Geert Uytterhoeven 62570d2476 serial: sh-sci: Fix race condition causing garbage during shutdown ... [ Upstream commit 1cf4a7efdc ] If DMA is enabled and used, a burst of old data may be seen on the serial console during "poweroff" or "reboot". uart_flush_buffer() clears the circular buffer, but sci_port.tx_dma_len is not reset. This leads to a circular buffer overflow, dumping (UART_XMIT_SIZE - sci_port.tx_dma_len) bytes. To fix this, add a .flush_buffer() callback that resets sci_port.tx_dma_len. Inspired by commit 31ca2c63fd ("tty/serial: atmel: fix race condition (TX+DMA)"). Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-04-13 19:50:07 +02:00
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hvc	tty: hvc_xen: hide xen_console_remove when unused	2018-02-25 11:03:46 +01:00
ipwireless	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2015-04-14 09:50:27 -07:00
serial	serial: sh-sci: Fix race condition causing garbage during shutdown	2018-04-13 19:50:07 +02:00
vt	vt: change SGR 21 to follow the standards	2018-04-08 11:52:01 +02:00
amiserial.c	tty: amiserial.c: move assignment out of if () block	2015-05-10 19:04:16 +02:00
bfin_jtag_comm.c	TTY: bfin_jtag_comm: remove incorrect wait_until_sent operation	2015-03-07 03:44:14 +01:00
cyclades.c	tty: Remove ASYNC_CLOSING checks in open()/hangup() methods	2015-10-17 21:11:29 -07:00
ehv_bytechan.c	tty: remove unused variable sprop	2015-02-03 15:52:13 -08:00
goldfish.c	Revert "tty: goldfish: Fix a parameter of a call to free_irq"	2017-10-21 17:09:06 +02:00
isicom.c	tty/isicom: fix big-endian compile warning	2015-02-02 10:11:25 -08:00
Kconfig	tty: cyclades: cyz_interrupt is only used for PCI	2018-02-25 11:03:48 +01:00
Makefile	TTY: Add MIPS EJTAG Fast Debug Channel TTY driver	2015-03-31 12:04:12 +02:00
metag_da.c	tty/metag_da: Avoid module_init/module_exit in non-modular code	2015-06-16 14:12:31 -04:00
mips_ejtag_fdc.c	ttyFDC: Fix build problems due to use of module_{init,exit}	2015-10-17 21:29:21 -07:00
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	tty: n_hdlc: get rid of racy n_hdlc.tbuf	2017-03-15 09:57:10 +08:00
n_r3964.c	tty: r3964: Replace/remove bogus tty lock use	2015-10-17 21:11:29 -07:00
n_tracerouter.c	n_tracerouter: stop including <asm-generic/bug>	2015-10-15 00:21:10 +02:00
n_tracesink.c	n_tracesink: stop including <asm-generic/bug>	2015-10-15 00:21:11 +02:00
n_tracesink.h
n_tty.c	n_tty: fix EXTPROC vs ICANON interaction with TIOCINQ (aka FIONREAD)	2018-01-02 20:33:28 +01:00
nozomi.c	tty: nozomi: avoid a harmless gcc warning	2017-04-30 05:49:27 +02:00
pty.c	tty: pty: Fix ldisc flush after userspace become aware of the data already	2017-05-20 14:27:02 +02:00
rocket_int.h
rocket.c	tty: Remove tty_port::close_wait	2015-10-17 21:11:29 -07:00
rocket.h	tty: rocket: fix comment of ROCKET_SPD_HI	2015-05-24 12:49:16 -07:00
synclink_gt.c	tty: Remove ASYNC_CLOSING checks in open()/hangup() methods	2015-10-17 21:11:29 -07:00
synclink.c	tty: synclink, fix indentation	2015-10-17 21:14:06 -07:00
synclinkmp.c	tty: Remove ASYNC_CLOSING checks in open()/hangup() methods	2015-10-17 21:11:29 -07:00
sysrq.c	sysrq: Fix warning in sysrq generated crash.	2018-01-17 09:35:28 +01:00
tty_audit.c	tty: audit: Fix audit source	2015-11-20 16:19:54 -08:00
tty_buffer.c	tty: fix __tty_insert_flip_char regression	2017-09-27 11:00:13 +02:00
tty_io.c	pty: cancel pty slave port buf's work in tty_release	2018-03-24 10:58:48 +01:00
tty_ioctl.c	tty: Fix tty_send_xchar() lock order inversion	2015-11-20 16:19:54 -08:00
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: tty_ldsem.c: move assignment out of if () block	2015-05-10 19:04:18 +02:00
tty_mutex.c	tty: Drop krefs for interrupted tty lock	2017-06-14 13:16:26 +02:00
tty_port.c	tty: Abstract tty buffer work	2015-10-17 21:32:21 -07:00