Qian Cai 8cf6650421 iommu/amd: fix a crash in iova_magazine_free_pfns ... The commit b3aa14f022 ("iommu: remove the mapping_error dma_map_ops method") incorrectly changed the checking from dma_ops_alloc_iova() in map_sg() causes a crash under memory pressure as dma_ops_alloc_iova() never return DMA_MAPPING_ERROR on failure but 0, so the error handling is all wrong. kernel BUG at drivers/iommu/iova.c:801! Workqueue: kblockd blk_mq_run_work_fn RIP: 0010:iova_magazine_free_pfns+0x7d/0xc0 Call Trace: free_cpu_cached_iovas+0xbd/0x150 alloc_iova_fast+0x8c/0xba dma_ops_alloc_iova.isra.6+0x65/0xa0 map_sg+0x8c/0x2a0 scsi_dma_map+0xc6/0x160 pqi_aio_submit_io+0x1f6/0x440 [smartpqi] pqi_scsi_queue_command+0x90c/0xdd0 [smartpqi] scsi_queue_rq+0x79c/0x1200 blk_mq_dispatch_rq_list+0x4dc/0xb70 blk_mq_sched_dispatch_requests+0x249/0x310 __blk_mq_run_hw_queue+0x128/0x200 blk_mq_run_work_fn+0x27/0x30 process_one_work+0x522/0xa10 worker_thread+0x63/0x5b0 kthread+0x1d2/0x1f0 ret_from_fork+0x22/0x40 Fixes: b3aa14f022 ("iommu: remove the mapping_error dma_map_ops method") Signed-off-by: Qian Cai <cai@lca.pw> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2019-07-21 09:57:13 -07:00
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accessibility
acpi
amba
android
ata
atm
auxdisplay
base
bcma
block
bluetooth
bus	ARM: SoC-related driver updates	2019-07-19 17:13:56 -07:00
cdrom
char
clk
clocksource
connector
counter
cpufreq
cpuidle
crypto	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2019-07-19 12:23:37 -07:00
dax
dca
devfreq
dio
dma
dma-buf
edac
eisa
extcon
firewire
firmware	ARM: SoC-related driver updates	2019-07-19 17:13:56 -07:00
fpga
fsi
gnss
gpio
gpu	drm fixes for -rc1:	2019-07-19 12:29:43 -07:00
hid
hsi
hv
hwmon	ARM: SoC-related driver updates	2019-07-19 17:13:56 -07:00
hwspinlock
hwtracing
i2c
i3c
ide
idle
iio
infiniband	SCSI fixes on 20190720	2019-07-20 10:04:58 -07:00
input	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2019-07-20 12:22:30 -07:00
interconnect
iommu	iommu/amd: fix a crash in iova_magazine_free_pfns	2019-07-21 09:57:13 -07:00
ipack
irqchip
isdn
leds
lightnvm
macintosh
mailbox
mcb
md
media
memory	Kbuild updates for v5.3 (2nd)	2019-07-20 09:34:55 -07:00
memstick
message
mfd
misc
mmc
mtd
mux
net
nfc
ntb	New feature to add support for NTB virtual MSI interrupts, the ability	2019-07-21 09:46:59 -07:00
nubus
nvdimm
nvme
nvmem
of
opp
oprofile
parisc
parport
pci	New feature to add support for NTB virtual MSI interrupts, the ability	2019-07-21 09:46:59 -07:00
pcmcia
perf
phy
pinctrl
platform
pnp
power
powercap
pps
ps3
ptp
pwm
rapidio
ras
regulator
remoteproc
reset	ARM: SoC-related driver updates	2019-07-19 17:13:56 -07:00
rpmsg
rtc
s390	SCSI fixes on 20190720	2019-07-20 10:04:58 -07:00
sbus
scsi	SCSI fixes on 20190720	2019-07-20 10:04:58 -07:00
sfi
sh
siox
slimbus
sn
soc	ARM: Device-tree updates	2019-07-19 17:19:24 -07:00
soundwire
spi
spmi
ssb
staging
target
tc
tee
thermal
thunderbolt
tty	ARM: SoC platform updates	2019-07-19 17:05:08 -07:00
uio
usb
uwb
vfio
vhost
video
virt
virtio
visorbus
vlynq
vme
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