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a20c7f36bd
linux/drivers
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Mika Westerberg a20c7f36bd PCI: Do not allocate more buses than available in parent 
One can ask more buses to be reserved for hotplug bridges by passing
pci=hpbussize=N in the kernel command line.  If the parent bus does not
have enough bus space available we incorrectly create child bus with the
requested number of subordinate buses.

In the example below hpbussize is set to one more than we have available
buses in the root port:

  pci 0000:07:00.0: [8086:1578] type 01 class 0x060400
  pci 0000:07:00.0: scanning [bus 00-00] behind bridge, pass 0
  pci 0000:07:00.0: bridge configuration invalid ([bus 00-00]), reconfiguring
  pci 0000:07:00.0: scanning [bus 00-00] behind bridge, pass 1
  pci_bus 0000:08: busn_res: can not insert [bus 08-ff] under [bus 07-3f] (conflicts with (null) [bus 07-3f])
  pci_bus 0000:08: scanning bus
  ...
  pci_bus 0000:0a: bus scan returning with max=40
  pci_bus 0000:0a: busn_res: [bus 0a-ff] end is updated to 40
  pci_bus 0000:0a: [bus 0a-40] partially hidden behind bridge 0000:07 [bus 07-3f]
  pci_bus 0000:08: bus scan returning with max=40
  pci_bus 0000:08: busn_res: [bus 08-ff] end is updated to 40

Instead of allowing this, limit the subordinate number to be less than or
equal the maximum subordinate number allocated for the parent bus (if it
has any).

