Sergio Lopez 019288bf13 hw/char/serial: Only retry if qemu_chr_fe_write returns 0 ...

Only retry on serial_xmit if qemu_chr_fe_write returns 0, as this is the
only recoverable error.

Retrying with any other scenario, in addition to being a waste of CPU
cycles, can compromise the Guest stability if by the vCPU issuing the
write and the main loop thread are, by chance or explicit pinning,
running on the same pCPU.

Previous discussion:

https://lists.nongnu.org/archive/html/qemu-devel/2018-05/msg06998.html

Signed-off-by: Sergio Lopez <slp@redhat.com>
Message-Id: <1528185295-14199-1-git-send-email-slp@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

2018-06-28 19:05:30 +02:00

..

bcm2835_aux.c

…

cadence_uart.c

maint: Fix macros with broken 'do/while(0); ' usage

2018-01-16 14:54:52 +01:00

cmsdk-apb-uart.c

hw/char/cmsdk-apb-uart.c: Accept more input after character read

2018-05-04 18:05:50 +01:00

debugcon.c

…

digic-uart.c

hw/digic: Add trailing '\n' to qemu_log() calls

2018-06-08 13:15:33 +01:00

escc.c

hw/char: remove legacy interface escc_init()

2018-02-16 12:14:26 +11:00

etraxfs_ser.c

…

exynos4210_uart.c

hw/char/exynos4210_uart.c: Remove unneeded handling of NULL chardev

2018-04-26 13:57:00 +01:00

grlib_apbuart.c

…

imx_serial.c

i.MX: Support serial RS-232 break properly

2018-03-23 18:26:45 +00:00

ipoctal232.c

…

lm32_juart.c

…

lm32_uart.c

…

Makefile.objs

hw: make virtio devices configurable via default-configs/

2018-06-01 15:14:31 +02:00

mcf_uart.c

hw: Do not include "exec/address-spaces.h" if it is not necessary

2018-06-01 14:15:10 +02:00

milkymist-uart.c

…

omap_uart.c

…

parallel-isa.c

hw/isa: Move parallel_hds_isa_init() to hw/char/parallel-isa.c

2018-03-12 16:12:47 +01:00

parallel.c

hw/char/parallel: Convert away from old_mmio

2018-06-15 15:23:34 +01:00

pl011.c

…

sclpconsole-lm.c

s390x/sclp: clean up sclp masks

2018-03-08 15:49:23 +01:00

sclpconsole.c

s390x/sclp: clean up sclp masks

2018-03-08 15:49:23 +01:00

serial-isa.c

serial-isa: Use MAX_ISA_SERIAL_PORTS instead of MAX_SERIAL_PORTS

2018-04-26 13:57:00 +01:00

serial-pci.c

…

serial.c

hw/char/serial: Only retry if qemu_chr_fe_write returns 0

2018-06-28 19:05:30 +02:00

sh_serial.c

hw: Do not include "exec/address-spaces.h" if it is not necessary

2018-06-01 14:15:10 +02:00

spapr_vty.c

…

stm32f2xx_usart.c

hw/char/stm32f2xx_usart: fix TXE/TC bit handling

2018-02-22 15:12:51 +00:00

terminal3270.c

chardev: introduce qemu_chr_timeout_add_ms()

2018-01-12 13:22:02 +01:00

trace-events

…

virtio-console.c

Include less of the generated modular QAPI headers

2018-03-02 13:45:50 -06:00

virtio-serial-bus.c

virtio-serial: fix heap-over-flow

2018-04-09 17:35:46 +03:00

xen_console.c

xen: remove other open-coded use of libxengnttab

2018-05-22 11:43:21 -07:00

xilinx_uartlite.c

…