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Christoph Hellwig 4246a0b63b block: add a bi_error field to struct bio 
Currently we have two different ways to signal an I/O error on a BIO:

 (1) by clearing the BIO_UPTODATE flag
 (2) by returning a Linux errno value to the bi_end_io callback

The first one has the drawback of only communicating a single possible
error (-EIO), and the second one has the drawback of not beeing persistent
when bios are queued up, and are not passed along from child to parent
bio in the ever more popular chaining scenario.  Having both mechanisms
available has the additional drawback of utterly confusing driver authors
and introducing bugs where various I/O submitters only deal with one of
them, and the others have to add boilerplate code to deal with both kinds
of error returns.

So add a new bi_error field to store an errno value directly in struct
bio and remove the existing mechanisms to clean all this up.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: NeilBrown <neilb@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
 		2015-07-29 08:55:15 -06:00
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accessibility
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acpi Merge branches 'pm-cpuidle', 'pm-cpufreq' and 'acpi-resources' 2015-07-16 23:47:19 +02:00
amba
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android
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ata ata: ahci_platform: Add ACPI _CLS matching 2015-07-07 01:55:21 +02:00
atm
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auxdisplay
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base Fix firmware loader uevent buffer NULL pointer dereference 2015-07-09 11:20:01 -07:00
bcma
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block block: add a bi_error field to struct bio 2015-07-29 08:55:15 -06:00
bluetooth Bluetooth: ath3k: Add support of 04ca:300d AR3012 device 2015-06-18 21:00:06 +03:00
bus ARM: SoC: driver updates for v4.2 2015-06-26 11:54:29 -07:00
cdrom
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char Merge tag 'tpm-fixes-for-4.2-rc2' of https://github.com/PeterHuewe/linux-tpmdd into for-linus 2015-07-15 21:46:59 +10:00
clk A small set of fixes for problems found by smatch in new drivers 2015-07-11 11:08:21 -07:00
clocksource clocksource/imx: Define clocksource for mx27 2015-07-07 10:44:45 +02:00
connector
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cpufreq Merge branches 'pm-cpuidle', 'pm-cpufreq' and 'acpi-resources' 2015-07-16 23:47:19 +02:00
cpuidle suspend-to-idle: Prevent RCU from complaining about tick_freeze() 2015-07-09 22:59:49 +02:00
crypto crypto: nx - Fix reentrancy bugs 2015-07-08 15:14:13 +08:00
dca
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devfreq
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dio
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dma Merge branch 'akpm' (patches from Andrew) 2015-07-01 17:47:51 -07:00
dma-buf
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edac A build fix for octeon_edac from Aaro Koskinen. 2015-07-03 12:10:12 -07:00
eisa
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extcon
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firewire
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firmware Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2015-07-03 15:20:57 -07:00
fmc
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gpio Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-07-01 15:19:35 -07:00
gpu Revert "drm/i915: Use crtc_state->active in primary check_plane func" 2015-07-12 15:00:20 -07:00
hid Merge branches 'for-4.2/i2c-hid', 'for-4.2/lenovo', 'for-4.2/plantronics', 'for-4.2/rmi', 'for-4.2/sensor-hub', 'for-4.2/sjoy', 'for-4.2/sony' and 'for-4.2/wacom' into for-linus 2015-06-22 16:23:43 +02:00
hsi Fix up implicit <module.h> users that will break later. 2015-07-02 10:25:22 -07:00
hv
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hwmon hwmon: (w83627ehf) Use swap() in w82627ehf_swap_tempreg() 2015-07-03 14:39:06 +02:00
hwspinlock hwspinlock: qcom: Correct msb in regmap_field 2015-07-01 16:15:05 +03:00
hwtracing/coresight
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i2c i2c: Mark instantiated device nodes with OF_POPULATE 2015-07-09 22:25:54 +02:00
ide Minor merge needed, due to function move. 2015-07-01 10:49:25 -07:00
idle
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iio
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infiniband IB/core: Destroy ocrdma_dev_id IDR on module exit 2015-07-14 13:20:16 -04:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2015-07-11 11:16:04 -07:00
iommu IOMMU Fixes for Linux v4.2-rc0 2015-07-01 14:44:22 -07:00
ipack
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irqchip Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2015-07-12 13:55:24 -07:00
isdn Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2015-06-24 16:49:49 -07:00
leds Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2015-07-01 19:09:11 -07:00
lguest Merge branch 'x86-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-06-22 17:59:09 -07:00
macintosh
