linux-stable/drivers/tty
Oliver Barta 012611e87f Revert "serial: 8250: Don't service RX FIFO if interrupts are disabled"
commit 3f2640ed7b upstream.

This reverts commit 2e9fe53910.

Reading LSR unconditionally but processing the error flags only if
UART_IIR_RDI bit was set before in IIR may lead to a loss of transmission
error information on UARTs where the transmission error flags are cleared
by a read of LSR. Information are lost in case an error is detected right
before the read of LSR while processing e.g. an UART_IIR_THRI interrupt.

Signed-off-by: Oliver Barta <o.barta89@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Fixes: 2e9fe53910 ("serial: 8250: Don't service RX FIFO if interrupts are disabled")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-07-21 09:06:00 +02:00
..
hvc hvc_opal: don't set tb_ticks_per_usec in udbg_init_opal_common() 2018-08-03 07:55:14 +02:00
ipwireless tty: ipwireless: fix missing checks for ioremap 2019-05-31 06:48:30 -07:00
serial Revert "serial: 8250: Don't service RX FIFO if interrupts are disabled" 2019-07-21 09:06:00 +02:00
vt tty/vt: fix write/write race in ioctl(KDSKBSENT) handler 2019-05-21 18:48:59 +02:00
amiserial.c
bfin_jtag_comm.c
cyclades.c
ehv_bytechan.c
goldfish.c
isicom.c
Kconfig tty: ldisc: add sysctl to prevent autoloading of ldiscs 2019-04-17 08:36:44 +02:00
Makefile
metag_da.c
mips_ejtag_fdc.c
moxa.c
moxa.h
mxser.c
mxser.h
n_gsm.c tty: n_gsm: Fix DLCI handling for ADM mode if debug & 2 is not set 2018-05-01 15:13:06 -07:00
n_hdlc.c tty/n_hdlc: fix __might_sleep warning 2019-01-31 08:12:35 +01:00
n_r3964.c
n_tracerouter.c
n_tracesink.c
n_tracesink.h
n_tty.c tty: wipe buffer if not echoing data 2018-12-01 09:44:25 +01:00
nozomi.c
pty.c tty: Fix data race in tty_insert_flip_string_fixed_flag 2018-08-03 07:55:22 +02:00
rocket.c tty: rocket: fix incorrect forward declaration of 'rp_init()' 2019-07-10 09:55:46 +02:00
rocket.h
rocket_int.h
synclink.c
synclink_gt.c
synclinkmp.c
sysrq.c
tty_audit.c
tty_buffer.c tty: increase the default flip buffer limit to 2*640K 2019-04-05 22:29:13 +02:00
tty_io.c tty: ldisc: add sysctl to prevent autoloading of ldiscs 2019-04-17 08:36:44 +02:00
tty_ioctl.c termios, tty/tty_baudrate.c: fix buffer overrun 2018-11-21 09:26:00 +01:00
tty_ldisc.c tty: ldisc: add sysctl to prevent autoloading of ldiscs 2019-04-17 08:36:44 +02:00
tty_ldsem.c tty/ldsem: Wake up readers after timed out down_write() 2019-01-23 08:10:52 +01:00
tty_mutex.c
tty_port.c tty: do not set TTY_IO_ERROR flag if console port 2018-12-13 09:20:30 +01:00