Revision 0e405232871d67bf1b238d56b6b3d500e69ebbf3 authored by dingtianhong on 15 August 2017, 15:24:48 UTC, committed by David S. Miller on 16 August 2017, 00:25:16 UTC
Eric report a oops when booting the system after applying the commit a99b646afa8a ("PCI: Disable PCIe Relaxed..."): [ 4.241029] BUG: unable to handle kernel NULL pointer dereference at 0000000000000050 [ 4.247001] IP: pci_find_pcie_root_port+0x62/0x80 [ 4.253011] PGD 0 [ 4.253011] P4D 0 [ 4.253011] [ 4.258013] Oops: 0000 [#1] SMP DEBUG_PAGEALLOC [ 4.262015] Modules linked in: [ 4.265005] CPU: 31 PID: 1 Comm: swapper/0 Not tainted 4.13.0-dbx-DEV #316 [ 4.271002] Hardware name: Intel RML,PCH/Iota_QC_19, BIOS 2.40.0 06/22/2016 [ 4.279002] task: ffffa2ee38cfa040 task.stack: ffffa51ec0004000 [ 4.285001] RIP: 0010:pci_find_pcie_root_port+0x62/0x80 [ 4.290012] RSP: 0000:ffffa51ec0007ab8 EFLAGS: 00010246 [ 4.295003] RAX: 0000000000000000 RBX: ffffa2ee36bae000 RCX: 0000000000000006 [ 4.303002] RDX: 000000000000081c RSI: ffffa2ee38cfa8c8 RDI: ffffa2ee36bae000 [ 4.310013] RBP: ffffa51ec0007b58 R08: 0000000000000001 R09: 0000000000000000 [ 4.317001] R10: 0000000000000000 R11: 0000000000000000 R12: ffffa51ec0007ad0 [ 4.324005] R13: ffffa2ee36bae098 R14: 0000000000000002 R15: ffffa2ee37204818 [ 4.331002] FS: 0000000000000000(0000) GS:ffffa2ee3fcc0000(0000) knlGS:0000000000000000 [ 4.339002] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 4.345001] CR2: 0000000000000050 CR3: 000000401000f000 CR4: 00000000001406e0 [ 4.351002] Call Trace: [ 4.354012] ? pci_configure_device+0x19f/0x570 [ 4.359002] ? pci_conf1_read+0xb8/0xf0 [ 4.363002] ? raw_pci_read+0x23/0x40 [ 4.366011] ? pci_read+0x2c/0x30 [ 4.370014] ? pci_read_config_word+0x67/0x70 [ 4.374012] pci_device_add+0x28/0x230 [ 4.378012] ? pci_vpd_f0_read+0x50/0x80 [ 4.382014] pci_scan_single_device+0x96/0xc0 [ 4.386012] pci_scan_slot+0x79/0xf0 [ 4.389001] pci_scan_child_bus+0x31/0x180 [ 4.394014] acpi_pci_root_create+0x1c6/0x240 [ 4.398013] pci_acpi_scan_root+0x15f/0x1b0 [ 4.402012] acpi_pci_root_add+0x2e6/0x400 [ 4.406012] ? acpi_evaluate_integer+0x37/0x60 [ 4.411002] acpi_bus_attach+0xdf/0x200 [ 4.415002] acpi_bus_attach+0x6a/0x200 [ 4.418014] acpi_bus_attach+0x6a/0x200 [ 4.422013] acpi_bus_scan+0x38/0x70 [ 4.426011] acpi_scan_init+0x10c/0x271 [ 4.429001] acpi_init+0x2fa/0x348 [ 4.433004] ? acpi_sleep_proc_init+0x2d/0x2d [ 4.437001] do_one_initcall+0x43/0x169 [ 4.441001] kernel_init_freeable+0x1d0/0x258 [ 4.445003] ? rest_init+0xe0/0xe0 [ 4.449001] kernel_init+0xe/0x150 ====================== cut here ============================= It looks like the pci_find_pcie_root_port() was trying to find the Root Port for the PCI device which is the Root Port already, it will return NULL and trigger the problem, so check the highest_pcie_bridge to fix thie problem. Fixes: a99b646afa8a ("PCI: Disable PCIe Relaxed Ordering if unsupported") Fixes: c56d4450eb68 ("PCI: Turn off Request Attributes to avoid Chelsio T5 Completion erratum") Reported-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Ding Tianhong <dingtianhong@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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842 | ||