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mailbox Replace module_init with appropriate alternate initcall in non modules. 2015-07-02 10:36:29 -07:00
mcb
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md block: add a bi_error field to struct bio 2015-07-29 08:55:15 -06:00
media Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2015-07-01 19:09:11 -07:00
memory Merge branch 'fixes-rc1' into omap-for-v4.2/fixes 2015-07-06 05:33:17 -07:00
memstick memstick: remove deprecated use of pci api 2015-06-30 19:44:57 -07:00
message
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mfd Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-07-01 15:19:35 -07:00
misc powerpc fixes for 4.2 2015-07-10 12:16:59 -07:00
mmc block: have drivers use blk_queue_max_discard_sectors() 2015-07-17 08:41:53 -06:00
mtd block: have drivers use blk_queue_max_discard_sectors() 2015-07-17 08:41:53 -06:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-07-13 11:18:25 -07:00
nfc Char/Misc driver patches for 4.2-rc1 2015-06-26 14:51:15 -07:00
ntb NTB: Add split BAR output for debugfs stats 2015-07-04 14:09:32 -04:00
nubus
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nvdimm block: add a bi_error field to struct bio 2015-07-29 08:55:15 -06:00
of Devicetree changes for v4.2 2015-07-01 19:40:18 -07:00
oprofile
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parisc
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parport
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pci Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-07-01 15:19:35 -07:00
pcmcia Fix up implicit <module.h> users that will break later. 2015-07-02 10:25:22 -07:00
phy Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2015-06-27 12:44:34 -07:00
pinctrl Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-07-01 15:19:35 -07:00
platform intel_scu_ipc: move local memory initialization out of a mutex 2015-07-14 11:02:44 -07:00
pnp ACPI / PNP: Reserve ACPI resources at the fs_initcall_sync stage 2015-07-06 23:52:21 +02:00
power Replace module_platform_driver with builtin_platform driver in non modules. 2015-07-02 10:42:13 -07:00
powercap
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pps
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ps3
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ptp
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pwm pwm: Changes for v4.2-rc1 2015-06-23 13:32:38 -07:00
rapidio Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2015-06-23 14:08:54 -07:00
ras
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regulator Fix up implicit <module.h> users that will break later. 2015-07-02 10:25:22 -07:00
remoteproc remoteproc: fix !CONFIG_OF build breakage 2015-06-18 11:44:41 +03:00
reset
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rpmsg
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rtc Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2015-06-27 12:44:34 -07:00
s390 block: add a bi_error field to struct bio 2015-07-29 08:55:15 -06:00
sbus
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scsi block: have drivers use blk_queue_max_discard_sectors() 2015-07-17 08:41:53 -06:00
sfi
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sh Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-07-01 15:19:35 -07:00
sn
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soc ARM: SoC: late fixes and dependencies 2015-07-02 14:40:49 -07:00
spi Merge remote-tracking branches 'spi/topic/sirf', 'spi/topic/spidev' and 'spi/topic/zynq' into spi-next 2015-06-18 00:19:56 +01:00
spmi
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ssb
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staging Staging driver patches for 4.2-rc1 2015-06-26 15:46:08 -07:00
target block: add a bi_error field to struct bio 2015-07-29 08:55:15 -06:00
tc
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thermal Minor merge needed, due to function move. 2015-07-01 10:49:25 -07:00
thunderbolt
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tty ARM: SoC: late fixes and dependencies 2015-07-02 14:40:49 -07:00
uio
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usb Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2015-07-04 19:36:06 -07:00
uwb
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vfio VFIO updates for v4.2 2015-06-28 12:32:13 -07:00
vhost Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2015-07-04 14:13:43 -07:00
video stifb: Implement hardware accelerated copyarea 2015-07-10 21:44:19 +02:00
virt
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virtio virtio/vhost: cross endian support 2015-07-03 16:02:25 -07:00
vlynq
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vme
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w1
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watchdog Merge git://www.linux-watchdog.org/linux-watchdog 2015-07-01 19:33:16 -07:00
xen Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2015-07-04 14:13:43 -07:00
zorro
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Kconfig libnvdimm, nfit: initial libnvdimm infrastructure and NFIT support 2015-06-24 21:24:10 -04:00
Makefile The libnvdimm sub-system introduces, in addition to the libnvdimm-core, 2015-06-29 10:34:42 -07:00