korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-12-23 02:54:32 +08:00
Code Issues Packages Projects Releases Wiki Activity
2e9fe53910
linux/drivers/tty/serial/8250
History
Vignesh R 2e9fe53910 serial: 8250: Don't service RX FIFO if interrupts are disabled 
Currently, data in RX FIFO is read based on UART_LSR register state even
if RDI and RLSI interrupts are disabled in UART_IER register.
This is because when IRQ handler is called due to TX FIFO empty event,
RX FIFO is serviced based on UART_LSR register status instead of
UART_IIR status. This defeats the purpose of disabling UART RX
FIFO interrupts during throttling(see, omap_8250_throttle()) as IRQ
handler continues to drain UART RX FIFO resulting in overflow of buffer
at tty layer.
Fix this by making sure that driver drains UART RX FIFO only when
UART_IIR_RDI is set along with UART_LSR_BI or UART_LSR_DR bits.

Signed-off-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-02-28 13:40:22 +01:00
..
8250_accent.c tty: serial: Remove redundant license text 2017-11-08 13:08:12 +01:00
8250_acorn.c tty: serial: Remove redundant license text 2017-11-08 13:08:12 +01:00
8250_aspeed_vuart.c tty: serial: Remove redundant license text 2017-11-08 13:08:12 +01:00
8250_bcm2835aux.c tty: serial: Remove redundant license text 2017-11-08 13:08:12 +01:00
8250_boca.c tty: serial: Remove redundant license text 2017-11-08 13:08:12 +01:00
8250_core.c treewide: Remove TIMER_FUNC_TYPE and TIMER_DATA_TYPE casts 2017-11-21 16:35:54 -08:00
8250_dma.c tty: serial: Remove redundant license text 2017-11-08 13:08:12 +01:00
8250_dw.c serial: 8250_dw: Revert "Improve clock rate setting" 2018-01-22 14:13:40 +01:00
8250_early.c serial: 8250_early: Only set divisor if valid clk & baud 2017-11-28 15:55:15 +01:00
8250_em.c tty: serial: Remove redundant license text 2017-11-08 13:08:12 +01:00
8250_exar_st16c554.c tty: serial: Remove redundant license text 2017-11-08 13:08:12 +01:00
8250_exar.c tty: serial: exar: Relocate sleep wake-up handling 2018-01-25 12:44:50 +01:00
8250_fintek.c serial: 8250_fintek: Fix crash with baud rate B0 2017-11-08 13:09:35 +01:00
8250_fourport.c tty: serial: Remove redundant license text 2017-11-08 13:08:12 +01:00
8250_fsl.c tty: serial: Remove redundant license text 2017-11-08 13:08:12 +01:00
8250_gsc.c tty: serial: Remove redundant license text 2017-11-08 13:08:12 +01:00
8250_hp300.c tty: add SPDX identifiers to all remaining files in drivers/tty/ 2017-11-08 13:08:12 +01:00
8250_hub6.c tty: serial: Remove redundant license text 2017-11-08 13:08:12 +01:00
8250_ingenic.c serial: 8250_ingenic: Parse earlycon options 2018-01-09 16:49:14 +01:00
8250_lpc18xx.c tty: serial: Remove redundant license text 2017-11-08 13:08:12 +01:00
8250_lpss.c tty: serial: Remove redundant license text 2017-11-08 13:08:12 +01:00
8250_men_mcb.c Introduce 8250_men_mcb 2017-08-28 20:51:22 +02:00
8250_mid.c tty: serial: Remove redundant license text 2017-11-08 13:08:12 +01:00
8250_moxa.c tty: serial: Remove redundant license text 2017-11-08 13:08:12 +01:00
8250_mtk.c tty: serial: Remove redundant license text 2017-11-08 13:08:12 +01:00
8250_of.c serial: 8250_of: fix return code when probe function fails to get reset 2018-01-09 16:46:26 +01:00
8250_omap.c serial: 8250: 8250_omap: Fix spelling error. 2017-12-15 20:27:44 +01:00
8250_pci.c serial: 8250_pci: Add Amazon PCI serial device ID 2017-11-28 15:55:15 +01:00
8250_pnp.c tty: serial: Remove redundant license text 2017-11-08 13:08:12 +01:00
8250_port.c serial: 8250: Don't service RX FIFO if interrupts are disabled 2018-02-28 13:40:22 +01:00
8250_pxa.c tty: serial: Remove redundant license text 2017-11-08 13:08:12 +01:00
8250_uniphier.c serial: 8250_uniphier: fix error return code in uniphier_uart_probe() 2018-01-09 16:45:17 +01:00
8250.h tty: serial: Remove redundant license text 2017-11-08 13:08:12 +01:00
Kconfig serial: forbid 8250 on s390 2017-12-15 20:21:28 +01:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
serial_cs.c tty: add SPDX identifiers to all remaining files in drivers/tty/ 2017-11-08 13:08:12 +01:00