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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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59b015133c
sysfs_remove_group() waits for sysfs attributes to be removed, therefore
we do not need to worry about driver-specific attributes being accessed
after driver has been detached from the device. In fact, attempts to take
serio->drv_mutex in attribute methods may lead to the following deadlock:
sysfs_read_file()
fill_read_buffer()
sysfs_get_active_two()
psmouse_attr_show_helper()
serio_pin_driver()
serio_disconnect_driver()
mutex_lock(&serio->drv_mutex);
<--------> mutex_lock(&serio_drv_mutex);
psmouse_disconnect()
sysfs_remove_group(... psmouse_attr_group);
....
sysfs_deactivate();
wait_for_completion();
Fix this by removing calls to serio_[un]pin_driver() and functions themselves
and using driver-private mutexes to serialize access to attribute's set()
methods that may change device state.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
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|---|---|---|
| .. | ||
| alps.c | ||
| alps.h | ||
| amimouse.c | ||
| appletouch.c | ||
| atarimouse.c | ||
| bcm5974.c | ||
| elantech.c | ||
| elantech.h | ||
| gpio_mouse.c | ||
| hgpk.c | ||
| hgpk.h | ||
| inport.c | ||
| Kconfig | ||
| lifebook.c | ||
| lifebook.h | ||
| logibm.c | ||
| logips2pp.c | ||
| logips2pp.h | ||
| Makefile | ||
| maplemouse.c | ||
| pc110pad.c | ||
| psmouse-base.c | ||
| psmouse.h | ||
| pxa930_trkball.c | ||
| rpcmouse.c | ||
| sentelic.c | ||
| sentelic.h | ||
| sermouse.c | ||
| synaptics_i2c.c | ||
| synaptics.c | ||
| synaptics.h | ||
| touchkit_ps2.c | ||
| touchkit_ps2.h | ||
| trackpoint.c | ||
| trackpoint.h | ||
| vsxxxaa.c | ||