Giant
#define EVDEV_LOCK(evdev) mtx_lock((evdev)->ev_lock)
#define EVDEV_UNLOCK(evdev) mtx_unlock((evdev)->ev_lock)
#define EVDEV_LOCK_ASSERT(evdev) mtx_assert((evdev)->ev_lock, MA_OWNED)
#define EVDEV_LOCK_ASSERT(evdev) do { \
if ((evdev)->ev_lock != SYSTEM_CONSOLE_LOCK) \
mtx_assert((evdev)->ev_lock, MA_OWNED); \
} while (0)
#define EVDEV_ENTER(evdev) do { \
if ((evdev)->ev_lock_type == EV_LOCK_INTERNAL) \
EVDEV_LOCK(evdev); \

2
sys/dev/kbdmux/kbdmux.c
View File

@ -505,7 +505,7 @@ kbdmux_init(int unit, keyboard_t **kbdp, void *arg, int flags)
evdev_support_led(evdev, LED_CAPSL);
evdev_support_led(evdev, LED_SCROLLL);
if (evdev_register(evdev))
if (evdev_register_mtx(evdev, &Giant))
evdev_free(evdev);
else
state->ks_evdev = evdev;

2
sys/dev/usb/input/ukbd.c
View File

@ -1361,7 +1361,7 @@ ukbd_attach(device_t dev)
if (sc->sc_flags & UKBD_FLAG_SCROLLLOCK)
evdev_support_led(evdev, LED_SCROLLL);
if (evdev_register(evdev))
if (evdev_register_mtx(evdev, &Giant))
evdev_free(evdev);
else
sc->sc_evdev = evdev;