fonts | ||
lz4 | ||
lzo | ||
mpi | ||
raid6 | ||
reed_solomon | ||
xz | ||
zlib_deflate | ||
zlib_inflate | ||
.gitignore | -rw-r--r-- | 70 bytes |
Kconfig | -rw-r--r-- | 12.6 KB |
Kconfig.debug | -rw-r--r-- | 65.2 KB |
Kconfig.kasan | -rw-r--r-- | 1.8 KB |
Kconfig.kgdb | -rw-r--r-- | 4.1 KB |
Kconfig.kmemcheck | -rw-r--r-- | 2.9 KB |
Kconfig.ubsan | -rw-r--r-- | 1.5 KB |
Makefile | -rw-r--r-- | 7.7 KB |
argv_split.c | -rw-r--r-- | 2.1 KB |
asn1_decoder.c | -rw-r--r-- | 13.2 KB |
assoc_array.c | -rw-r--r-- | 52.6 KB |
atomic64.c | -rw-r--r-- | 4.8 KB |
atomic64_test.c | -rw-r--r-- | 6.6 KB |
audit.c | -rw-r--r-- | 1.7 KB |
bcd.c | -rw-r--r-- | 261 bytes |
bch.c | -rw-r--r-- | 35.6 KB |
bitmap.c | -rw-r--r-- | 36.5 KB |
bitrev.c | -rw-r--r-- | 1.9 KB |
bsearch.c | -rw-r--r-- | 1.5 KB |
btree.c | -rw-r--r-- | 19.2 KB |
bug.c | -rw-r--r-- | 4.9 KB |
build_OID_registry | -rwxr-xr-x | 4.7 KB |
bust_spinlocks.c | -rw-r--r-- | 660 bytes |
chacha20.c | -rw-r--r-- | 2.6 KB |
check_signature.c | -rw-r--r-- | 599 bytes |
checksum.c | -rw-r--r-- | 5.0 KB |
clz_ctz.c | -rw-r--r-- | 1.3 KB |
clz_tab.c | -rw-r--r-- | 855 bytes |
cmdline.c | -rw-r--r-- | 5.1 KB |
compat_audit.c | -rw-r--r-- | 796 bytes |
cordic.c | -rw-r--r-- | 2.5 KB |
cpu_rmap.c | -rw-r--r-- | 7.8 KB |
cpumask.c | -rw-r--r-- | 5.3 KB |
crc-ccitt.c | -rw-r--r-- | 3.0 KB |
crc-itu-t.c | -rw-r--r-- | 2.8 KB |
crc-t10dif.c | -rw-r--r-- | 1.6 KB |
crc16.c | -rw-r--r-- | 2.8 KB |
crc32.c | -rw-r--r-- | 9.1 KB |
crc32defs.h | -rw-r--r-- | 2.0 KB |
crc32test.c | -rw-r--r-- | 37.5 KB |
crc4.c | -rw-r--r-- | 1.1 KB |
crc7.c | -rw-r--r-- | 2.6 KB |
crc8.c | -rw-r--r-- | 2.4 KB |
ctype.c | -rw-r--r-- | 1.4 KB |
debug_info.c | -rw-r--r-- | 741 bytes |
debug_locks.c | -rw-r--r-- | 1.2 KB |
debugobjects.c | -rw-r--r-- | 28.2 KB |
dec_and_lock.c | -rw-r--r-- | 784 bytes |
decompress.c | -rw-r--r-- | 1.7 KB |
decompress_bunzip2.c | -rw-r--r-- | 23.5 KB |
decompress_inflate.c | -rw-r--r-- | 4.4 KB |
decompress_unlz4.c | -rw-r--r-- | 4.2 KB |
decompress_unlzma.c | -rw-r--r-- | 15.8 KB |
decompress_unlzo.c | -rw-r--r-- | 7.1 KB |
decompress_unxz.c | -rw-r--r-- | 10.9 KB |
devres.c | -rw-r--r-- | 9.8 KB |
digsig.c | -rw-r--r-- | 5.6 KB |
div64.c | -rw-r--r-- | 4.1 KB |
dma-debug.c | -rw-r--r-- | 44.2 KB |
dma-noop.c | -rw-r--r-- | 1.6 KB |
dma-virt.c | -rw-r--r-- | 1.4 KB |
dump_stack.c | -rw-r--r-- | 1.2 KB |
dynamic_debug.c | -rw-r--r-- | 25.3 KB |
dynamic_queue_limits.c | -rw-r--r-- | 4.3 KB |
earlycpio.c | -rw-r--r-- | 4.0 KB |
errseq.c | -rw-r--r-- | 6.5 KB |
extable.c | -rw-r--r-- | 3.2 KB |
