dingtianhong 0e40523287 PCI: fix oops when try to find Root Port for a PCI device ... Eric report a oops when booting the system after applying the commit a99b646afa ("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: a99b646afa ("PCI: Disable PCIe Relaxed Ordering if unsupported") Fixes: c56d4450eb ("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>		2017-08-15 17:25:16 -07:00
..
accessibility	…
acpi	Merge branches 'acpi-soc', 'acpi-wdat' and 'acpi-cppc'	2017-08-03 20:30:18 +02:00
amba	…
android	binder: Use wake up hint for synchronous transactions.	2017-07-17 14:44:19 +02:00
ata	libata: fix a couple of doc build warnings	2017-07-31 08:03:06 -07:00
atm	atm: zatm: Fix an error handling path in 'zatm_init_one()'	2017-07-18 11:37:46 -07:00
auxdisplay	…
base	dma mapping fixes for 4.13-rc2:	2017-07-25 17:17:18 -07:00
bcma	…
block	sunvdc: prevent sunvdc panic when mpgroup disk added to guest domain	2017-08-09 22:22:32 -07:00
bluetooth	…
bus	bus: uniphier-system-bus: set up registers when resuming	2017-08-04 12:57:18 +02:00
cdrom	…
char	random: fix warning message on ia64 and parisc	2017-08-08 09:36:46 -07:00
clk	clk: keystone: sci-clk: Fix sci_clk_get	2017-08-02 18:37:26 -07:00
clocksource	clocksource/drivers/timer-of: Handle of_irq_get_byname() result correctly	2017-07-17 22:43:00 +02:00
connector	…
cpufreq	Merge branches 'pm-cpufreq-x86', 'pm-cpufreq-docs' and 'intel_pstate'	2017-08-03 20:29:24 +02:00
cpuidle	…
crypto	crypto: inside-secure - fix the sha state length in hmac_sha1_setkey	2017-08-03 13:36:11 +08:00
dax	- A few DM integrity fixes that improve performance. One that address	2017-07-28 12:17:17 -07:00
dca	…
devfreq	…
dio	…
dma	…
dma-buf	Merge branch 'drm-misc-next-fixes' into drm-misc-fixes	2017-07-17 11:56:07 -04:00
edac	…
eisa	…
extcon	…
firewire	…
firmware	…
fmc	…
fpga	…
fsi	drivers/fsi: fix fsi_slave_mode prototype	2017-07-17 16:13:54 +02:00
gpio	gpio: tegra: fix unbalanced chained_irq_enter/exit	2017-08-02 10:42:38 +02:00
gpu	Merge branch 'drm-fixes-4.13' of git://people.freedesktop.org/~agd5f/linux into drm-fixes	2017-08-04 11:43:14 +10:00
hid	HID: ortek: add one more buggy device	2017-07-24 17:38:21 +02:00
hsi	…
hv	vmbus: re-enable channel tasklet	2017-07-17 15:00:47 +02:00
hwmon	hwmon: (applesmc) Avoid buffer overruns	2017-07-15 16:38:56 -07:00
hwspinlock	…
hwtracing	…
i2c	i2c: allow i2c-versatile for ARM MPS platforms	2017-07-31 17:05:16 +02:00
ide	ide: avoid warning for timings calculation	2017-07-21 04:37:22 +01:00
idle	…
iio	…
infiniband	IPoIB fixes for 4.13	2017-08-07 13:30:40 -04:00
input	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2017-07-14 22:53:37 -07:00
iommu	iommu/amd: Fix schedule-while-atomic BUG in initialization code	2017-07-26 15:39:14 +02:00
ipack	…
irqchip	irqchip/digicolor: Drop unnecessary static	2017-07-18 21:59:23 +02:00
isdn	mISDN: Fix null pointer dereference at mISDN_FsmNew	2017-08-11 14:56:23 -07:00
leds	…
lguest	…
lightnvm	lightnvm: pblk: advance bio according to lba index	2017-07-28 08:06:00 -06:00
macintosh	…
mailbox	mailbox: pcc: Fix crash when request PCC channel 0	2017-07-26 02:11:47 +02:00
