AuxXxilium/linux_dsm_epyc7002
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3051f39253
linux_dsm_epyc7002/drivers
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Michael Ellerman 3051f39253 ehea: Fix memory hook reference counting crashes 
The recent commit to only register the EHEA memory hotplug hooks on
adapter probe has a few problems.

Firstly the reference counting is wrong for multiple adapters, in that
the hooks are registered multiple times. Secondly the check in the tear
down path is backward. Finally the error path doesn't decrement the
count.

The multiple registration of the hooks is the biggest problem, as it
leads to oopses when the system is rebooted, and/or errors during memory
hotplug, eg:

  $ ./mem-on-off-test.sh -r 2
  ...
  ehea: memory is going offline
  ehea: LPAR memory changed - re-initializing driver
  ehea: re-initializing driver complete
  ehea: memory is going offline
  ehea: LPAR memory changed - re-initializing driver
  ehea: opcode=26c ret=fffffffffffffffc arg1=8000000003000003 arg2=0 arg3=700000060000d600 arg4=3fded0000 arg5=200 arg6=0 arg7=0
  ehea: register_rpage_mr failed
  ehea: registering mr failed
  ehea: register MR failed - driver inoperable!
  ehea: memory is going offline

Fixes: aa18332331 ("ehea: Register memory hotplug, reboot and crash hooks on adapter probe")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-04-25 14:33:04 -04:00
..
accessibility
acpi ACPICA updates for v4.1-rc1 2015-04-17 15:01:29 -04:00
amba
android
ata powerpc updates for 4.1 2015-04-16 13:53:32 -05:00
atm
auxdisplay
base power: wakeup: remove use of seq_printf return value 2015-04-15 16:35:24 -07:00
bcma Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2015-04-17 15:50:54 -04:00
block Merge branch 'x86-pmem-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-04-18 11:42:49 -04:00
bluetooth Bluetooth: btusb: Use proper data structures for Intel vendor events 2015-04-09 10:42:18 +03:00
bus ARM: SoC driver updates for v4.1 2015-04-22 09:18:17 -07:00
cdrom
char Char/Misc driver patches for 4.1-rc1 2015-04-21 09:42:58 -07:00
clk ARM: SoC multiplatform code changes for v4.1 2015-04-22 09:20:15 -07:00
clocksource ARM: SoC driver updates for v4.1 2015-04-22 09:18:17 -07:00
connector
cpufreq intel_pstate: Knights Landing support 2015-04-11 02:13:29 +02:00
cpuidle ARM: SoC fixes for v4.1 2015-04-22 09:03:30 -07:00
crypto This is the final removal (after several years!) of the obsolete cpus_* 2015-04-20 10:19:03 -07:00
dca
devfreq
dio
dma dmaengine: hsu: don't prompt for hsu_core part 2015-04-22 09:28:32 -07:00
dma-buf
edac
eisa
extcon Char/Misc driver patches for 4.1-rc1 2015-04-21 09:42:58 -07:00
firewire
firmware ARM: SoC driver updates for v4.1 2015-04-22 09:18:17 -07:00
fmc
gpio ARM: SoC cleanups for v4.1 2015-04-22 09:04:39 -07:00
gpu fbdev changes for v4.1 2015-04-20 15:16:25 -07:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2015-04-14 18:25:15 -07:00
hsi HSI: cmt_speech: fix error return code 2015-04-05 14:45:27 +02:00
hv
hwmon hwmon: (w83795) use find_closest_descending() in pwm_freq_to_reg() 2015-04-17 09:03:55 -04:00
hwspinlock
hwtracing/coresight Char/Misc driver patches for 4.1-rc1 2015-04-21 09:42:58 -07:00
i2c i2c: core: Export bus recovery functions 2015-04-15 21:02:07 +02:00
ide ide: remove deprecated use of pci api 2015-04-17 15:32:07 -04:00
idle Power management and ACPI updates for v4.1-rc1 2015-04-14 20:21:54 -07:00
iio Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2015-04-14 09:50:27 -07:00
infiniband Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-04-17 16:31:08 -04:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2015-04-21 12:54:08 -07:00