fault-inject.c | -rw-r--r-- | 6.2 KB |
fdt.c | -rw-r--r-- | 69 bytes |
fdt_empty_tree.c | -rw-r--r-- | 80 bytes |
fdt_ro.c | -rw-r--r-- | 72 bytes |
fdt_rw.c | -rw-r--r-- | 72 bytes |
fdt_strerror.c | -rw-r--r-- | 78 bytes |
fdt_sw.c | -rw-r--r-- | 72 bytes |
fdt_wip.c | -rw-r--r-- | 73 bytes |
find_bit.c | -rw-r--r-- | 4.5 KB |
flex_array.c | -rw-r--r-- | 11.0 KB |
flex_proportions.c | -rw-r--r-- | 6.9 KB |
gcd.c | -rw-r--r-- | 1.3 KB |
gen_crc32table.c | -rw-r--r-- | 3.2 KB |
genalloc.c | -rw-r--r-- | 21.6 KB |
glob.c | -rw-r--r-- | 3.5 KB |
globtest.c | -rw-r--r-- | 4.2 KB |
hexdump.c | -rw-r--r-- | 8.3 KB |
hweight.c | -rw-r--r-- | 2.0 KB |
idr.c | -rw-r--r-- | 14.3 KB |
inflate.c | -rw-r--r-- | 38.6 KB |
int_sqrt.c | -rw-r--r-- | 652 bytes |
interval_tree.c | -rw-r--r-- | 499 bytes |
interval_tree_test.c | -rw-r--r-- | 3.3 KB |
iomap.c | -rw-r--r-- | 6.5 KB |
iomap_copy.c | -rw-r--r-- | 2.8 KB |
iommu-common.c | -rw-r--r-- | 7.0 KB |
iommu-helper.c | -rw-r--r-- | 1.0 KB |
ioremap.c | -rw-r--r-- | 4.1 KB |
iov_iter.c | -rw-r--r-- | 33.6 KB |
irq_poll.c | -rw-r--r-- | 5.4 KB |
irq_regs.c | -rw-r--r-- | 604 bytes |
is_single_threaded.c | -rw-r--r-- | 1.4 KB |
jedec_ddr_data.c | -rw-r--r-- | 3.0 KB |
kasprintf.c | -rw-r--r-- | 1.4 KB |
kfifo.c | -rw-r--r-- | 12.7 KB |
klist.c | -rw-r--r-- | 10.3 KB |
kobject.c | -rw-r--r-- | 26.1 KB |
kobject_uevent.c | -rw-r--r-- | 14.3 KB |
kstrtox.c | -rw-r--r-- | 10.6 KB |
kstrtox.h | -rw-r--r-- | 254 bytes |
lcm.c | -rw-r--r-- | 441 bytes |
libcrc32c.c | -rw-r--r-- | 2.1 KB |
list_debug.c | -rw-r--r-- | 1.8 KB |
list_sort.c | -rw-r--r-- | 3.5 KB |
llist.c | -rw-r--r-- | 3.1 KB |
locking-selftest-hardirq.h | -rw-r--r-- | 207 bytes |
locking-selftest-mutex.h | -rw-r--r-- | 120 bytes |
locking-selftest-rlock-hardirq.h | -rw-r--r-- | 74 bytes |
locking-selftest-rlock-softirq.h | -rw-r--r-- | 74 bytes |
locking-selftest-rlock.h | -rw-r--r-- | 158 bytes |
locking-selftest-rsem.h | -rw-r--r-- | 163 bytes |
locking-selftest-rtmutex.h | -rw-r--r-- | 123 bytes |
locking-selftest-softirq.h | -rw-r--r-- | 207 bytes |
locking-selftest-spin-hardirq.h | -rw-r--r-- | 73 bytes |
locking-selftest-spin-softirq.h | -rw-r--r-- | 73 bytes |
locking-selftest-spin.h | -rw-r--r-- | 118 bytes |
locking-selftest-wlock-hardirq.h | -rw-r--r-- | 74 bytes |
locking-selftest-wlock-softirq.h | -rw-r--r-- | 74 bytes |
locking-selftest-wlock.h | -rw-r--r-- | 158 bytes |
locking-selftest-wsem.h | -rw-r--r-- | 163 bytes |
locking-selftest.c | -rw-r--r-- | 41.9 KB |
lockref.c | -rw-r--r-- | 3.9 KB |
lru_cache.c | -rw-r--r-- | 19.4 KB |
memory-notifier-error-inject.c | -rw-r--r-- | 1.1 KB |
memweight.c | -rw-r--r-- | 999 bytes |
net_utils.c | -rw-r--r-- | 604 bytes |
netdev-notifier-error-inject.c | -rw-r--r-- | 1.5 KB |
nlattr.c | -rw-r--r-- | 15.8 KB |
nmi_backtrace.c | -rw-r--r-- | 3.1 KB |
nodemask.c | -rw-r--r-- | 617 bytes |
