OpenE2K/qemu-e2k
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d6cd66311f
qemu-e2k/hw
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Eric Farman d6cd66311f vfio-ccw: Do not read region ret_code after write 
A pwrite() call returns the number of bytes written (or -1 on error),
and vfio-ccw compares this number with the size of the region to
determine if an error had occurred or not.

If they are not equal, this is a failure and the errno is used to
determine exactly how things failed. An errno of zero is possible
(though unlikely) in this situation and would be translated to a
successful operation.

If they ARE equal, the ret_code field is read from the region to
determine how to proceed. While the kernel sets the ret_code field
as necessary, the region and thus this field is not "written back"
to the user. So the value can only be what it was initialized to,
which is zero.

So, let's convert an unexpected length with errno of zero to a
return code of -EFAULT, and explicitly set an expected length to
a return code of zero. This will be a little safer and clearer.

Suggested-by: Matthew Rosato <mjrosato@linux.ibm.com>
Signed-off-by: Eric Farman <farman@linux.ibm.com>
Message-Id: <20210303160739.2179378-1-farman@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2021-03-04 11:24:49 +01:00
..
9pfs 9pfs: Convert reclaim list to QSLIST 2021-01-22 18:26:40 +01:00
acpi acpi/core: always set SCI_EN when SMM isn't supported 2021-02-23 10:58:42 -05:00
adc hw/adc: Add an ADC module for NPCM7XX 2021-01-12 21:19:02 +00:00
alpha vl: extract softmmu/datadir.c 2020-12-10 12:15:18 -05:00
arm hw/arm: Add I2C sensors and EEPROM for GSJ machine 2021-02-16 13:50:38 +00:00
audio audio/via-ac97: Simplify code and set user_creatable to false 2021-01-04 23:24:44 +01:00
avr vl: extract softmmu/datadir.c 2020-12-10 12:15:18 -05:00
block hw/block/fdc: Remove the check_media_rate property 2021-02-20 12:36:19 +01:00
char hw/char/exynos4210_uart: Fix missing call to report ready for input 2021-02-02 17:00:54 +00:00
core acpi/core: always set SCI_EN when SMM isn't supported 2021-02-23 10:58:42 -05:00
cpu cpu/core: Register core-id and nr-threads as class properties 2020-09-22 16:48:29 -04:00
cris cris: do not use ram_size global 2020-12-10 12:15:07 -05:00
display display/ui: add a callback to indicate GL state is flushed 2021-02-04 15:58:54 +01:00
dma hw/arm/xlnx-versal: Versal SoC requires ZDMA 2021-02-03 10:15:50 +00:00
gpio hw: gpio: implement gpio-pwr driver for qemu reset/poweroff 2021-01-29 10:47:28 +00:00
hppa hw: Use the PCI_SLOT() macro from 'hw/pci/pci.h' 2021-01-04 23:24:44 +01:00
hyperv qdev: Move softmmu properties to qdev-properties-system.h 2020-12-18 15:20:17 -05:00
i2c hw/i2c: Implement NPCM7XX SMBus Module FIFO Mode 2021-02-16 14:12:54 +00:00
i386 i386/acpi: restore device paths for pre-5.1 vms 2021-03-02 05:40:35 -05:00
ide hw/ide/ahci: map cmd_fis as DMA_DIRECTION_TO_DEVICE 2021-02-15 15:10:14 +01:00
input Remove superfluous timer_del() calls 2021-01-08 15:13:38 +00:00
intc hw/intc/loongson_liointc: Fix per core ISR handling 2021-02-21 18:41:46 +01:00
ipack Use OBJECT_DECLARE_SIMPLE_TYPE when possible 2020-09-18 14:12:32 -04:00
ipmi Remove superfluous timer_del() calls 2021-01-08 15:13:38 +00:00
isa acpi/core: always set SCI_EN when SMM isn't supported 2021-02-23 10:58:42 -05:00
lm32 vl: extract softmmu/datadir.c 2020-12-10 12:15:18 -05:00