iommu IOMMU Updates for Linux v4.1 2015-04-20 10:50:05 -07:00
ipack
irqchip This is the final removal (after several years!) of the obsolete cpus_* 2015-04-20 10:19:03 -07:00
isdn Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2015-04-15 09:00:47 -07:00
leds This is the bulk of GPIO changes for the v4.1 development 2015-04-18 08:22:10 -04:00
lguest
macintosh Merge branch 'next-remove-ldst' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc into next 2015-04-07 13:25:14 +10:00
mailbox
mcb
md - Most extensive changes this cycle are the DM core improvements to add 2015-04-18 08:14:18 -04:00
media media: remove unused variable that causes a warning 2015-04-21 12:49:33 -07:00
memory ARM: SoC driver updates for v4.1 2015-04-22 09:18:17 -07:00
memstick memstick: mspro_block: add missing curly braces 2015-04-17 09:04:09 -04:00
message
mfd == Changes to existing drivers == 2015-04-14 17:29:55 -07:00
misc Char/Misc driver patches for 4.1-rc1 2015-04-21 09:42:58 -07:00
mmc MMC core: 2015-04-22 09:29:08 -07:00
mtd This pull request includes the following UBI/UBIFS changes: 2015-04-15 13:43:40 -07:00
net ehea: Fix memory hook reference counting crashes 2015-04-25 14:33:04 -04:00
nfc NFC: logging neatening 2015-04-07 12:05:12 +02:00
ntb
nubus
of Devicetree changes for v4.1 2015-04-18 08:30:10 -04:00
oprofile oprofile: reduce mmap_sem hold for mm->exe_file 2015-04-17 09:04:11 -04:00
parisc parisc: Eliminate sg_virt_addr() and private scatterlist.h 2015-04-21 22:02:43 +02:00
parport
pci xen: features and fixes for 4.1-rc0 2015-04-16 14:01:03 -05:00
pcmcia ARM: SoC cleanups for v4.1 2015-04-22 09:04:39 -07:00
phy USB patches for 4.1-rc1 2015-04-13 17:07:21 -07:00
pinctrl pinctrl: fix allmodconfig noise 2015-04-15 10:02:42 +02:00
platform Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2015-04-17 15:50:54 -04:00
pnp Power management and ACPI updates for v4.1-rc1 2015-04-14 20:21:54 -07:00
power power: twl4030_madc_battery: Add missing MODULE_ALIAS 2015-04-06 19:39:57 +02:00
powercap powercap / RAPL: mark rapl_ids array as __initconst 2015-04-11 02:21:15 +02:00
pps
ps3
ptp
pwm
rapidio
ras
regulator == Changes to existing drivers == 2015-04-14 17:29:55 -07:00
remoteproc
reset
rpmsg
rtc drivers/rtc/rtc-at91rm9200.c: make IO endian agnostic 2015-04-17 09:04:12 -04:00
s390 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2015-04-20 10:15:33 -07:00
sbus drivers/sbus/char/envctrl.c: ignore orderly_poweroff return value 2015-04-15 16:35:23 -07:00
scsi SCSI misc on 20150419 2015-04-20 15:25:19 -07:00
sfi
sh
sn
soc - fix unused variable warning for pmic-wrapper 2015-04-14 00:43:28 +02:00
spi Merge remote-tracking branches 'spi/topic/spidev' and 'spi/topic/spidev-test' into spi-next 2015-04-11 23:09:31 +01:00
spmi
ssb Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2015-04-17 15:50:54 -04:00
staging Merge branch 'drm-next-merged' of git://people.freedesktop.org/~airlied/linux into v4l_for_linus 2015-04-21 09:44:55 -03:00
target iscsi target: fix oops when adding reject pdu 2015-04-10 12:33:55 -07:00
tc
thermal drivers: thermal: st: remove several sparse warnings 2015-04-07 13:43:28 -07:00
thunderbolt
tty TTY/Serial patches for 4.1-rc1 2015-04-21 09:33:10 -07:00
uio
usb Merge branch 'drm-next-merged' of git://people.freedesktop.org/~airlied/linux into v4l_for_linus 2015-04-21 09:44:55 -03:00
uwb
vfio vfio-pci: Fix use after free 2015-04-08 08:11:51 -06:00
vhost new helper: msg_data_left() 2015-04-11 15:53:35 -04:00
video fbdev changes for v4.1 2015-04-20 15:16:25 -07:00
virt
virtio
vlynq
vme
w1
watchdog ARM: SoC driver updates for v4.1 2015-04-22 09:18:17 -07:00
xen xen: features and fixes for 4.1-rc0 2015-04-16 14:01:03 -05:00
zorro
Kconfig
Makefile