Josh Cartwright d78006d234 sc16is7xx: Drop bogus use of IRQF_ONESHOT ... commit 04da73803c05dc1150ccc31cbf93e8cd56679c09 upstream. The use of IRQF_ONESHOT when registering an interrupt handler with request_irq() is non-sensical. Not only that, it also prevents the handler from being threaded when it otherwise should be w/ IRQ_FORCED_THREADING is enabled. This causes the following deadlock observed by Sean Nyekjaer on -rt: Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM [..] rt_spin_lock_slowlock from queue_kthread_work queue_kthread_work from sc16is7xx_irq sc16is7xx_irq [sc16is7xx] from handle_irq_event_percpu handle_irq_event_percpu from handle_irq_event handle_irq_event from handle_level_irq handle_level_irq from generic_handle_irq generic_handle_irq from mxc_gpio_irq_handler mxc_gpio_irq_handler from mx3_gpio_irq_handler mx3_gpio_irq_handler from generic_handle_irq generic_handle_irq from __handle_domain_irq __handle_domain_irq from gic_handle_irq gic_handle_irq from __irq_svc __irq_svc from rt_spin_unlock rt_spin_unlock from kthread_worker_fn kthread_worker_fn from kthread kthread from ret_from_fork Fixes: 9e6f4ca3e5 ("sc16is7xx: use kthread_worker for tx_work and irq") Reported-by: Sean Nyekjaer <sean.nyekjaer@prevas.dk> Signed-off-by: Josh Cartwright <joshc@ni.com> Cc: linux-rt-users@vger.kernel.org Cc: Jakub Kicinski <moorray3@wp.pl> Cc: linux-serial@vger.kernel.org Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Julia Cartwright <julia@ni.com> Acked-by: Jakub Kicinski <kubakici@wp.pl> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2017-01-09 08:07:49 +01:00
..
hvc
ipwireless
serial	sc16is7xx: Drop bogus use of IRQF_ONESHOT	2017-01-09 08:07:49 +01:00
vt	vt: fix Scroll Lock LED trigger name	2017-01-09 08:07:47 +01:00
amiserial.c
bfin_jtag_comm.c
cyclades.c
ehv_bytechan.c
goldfish.c
isicom.c
Kconfig
Makefile
metag_da.c
mips_ejtag_fdc.c
moxa.c
moxa.h
mxser.c
mxser.h
n_gsm.c	TTY: n_gsm, fix false positive WARN_ON	2016-06-01 12:15:52 -07:00
n_hdlc.c	Fix OpenSSH pty regression on close	2016-06-01 12:15:52 -07:00
n_r3964.c
n_tracerouter.c
n_tracesink.c
n_tracesink.h
n_tty.c	Fix OpenSSH pty regression on close	2016-06-01 12:15:52 -07:00
nozomi.c
pty.c	devpts: clean up interface to pty drivers	2016-08-16 09:30:49 +02:00
rocket_int.h
rocket.c
rocket.h
synclink_gt.c
synclink.c
synclinkmp.c
sysrq.c
tty_audit.c
tty_buffer.c	Fix OpenSSH pty regression on close	2016-06-01 12:15:52 -07:00
tty_io.c
tty_ioctl.c
tty_ldisc.c	tty: Prevent ldisc drivers from re-using stale tty fields	2016-11-21 10:06:40 +01:00
tty_ldsem.c
tty_mutex.c
tty_port.c