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Tang Junhui 7f4fc93d47 bcache: return attach error when no cache set exist 
I attach a back-end device to a cache set, and the cache set is not
registered yet, this back-end device did not attach successfully, and no
error returned:
[root]# echo 87859280-fec6-4bcc-20df7ca8f86b > /sys/block/sde/bcache/attach
[root]#

In sysfs_attach(), the return value "v" is initialized to "size" in
the beginning, and if no cache set exist in bch_cache_sets, the "v" value
would not change any more, and return to sysfs, sysfs regard it as success
since the "size" is a positive number.

This patch fixes this issue by assigning "v" with "-ENOENT" in the
initialization.

Signed-off-by: Tang Junhui <tang.junhui@zte.com.cn>
Reviewed-by: Michael Lyle <mlyle@lyle.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-02-07 12:50:01 -07:00
..
accessibility
acpi libnvdimm for 4.16 2018-02-06 10:41:33 -08:00
amba
android Char/Misc driver patches for 4.16-rc1 2018-02-01 10:31:17 -08:00
ata pci-v4.16-changes 2018-02-06 09:59:40 -08:00
atm
auxdisplay
base drm/graphics pull request for v4.16-rc1 2018-02-01 17:48:47 -08:00
bcma
block pci-v4.16-changes 2018-02-06 09:59:40 -08:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2018-01-31 14:31:10 -08:00
bus ARM: SoC driver updates for 4.16 2018-02-01 16:35:31 -08:00
cdrom
char pci-v4.16-changes 2018-02-06 09:59:40 -08:00
clk The core framework has a handful of patches this time around, mostly due 2018-02-01 16:56:07 -08:00
clocksource
connector
cpufreq
cpuidle powerpc updates for 4.16 2018-02-02 10:01:04 -08:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2018-01-31 14:22:45 -08:00
dax Merge branch 'for-4.16/dax' into libnvdimm-for-next 2018-02-03 00:26:10 -07:00
dca
devfreq
dio
dma Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2018-02-02 09:50:51 -08:00
dma-buf drm/graphics pull request for v4.16-rc1 2018-02-01 17:48:47 -08:00
edac
eisa
extcon
firewire IEEE 1394 subsystem patches: 2018-02-02 14:57:44 -08:00
firmware pci-v4.16-changes 2018-02-06 09:59:40 -08:00
fmc
fpga
fsi
gpio This is the bulk of pin control changes for the v4.16 kernel cycle: 2018-02-02 14:22:53 -08:00
gpu pci-v4.16-changes 2018-02-06 09:59:40 -08:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2018-01-31 13:00:01 -08:00
hsi HSI changes for the v4.16 series 2018-01-31 12:54:05 -08:00
hv Char/Misc driver patches for 4.16-rc1 2018-02-01 10:31:17 -08:00
hwmon hwmon: (dell-smm) Disable fan support for Dell Vostro 3360 2018-01-27 09:34:22 -08:00
hwspinlock
hwtracing Char/Misc driver patches for 4.16-rc1 2018-02-01 10:31:17 -08:00
i2c Merge branch 'i2c/for-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2018-02-04 10:57:43 -08:00
ide pci-v4.16-changes 2018-02-06 09:59:40 -08:00
idle
iio Staging/IIO patches for 4.16-rc1 2018-02-01 09:51:57 -08:00
infiniband Second pull request for 4.16 merge window 2018-02-06 11:09:45 -08:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2018-02-01 10:49:58 -08:00
iommu pci-v4.16-changes 2018-02-06 09:59:40 -08:00
ipack
irqchip pci-v4.16-changes 2018-02-06 09:59:40 -08:00
isdn Merge branch 'work.sock_recvmsg' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2018-01-30 18:59:03 -08:00