notifier-error-inject.c | -rw-r--r-- | 2.7 KB |
notifier-error-inject.h | -rw-r--r-- | 614 bytes |
of-reconfig-notifier-error-inject.c | -rw-r--r-- | 1.3 KB |
oid_registry.c | -rw-r--r-- | 3.8 KB |
once.c | -rw-r--r-- | 1.3 KB |
parman.c | -rw-r--r-- | 10.6 KB |
parser.c | -rw-r--r-- | 8.4 KB |
pci_iomap.c | -rw-r--r-- | 4.2 KB |
percpu-refcount.c | -rw-r--r-- | 12.4 KB |
percpu_counter.c | -rw-r--r-- | 5.8 KB |
percpu_ida.c | -rw-r--r-- | 9.5 KB |
percpu_test.c | -rw-r--r-- | 3.2 KB |
plist.c | -rw-r--r-- | 5.9 KB |
pm-notifier-error-inject.c | -rw-r--r-- | 1.1 KB |
prime_numbers.c | -rw-r--r-- | 6.5 KB |
radix-tree.c | -rw-r--r-- | 62.3 KB |
random32.c | -rw-r--r-- | 12.7 KB |
ratelimit.c | -rw-r--r-- | 1.6 KB |
rational.c | -rw-r--r-- | 1.5 KB |
rbtree.c | -rw-r--r-- | 17.4 KB |
rbtree_test.c | -rw-r--r-- | 5.5 KB |
reciprocal_div.c | -rw-r--r-- | 492 bytes |
refcount.c | -rw-r--r-- | 10.2 KB |
rhashtable.c | -rw-r--r-- | 27.0 KB |
sbitmap.c | -rw-r--r-- | 12.5 KB |
scatterlist.c | -rw-r--r-- | 19.5 KB |
seq_buf.c | -rw-r--r-- | 7.8 KB |
sg_pool.c | -rw-r--r-- | 3.6 KB |
sg_split.c | -rw-r--r-- | 5.1 KB |
sha1.c | -rw-r--r-- | 6.1 KB |
show_mem.c | -rw-r--r-- | 1.3 KB |
siphash.c | -rw-r--r-- | 11.7 KB |
smp_processor_id.c | -rw-r--r-- | 1.3 KB |
sort.c | -rw-r--r-- | 2.4 KB |
stackdepot.c | -rw-r--r-- | 8.5 KB |
stmp_device.c | -rw-r--r-- | 2.1 KB |
string.c | -rw-r--r-- | 20.7 KB |
string_helpers.c | -rw-r--r-- | 13.5 KB |
strncpy_from_user.c | -rw-r--r-- | 3.1 KB |
strnlen_user.c | -rw-r--r-- | 3.4 KB |
swiotlb.c | -rw-r--r-- | 28.3 KB |
syscall.c | -rw-r--r-- | 2.6 KB |
test-kstrtox.c | -rw-r--r-- | 17.3 KB |
test-string_helpers.c | -rw-r--r-- | 10.3 KB |
test_bitmap.c | -rw-r--r-- | 9.9 KB |
test_bpf.c | -rw-r--r-- | 139.0 KB |
test_firmware.c | -rw-r--r-- | 4.8 KB |
test_hash.c | -rw-r--r-- | 6.3 KB |
test_hexdump.c | -rw-r--r-- | 5.7 KB |
test_kasan.c | -rw-r--r-- | 10.0 KB |
test_kmod.c | -rw-r--r-- | 30.3 KB |
test_list_sort.c | -rw-r--r-- | 3.4 KB |
test_module.c | -rw-r--r-- | 753 bytes |
test_parman.c | -rw-r--r-- | 11.2 KB |
test_printf.c | -rw-r--r-- | 12.4 KB |
test_rhashtable.c | -rw-r--r-- | 10.6 KB |
test_siphash.c | -rw-r--r-- | 7.5 KB |
test_sort.c | -rw-r--r-- | 754 bytes |
test_static_key_base.c | -rw-r--r-- | 2.0 KB |
test_static_keys.c | -rw-r--r-- | 6.0 KB |
test_sysctl.c | -rw-r--r-- | 3.3 KB |
test_user_copy.c | -rw-r--r-- | 5.6 KB |
test_uuid.c | -rw-r--r-- | 3.4 KB |
textsearch.c | -rw-r--r-- | 9.4 KB |
timerqueue.c | -rw-r--r-- | 3.1 KB |
ts_bm.c | -rw-r--r-- | 5.3 KB |
ts_fsm.c | -rw-r--r-- | 10.6 KB |
ts_kmp.c | -rw-r--r-- | 4.3 KB |
ubsan.c | -rw-r--r-- | 10.9 KB |
ubsan.h | -rw-r--r-- | 1.5 KB |
ucs2_string.c | -rw-r--r-- | 2.4 KB |
usercopy.c | -rw-r--r-- | 728 bytes |
uuid.c | -rw-r--r-- | 3.1 KB |
vsprintf.c | -rw-r--r-- | 70.4 KB |
win_minmax.c | -rw-r--r-- | 3.3 KB |
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