m68k m68k: import bootinfo headers from linux 2021-02-11 21:56:42 +01:00
mem nvdimm: put it into the 'storage' category 2021-02-20 12:36:19 +01:00
microblaze vl: make qemu_get_machine_opts static 2020-12-15 12:51:55 -05:00
mips vt82c686: Move creation of ISA devices to the ISA bridge 2021-02-21 19:42:34 +01:00
misc Fix SPDX-License-Identifier typos 2021-02-20 12:36:19 +01:00
moxie moxie: do not use ram_size global 2020-12-10 12:15:08 -05:00
net virtio-net: handle zero mac for a vdpa peer 2021-03-02 06:09:54 -05:00
nios2 * New -action option and set-action QMP command (Alejandro) 2020-12-15 21:24:31 +00:00
nubus meson: convert hw/nubus 2020-08-21 06:30:25 -04:00
nvram nvram: add nrf51_soc flash read method 2021-02-08 15:15:32 +01:00
openrisc target/openrisc: Move pic_cpu code into CPU object proper 2020-12-15 12:04:30 +00:00
pci hw/pci: Have safer pcie_bus_realize() by checking error path 2021-03-02 09:16:18 -05:00
pci-bridge Kconfig: Compile PXB for ARM_VIRT 2021-01-17 06:42:54 -05:00
pci-host acpi/gpex: Fix cca attribute check for pxb device 2021-02-23 10:06:55 -05:00
pcmcia pxa2xx: Move QOM macros to header 2020-08-27 14:04:55 -04:00
ppc hw/ppc: e500: Fill in correct <clock-frequency> for the serial nodes 2021-02-10 14:50:11 +11:00
rdma Machine queue, 2020-12-23 2021-01-01 22:57:15 +00:00
remote multi-process: perform device reset in the remote process 2021-02-10 09:23:28 +00:00
riscv riscv: Pass RISCVHartArrayState by pointer 2021-01-16 14:34:46 -08:00
rtc pl031: Use timer_free() in the finalize function to avoid memleaks 2021-01-18 11:51:26 +01:00
rx rx: move BIOS load from MCU to board 2020-12-10 12:15:06 -05:00
s390x virtio-ccw: commands on revision-less devices 2021-03-04 11:23:35 +01:00
scsi scsi: drop 'result' argument from command_complete callback 2021-02-25 14:14:32 +01:00
sd Pull request trivial patches 20210220 2021-02-21 12:12:18 +00:00
semihosting semihosting: Implement SYS_ISERROR 2021-01-18 10:05:06 +00:00
sh4 hw: Use the PCI_SLOT() macro from 'hw/pci/pci.h' 2021-01-04 23:24:44 +01:00
smbios i386: do not use ram_size global 2020-12-10 12:15:08 -05:00
sparc sun4m: don't connect two qemu_irqs directly to the same input 2021-01-06 11:41:37 +00:00
sparc64 vl: extract softmmu/datadir.c 2020-12-10 12:15:18 -05:00
ssi hw/ssi: imx_spi: Correct tx and rx fifo endianness 2021-02-02 17:00:55 +00:00
timer arm: Update infocenter.arm.com URLs 2021-02-11 11:50:14 +00:00
tpm tpm: put some tpm devices into the correct category 2021-02-20 12:36:19 +01:00
tricore tricore tcg cpus: Fix Lesser GPL version number 2020-11-15 16:40:30 +01:00
unicore32 meson: convert hw/arch* 2020-08-21 06:30:33 -04:00
usb scsi: drop 'result' argument from command_complete callback 2021-02-25 14:14:32 +01:00
vfio vfio-ccw: Do not read region ret_code after write 2021-03-04 11:24:49 +01:00
virtio vhost: simplify vhost_dev_init() fail_busyloop label 2021-03-02 09:16:18 -05:00
watchdog arm: Remove frq properties on CMSDK timer, dualtimer, watchdog, ARMSSE 2021-01-29 15:54:44 +00:00
xen pci: add romsize property 2021-02-05 08:52:58 -05:00
xenpv meson: convert hw/arch* 2020-08-21 06:30:33 -04:00
xtensa vl: make qemu_get_machine_opts static 2020-12-15 12:51:55 -05:00
Kconfig multi-process: Add config option for multi-process QEMU 2021-02-09 20:53:56 +00:00
meson.build multi-process: setup a machine object for remote device process 2021-02-10 09:23:28 +00:00