leds LED updates for 4.16-rc1 2018-01-31 12:22:41 -08:00
lightnvm
macintosh pci-v4.16-changes 2018-02-06 09:59:40 -08:00
mailbox Misc driver changes only : 2018-02-04 11:11:23 -08:00
mcb
md bcache: return attach error when no cache set exist 2018-02-07 12:50:01 -07:00
media media updates for v4.16-rc1 2018-02-06 11:27:48 -08:00
memory ARM: SoC driver updates for 4.16 2018-02-01 16:35:31 -08:00
memstick
message
mfd regmap: Updates for v4.16 2018-01-29 11:35:24 -08:00
misc Merge branch 'i2c/for-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2018-02-04 10:57:43 -08:00
mmc MMC host: 2018-02-05 09:51:15 -08:00
mtd dma mapping changes for Linux 4.16: 2018-01-31 11:32:27 -08:00
mux Char/Misc driver patches for 4.16-rc1 2018-02-01 10:31:17 -08:00
net Second pull request for 4.16 merge window 2018-02-06 11:09:45 -08:00
nfc
ntb NTB: ntb_perf: fix cast to restricted __le32 2018-01-28 22:17:24 -05:00
nubus
nvdimm Merge branch 'for-4.16/nfit' into libnvdimm-for-next 2018-02-03 00:26:26 -07:00
nvme for-linus-20180204 2018-02-04 11:16:35 -08:00
nvmem
of pci-v4.16-changes 2018-02-06 09:59:40 -08:00
opp
oprofile
parisc
parport
pci pci-v4.16-changes 2018-02-06 09:59:40 -08:00
pcmcia
perf
phy USB/PHY updates for 4.16-rc1 2018-02-01 09:40:49 -08:00
pinctrl This is the bulk of pin control changes for the v4.16 kernel cycle: 2018-02-02 14:22:53 -08:00
platform Driver Core updates for 4.16-rc1 2018-02-01 10:00:28 -08:00
pnp
power power supply and reset changes for the v4.16 series 2018-01-31 12:55:31 -08:00
powercap
pps
ps3
ptp
pwm
rapidio
ras
regulator Merge remote-tracking branch 'regulator/topic/tps65218' into regulator-next 2018-01-26 17:57:05 +00:00
remoteproc remoteproc updates for v4.16 2018-02-05 10:07:40 -08:00
reset
rpmsg rpmsg updates for v4.16 2018-02-05 10:05:40 -08:00
rtc RTC for 4.16 2018-02-02 14:19:19 -08:00
s390 libnvdimm for 4.16 2018-02-06 10:41:33 -08:00
sbus pci-v4.16-changes 2018-02-06 09:59:40 -08:00
scsi for-linus-20180204 2018-02-04 11:16:35 -08:00
sfi
sh
siox
slimbus
sn
soc ARM: SoC driver updates for 4.16 2018-02-01 16:35:31 -08:00
soundwire
spi Merge remote-tracking branch 'spi/topic/xilinx' into spi-next 2018-01-26 17:57:34 +00:00
spmi
ssb
staging media updates for v4.16-rc1 2018-02-06 11:27:48 -08:00
target Merge branch 'for-4.16/block' of git://git.kernel.dk/linux-block 2018-01-29 11:51:49 -08:00
tc
tee
thermal Driver Core updates for 4.16-rc1 2018-02-01 10:00:28 -08:00
thunderbolt
tty Driver Core updates for 4.16-rc1 2018-02-01 10:00:28 -08:00
uio Char/Misc driver patches for 4.16-rc1 2018-02-01 10:31:17 -08:00
usb pinctrl: files should directly include apis they use 2018-02-05 09:41:54 -08:00
uwb
vfio VFIO updates for v4.16-rc1 2018-02-01 13:18:25 -08:00
vhost Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2018-01-31 14:31:10 -08:00
video pci-v4.16-changes 2018-02-06 09:59:40 -08:00
virt Char/Misc driver patches for 4.16-rc1 2018-02-01 10:31:17 -08:00
virtio
visorbus
vlynq
vme
w1 Documentation updates for 4.16. New stuff includes refcount_t 2018-01-31 19:25:25 -08:00
watchdog
xen dma mapping changes for Linux 4.16: 2018-01-31 11:32:27 -08:00
zorro
Kconfig Char/Misc driver patches for 4.16-rc1 2018-02-01 10:31:17 -08:00
Makefile pci-v4.16-changes 2018-02-06 09:59:40 -08:00