Tomas Melin b86f86e8e7 serial: 8250: fix potential deadlock in rs485-mode ... Canceling hrtimer when holding uart spinlock can deadlock. CPU0: syscall write -> get uart port spinlock -> write uart -> start_tx_rs485 -> hrtimer_cancel -> wait for hrtimer callback to finish CPU1: hrtimer IRQ -> run hrtimer -> em485_handle_stop_tx -> get uart port spinlock CPU0 is waiting for the hrtimer callback to finish, but the hrtimer callback running on CPU1 is waiting to get the uart port spinlock. This deadlock can be avoided by not canceling the hrtimers in these paths. Setting active_timer=NULL can be done without accessing hrtimer, and that will effectively cancel operations that would otherwise have been performed by the hrtimer callback. Signed-off-by: Tomas Melin <tomas.melin@vaisala.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2017-11-04 12:38:04 +01:00
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8250_accent.c	tty: serial: 8250: Add generic port init macro	2016-02-06 23:15:53 -08:00
8250_acorn.c	tty: serial: 8250: Fix whitespace errors	2016-02-06 23:15:53 -08:00
8250_aspeed_vuart.c	drivers/serial: Do not leave sysfs group in case of error in aspeed_vuart_probe()	2017-07-30 07:37:25 -07:00
8250_bcm2835aux.c	serial: 8250: Add CAP_MINI, set for bcm2835aux	2017-05-24 15:15:56 +02:00
8250_boca.c	tty: serial: 8250: Add generic port init macro	2016-02-06 23:15:53 -08:00
8250_core.c	serial: 8250: Convert timers to use timer_setup()	2017-11-04 12:01:53 +01:00
8250_dma.c	serial: 8250_dma: power off device after TX is done	2016-11-16 10:57:26 +01:00
8250_dw.c	serial: 8250_dw: Improve clock rate setting	2017-10-04 10:17:27 +02:00
8250_early.c	serial: 8250_early: Remove __init marking from early write	2017-07-30 07:38:50 -07:00
8250_em.c	serial: 8250: remove the redundant include	2015-03-26 22:21:08 +01:00
8250_exar_st16c554.c	tty: serial: 8250: Add generic port init macro	2016-02-06 23:15:53 -08:00
8250_exar.c	Merge 4.13-rc5 into tty-next	2017-08-14 14:46:59 -07:00
8250_fintek.c	serial: 8250_fintek: Fix rs485 disablement on invalid ioctl()	2017-11-04 12:08:53 +01:00
8250_fourport.c	tty: serial: 8250: Add generic port init macro	2016-02-06 23:15:53 -08:00
8250_fsl.c	serial: export fsl8250_handle_irq	2015-11-20 16:19:54 -08:00
8250_gsc.c	tty: 8250: constify parisc_device_id	2017-08-28 20:51:20 +02:00
8250_hp300.c	serial: hp300: mask the warning for people just doing build coverage	2017-01-25 11:08:30 +01:00
8250_hub6.c	tty: serial: 8250: Fix whitespace errors	2016-02-06 23:15:53 -08:00
8250_ingenic.c	serial: 8250_ingenic: Remove __init marking from early write	2017-07-30 07:38:50 -07:00
8250_lpc18xx.c	serial: 8250: add LPC18xx/43xx UART driver	2015-06-01 06:56:33 +09:00
8250_lpss.c	serial: 8250_lpss: Unconditionally set PCI master for Quark	2017-03-31 15:36:54 +02:00
8250_men_mcb.c	Introduce 8250_men_mcb	2017-08-28 20:51:22 +02:00
8250_mid.c	serial: 8250_mid: Enable HSU on Intel Cedar Fork PCH	2017-10-04 10:17:27 +02:00
8250_moxa.c	serial: 8250: moxa: Store num_ports in brd	2017-01-12 11:51:25 +01:00
8250_mtk.c	serial: Add define for max baud rate divisor	2017-10-04 10:17:27 +02:00
8250_of.c	serial: 8250: of: Add new port type for MediaTek BTIF controller on MT7622/23 SoC	2017-08-28 20:51:22 +02:00
8250_omap.c	serial: Add define for max baud rate divisor	2017-10-04 10:17:27 +02:00
8250_pci.c	serial: 8250_mid: Enable HSU on Intel Cedar Fork PCH	2017-10-04 10:17:27 +02:00
8250_pnp.c	tty: serial: 8250: Fix indentation warnings	2016-02-06 23:15:53 -08:00
8250_port.c	serial: 8250: fix potential deadlock in rs485-mode	2017-11-04 12:38:04 +01:00
8250_pxa.c	serial: pxa2xx: mark PM functions as __maybe_unused	2016-11-10 14:50:46 +01:00
8250_uniphier.c	serial: 8250_uniphier: add suspend/resume support	2017-08-28 20:51:22 +02:00
8250.h	serial: 8250: Add CAP_MINI, set for bcm2835aux	2017-05-24 15:15:56 +02:00
Kconfig	Introduce 8250_men_mcb	2017-08-28 20:51:22 +02:00
Makefile	Introduce 8250_men_mcb	2017-08-28 20:51:22 +02:00
serial_cs.c	tty: serial: 8250: Fix multi-line strings	2016-02-06 23:15:53 -08:00