Peter Hurley e3f5ff371c serial: 8250_dw: Fix deadlock in LCR workaround ... commit 7fd6f640f2 upstream. Trying to write console output from within the serial console driver while the port->lock is held causes recursive deadlock: CPU 0 spin_lock_irqsave(&port->lock) printk() console_unlock() call_console_drivers() serial8250_console_write() spin_lock_irqsave(&port->lock) ** DEADLOCK ** The 8250_dw i/o accessors try to write a console error message if the LCR workaround was unsuccessful. When the port->lock is already held (eg., when called from serial8250_set_termios()), this deadlocks. Make the error message a FIXME until a general solution is devised. Cc: Tim Kryger <tim.kryger@gmail.com> Reported-by: Zhang Zhen <zhenzhang.zhang@huawei.com> Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2015-04-29 10:33:57 +02:00
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hvc	drivers/tty/hvc: don't free hvc_console_setup after init	2014-05-13 13:59:40 +02:00
ipwireless
serial	serial: 8250_dw: Fix deadlock in LCR workaround	2015-04-29 10:33:57 +02:00
vt	vt: provide notifications on selection changes	2015-03-06 14:40:51 -08:00
amiserial.c
bfin_jtag_comm.c
cyclades.c
ehv_bytechan.c
goldfish.c
isicom.c
Kconfig
Makefile
metag_da.c
moxa.c
moxa.h
mxser.c
mxser.h
n_gsm.c	tty: n_gsm: Fix for modems with brk in modem status control	2014-02-22 12:41:27 -08:00
n_hdlc.c
n_r3964.c
n_tracerouter.c
n_tracesink.c
n_tracesink.h
n_tty.c	n_tty: Fix n_tty_write crash when echoing in raw mode	2014-05-13 13:59:40 +02:00
nozomi.c
pty.c	tty: Prevent untrappable signals from malicious program	2015-03-06 14:40:51 -08:00
rocket.c
rocket.h
rocket_int.h
synclink.c
synclink_gt.c
synclinkmp.c
sysrq.c
tty_audit.c
tty_buffer.c
tty_io.c	tty: fix up atime/mtime mess, take four	2015-03-18 13:22:33 +01:00
tty_ioctl.c	TTY: fix tty_wait_until_sent on 64-bit machines	2015-03-18 13:22:31 +01:00
tty_ldisc.c
tty_mutex.c
tty_port.c