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
[bhelgaas: remove irrelevant dmesg messages]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-11-06 18:48:59 -06:00
..
accessibility
acpi Merge branch 'acpi-apei' 2017-09-28 22:18:15 +02:00
amba
android ANDROID: binder: don't queue async transactions to thread. 2017-09-01 09:22:50 +02:00
ata Merge branch 'for-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 2017-09-06 22:41:21 -07:00
atm
auxdisplay
base PM / OPP: Call notifier without holding opp_table->lock 2017-09-26 00:44:32 +02:00
bcma
block loop: remove union of use_aio and ref in struct loop_cmd 2017-09-25 08:56:05 -06:00
bluetooth
bus ARM: SoC driver updates for v4.14 2017-09-10 20:40:00 -07:00
cdrom
char Merge branch 'next-tpm' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2017-09-24 11:34:28 -07:00
clk The diff is dominated by the Allwinner A10/A20 SoCs getting converted to 2017-09-13 11:04:14 -07:00
clocksource x86/numachip: Add const and __initconst to numachip2_clockevent 2017-09-25 09:36:15 +02:00
connector
cpufreq cpufreq: dt: Fix sysfs duplicate filename creation for platform-device 2017-09-26 01:10:08 +02:00
cpuidle ARM: cpuidle: Avoid memleak if init fail 2017-09-19 23:10:51 +02:00
crypto crypto: caam - fix LS1021A support on ARMv7 multiplatform kernel 2017-09-20 17:42:42 +08:00
dax - Some request-based DM core and DM multipath fixes and cleanups 2017-09-14 13:43:16 -07:00
dca
devfreq
dio
dma dmaengine updates for 4.14-rc1 2017-09-07 14:03:05 -07:00
dma-buf
edac
eisa
extcon
firewire
firmware dmi: Mark all struct dmi_system_id instances const 2017-09-14 11:59:30 +02:00
fmc
fpga
fsi
gpio - New Drivers 2017-09-07 13:51:13 -07:00
gpu Merge tag 'drm-misc-fixes-2017-09-28-1' of git://anongit.freedesktop.org/git/drm-misc into drm-fixes 2017-09-29 17:11:04 +10:00
hid media updates for v4.14-rc1 2017-09-07 12:53:14 -07:00
hsi
hv Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-09-07 09:25:15 -07:00
hwmon dmi: Mark all struct dmi_system_id instances const 2017-09-14 11:59:30 +02:00
hwspinlock
hwtracing
i2c i2c: i2c-stm32f7: add driver 2017-09-14 17:34:43 +02:00
ide Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block 2017-09-07 11:59:42 -07:00
idle Power management updates for v4.14-rc1 2017-09-05 12:19:08 -07:00
iio - New Drivers 2017-09-07 13:51:13 -07:00
infiniband IB/hfi1: Unsuccessful PCIe caps tuning should not fail driver load 2017-09-27 11:10:36 -04:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2017-09-22 17:23:41 -10:00
iommu iommu/amd: pr_err() strings should end with newlines 2017-09-27 17:01:35 +02:00
ipack
irqchip irqchip/mips-gic: Use effective affinity to unmask 2017-09-25 21:23:44 +02:00
isdn isdn/i4l: fetch the ppp_write buffer in one shot 2017-09-20 16:01:36 -07:00
leds as3645a: Unregister indicator LED on device unbind 2017-09-23 21:17:43 +02:00
lightnvm
macintosh powerpc/macintosh: constify wf_sensor_ops structures 2017-09-01 16:42:54 +10:00
mailbox Just behavorial changes to a controller driver: 2017-09-07 13:23:37 -07:00
mcb Char/Misc drivers for 4.14-rc1 2017-09-05 11:08:17 -07:00
md md/raid5: cap worker count 2017-09-27 20:08:44 -07:00
media Merge branch 'work.set_fs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2017-09-14 18:13:32 -07:00
memory ARM: SoC driver updates for v4.14 2017-09-10 20:40:00 -07:00
memstick
message scsi: scsi_transport_sas: switch to bsg-lib for SMP passthrough 2017-08-29 21:51:45 -04:00
mfd dmi: Mark all struct dmi_system_id instances const 2017-09-14 11:59:30 +02:00
misc mm: treewide: remove GFP_TEMPORARY allocation flag 2017-09-13 18:53:16 -07:00
mmc MMC host: 2017-09-26 16:54:22 -07:00
mtd mtd: nand: atmel: fix buffer overflow in atmel_pmecc_user 2017-09-27 17:33:28 +02:00
mux mux: make device_type const 2017-08-29 13:46:35 +02:00
net net: phy: Fix truncation of large IRQ numbers in phy_attached_print() 2017-09-21 20:35:17 -07:00
nfc
ntb
nubus
nvdimm libnvdimm, namespace: fix btt claim class crash 2017-09-18 17:29:01 -07:00
nvme nvme-fcloop: fix port deletes and callbacks 2017-09-25 12:42:11 -06:00
nvmem
of dma-mapping updates for 4.14: 2017-09-12 13:30:06 -07:00
oprofile
parisc
parport Char/Misc drivers for 4.14-rc1 2017-09-05 11:08:17 -07:00
pci PCI: Do not allocate more buses than available in parent 2017-11-06 18:48:59 -06:00
pcmcia PCI: Add for_each_pci_bridge() helper 2017-11-06 18:48:58 -06:00
perf drivers/perf: arm_pmu_acpi: Release memory obtained by kasprintf 2017-09-22 15:11:46 +01:00
phy Merge branch '4.14-features' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2017-09-15 20:43:33 -07:00
pinctrl pinctrl/amd: save pin registers over suspend/resume 2017-09-12 15:58:45 +02:00
platform platform/x86: fujitsu-laptop: Don't oops when FUJ02E3 is not presnt 2017-09-27 00:04:43 -07:00
pnp dmi: Mark all struct dmi_system_id instances const 2017-09-14 11:59:30 +02:00
power power supply and reset changes for the v4.14 series 2017-09-09 14:44:39 -07:00
powercap
pps drivers/pps: use surrounding "if PPS" to remove numerous dependency checks 2017-09-08 18:26:51 -07:00
ps3
ptp
pwm pwm: Changes for v4.14-rc1 2017-09-11 13:04:32 -07:00
rapidio
ras
regulator - New Drivers 2017-09-07 13:51:13 -07:00
remoteproc rpmsg updates for v4.14 2017-09-09 14:34:38 -07:00
reset Merge branch '4.14-features' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2017-09-15 20:43:33 -07:00
rpmsg rpmsg: glink: initialize ret to zero to ensure error status check is correct 2017-09-04 10:52:30 -07:00
rtc RTC for 4.14 2017-09-13 10:56:00 -07:00
s390 s390/cio: recover from bad paths 2017-09-19 08:36:19 +02:00
sbus
scsi SCSI fixes on 20170930 2017-09-30 12:50:56 -07:00
sfi
sh
sn
soc Merge branch '4.14-features' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2017-09-15 20:43:33 -07:00
spi ACPI updates for v4.14-rc1 2017-09-05 12:45:03 -07:00
spmi
ssb
staging Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2017-09-14 18:54:01 -07:00
target Merge branch 'work.set_fs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2017-09-14 18:13:32 -07:00
tc
tee
thermal Merge branches 'thermal-core', 'thermal-soc', 'thermal-intel' and 'const-thermal-zone-structure' into next 2017-09-08 11:20:04 +08:00
thunderbolt ACPI updates for v4.14-rc1 2017-09-05 12:45:03 -07:00
tty dmi: Mark all struct dmi_system_id instances const 2017-09-14 11:59:30 +02:00
uio
usb Merge branch 'work.set_fs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2017-09-14 18:13:32 -07:00
uwb
vfio vfio: platform: constify amba_id 2017-08-30 14:03:42 -06:00
vhost lib/interval_tree: fast overlap detection 2017-09-08 18:26:49 -07:00
video fbdev changes for v4.14: 2017-09-14 13:33:33 -07:00
virt virt: Convert to using %pOF instead of full_name 2017-08-29 08:52:51 -05:00
virtio SCSI misc on 20170907 2017-09-07 21:11:05 -07:00
vlynq
vme
w1 power supply and reset changes for the v4.14 series 2017-09-09 14:44:39 -07:00
watchdog Merge branch '4.14-features' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2017-09-15 20:43:33 -07:00
xen xen: fixes for 4.14-rc3 2017-09-29 12:24:28 -07:00
zorro
Kconfig
Makefile