Peter Hurley ef8b9ddcb4 serial: Fix IGNBRK handling ... If IGNBRK is set without either BRKINT or PARMRK set, some uart drivers send a 0x00 byte for BREAK without the TTYBREAK flag to the line discipline, when it should send either nothing or the TTYBREAK flag set. This happens because the read_status_mask masks out the BI condition, which uart_insert_char() then interprets as a normal 0x00 byte. SUS v3 is clear regarding the meaning of IGNBRK; Section 11.2.2, General Terminal Interface - Input Modes, states: "If IGNBRK is set, a break condition detected on input shall be ignored; that is, not put on the input queue and therefore not read by any process." Fix read_status_mask to include the BI bit if IGNBRK is set; the lsr status retains the BI bit if a BREAK is recv'd, which is subsequently ignored in uart_insert_char() when masked with the ignore_status_mask. Affected drivers: 8250 - all serial_txx9 mfd amba-pl010 amba-pl011 atmel_serial bfin_uart dz ip22zilog max310x mxs-auart netx-serial pnx8xxx_uart pxa sb1250-duart sccnxp serial_ks8695 sirfsoc_uart st-asc vr41xx_siu zs sunzilog fsl_lpuart sunsab ucc_uart bcm63xx_uart sunsu efm32-uart pmac_zilog mpsc msm_serial m32r_sio Unaffected drivers: omap-serial rp2 sa1100 imx icom Annotated for fixes: altera_uart mcf Drivers without break detection: 21285 xilinx-uartps altera_jtaguart apbuart arc-uart clps711x max3100 uartlite msm_serial_hs nwpserial lantiq vt8500_serial Unknown: samsung mpc52xx_uart bfin_sport_uart cpm_uart/core Fixes: Bugzilla #71651, '8250_core.c incorrectly handles IGNBRK flag' Reported-by: Ivan <athlon_@mail.ru> Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2014-06-19 13:04:52 -07:00
..
8250_accent.c
8250_acorn.c	tty: remove use of __devexit	2012-11-21 15:27:46 -08:00
8250_boca.c
8250_core.c	serial: Fix IGNBRK handling	2014-06-19 13:04:52 -07:00
8250_dma.c	serial: 8250_dma: check the result of TX buffer mapping	2014-05-28 13:07:27 -07:00
8250_dw.c	8250_dw: Support all baudrates on baytrail	2014-04-24 16:13:01 -07:00
8250_early.c	tty/serial: add back missing setup_early_serial8250_console	2014-05-03 18:16:38 -04:00
8250_em.c	tty: delete non-required instances of include <linux/init.h>	2014-01-07 17:05:21 -08:00
8250_exar_st16c554.c
8250_fourport.c
8250_fsl.c
8250_gsc.c	parisc: Fix interrupt routing for C8000 serial ports	2013-07-31 23:42:32 +02:00
8250_hp300.c	tty: remove use of __devexit	2012-11-21 15:27:46 -08:00
8250_hub6.c
8250_pci.c	serial: Add support for Advantech PCM-3614I/PCM-3618I serial expansion cards	2014-05-28 12:39:14 -07:00
8250_pnp.c	tty: delete non-required instances of include <linux/init.h>	2014-01-07 17:05:21 -08:00
8250.h	serial: 8250: remove a few lines of dead code	2013-03-25 16:36:48 -07:00
Kconfig	tty/serial: convert 8250 to generic earlycon	2014-04-24 16:32:27 -07:00
Makefile	TTY: 8250, revert module name change	2013-03-25 16:26:23 -07:00
serial_cs.c	tty: delete non-required instances of include <linux/init.h>	2014-01-07 17:05:21 -08:00