mcb	…
md	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md	2017-07-28 12:24:21 -07:00
media	media: platform: davinci: drop VPFE_CMD_S_CCDC_RAW_PARAMS	2017-07-26 06:14:33 -04:00
memory	…
memstick	…
message	…
mfd	…
misc	…
mmc	mmc: block: bypass the queue even if usage is present for hotplug	2017-08-03 11:00:39 +02:00
mtd	mtd: nand: atmel: Fix EDO mode check	2017-08-02 10:26:43 +02:00
mux	mux: mux-core: unregister mux_class in mux_exit()	2017-07-17 16:38:35 +02:00
net	sfc: don't try and read ef10 data on non-ef10 NIC	2017-08-15 17:19:34 -07:00
nfc	…
ntb	…
nubus	…
nvdimm	libnvdimm: fix badblock range handling of ARS range	2017-07-17 11:43:58 -07:00
nvme	nvme: validate admin queue before unquiesce	2017-07-26 17:41:41 +02:00
nvmem	nvmem: rockchip-efuse: amend compatible rk322x-efuse to rk3228-efuse	2017-07-17 16:15:57 +02:00
of	Merge remote-tracking branches 'asoc/fix/dpcm', 'asoc/fix/imx', 'asoc/fix/msm8916', 'asoc/fix/multi-pcm', 'asoc/fix/of-graph' and 'asoc/fix/pxa' into asoc-linus	2017-08-01 15:17:06 +01:00
oprofile	…
parisc	parisc: pdc_stable: Fix locking when creating sysfs links	2017-07-31 16:43:13 +02:00
parport	…
pci	PCI: fix oops when try to find Root Port for a PCI device	2017-08-15 17:25:16 -07:00
pcmcia	…
perf	drivers/perf: arm_pmu: Request PMU SPIs with IRQF_PER_CPU	2017-07-27 13:43:22 +01:00
phy	phy: bcm-ns-usb3: fix MDIO_BUS dependency	2017-07-27 17:20:19 -07:00
pinctrl	Pin control fixes for the v4.13 cycle:	2017-08-09 14:30:34 -07:00
platform	platform/x86: intel-vbtn: match power button on press rather than release	2017-08-05 14:37:19 -07:00
pnp	…
power	…
powercap	…
pps	…
ps3	…
ptp	ptp: introduce ptp auxiliary worker	2017-08-01 15:22:55 -07:00
pwm	…
rapidio	…
ras	…
regulator	…
remoteproc	…
reset	…
rpmsg	…
rtc	…
s390	s390/qeth: fix L3 next-hop in xmit qeth hdr	2017-08-07 11:24:37 -07:00
sbus	sbus: Convert to using %pOF instead of full_name	2017-07-20 12:37:10 -07:00
scsi	SCSI fixes on 20170808	2017-08-08 09:38:41 -07:00
sfi	…
sh	…
sn	…
soc	soc: zte: Restrict SOC_ZTE to ARCH_ZX or COMPILE_TEST	2017-07-27 13:12:34 +02:00
spi	…
spmi	spmi: pmic-arb: Always allocate ppid_to_apid table	2017-07-17 15:00:47 +02:00
ssb	…
staging	media fixes for v4.13-rc2	2017-08-05 14:09:26 -07:00
target	Add wait_for_random_bytes() and get_random_*_wait() functions so that	2017-07-15 12:44:02 -07:00
tc	…
tee	…
thermal	…
thunderbolt	Merge branches 'pm-core' and 'pm-misc'	2017-08-03 20:29:45 +02:00
tty	gpio: exar: Use correct property prefix and document bindings	2017-08-01 13:43:55 +02:00
uio	…
usb	xhci: fix memleak in xhci_run()	2017-07-20 14:40:36 +02:00
uwb	…
vfio	vfio/pci: Fix handling of RC integrated endpoint PCIe capability size	2017-07-27 10:39:33 -06:00
vhost	Revert "vhost: cache used event for better performance"	2017-07-29 14:15:56 -07:00
video	…
virt	…
virtio	virtio-balloon: coding format cleanup	2017-07-25 16:37:35 +03:00
vlynq	…
vme	…
w1	w1: omap-hdq: fix error return code in omap_hdq_probe()	2017-07-17 16:48:15 +02:00
watchdog	…
xen	xen: dont fiddle with event channel masking in suspend/resume	2017-07-27 19:55:46 +02:00
zorro	…
Kconfig	…
Makefile	…