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linux/drivers
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Myron Stowe 9670f1a473 PCI: Restore detection of read-only BARs 
commit 36e8164882 upstream.

Commit 6ac665c63d ("PCI: rewrite PCI BAR reading code") masked off
low-order bits from 'l', but not from 'sz'.  Both are passed to pci_size(),
which compares 'base == maxbase' to check for read-only BARs.  The masking
of 'l' means that comparison will never be 'true', so the check for
read-only BARs no longer works.

Resolve this by also masking off the low-order bits of 'sz' before passing
it into pci_size() as 'maxbase'.  With this change, pci_size() will once
again catch the problems that have been encountered to date:

  - AGP aperture BAR of AMD-7xx host bridges: if the AGP window is
    disabled, this BAR is read-only and read as 0x00000008 [1]

  - BARs 0-4 of ALi IDE controllers can be non-zero and read-only [1]

  - Intel Sandy Bridge - Thermal Management Controller [8086:0103];
    BAR 0 returning 0xfed98004 [2]

  - Intel Xeon E5 v3/Core i7 Power Control Unit [8086:2fc0];
    Bar 0 returning 0x00001a [3]

Link: [1] https://git.kernel.org/cgit/linux/kernel/git/tglx/history.git/commit/drivers/pci/probe.c?id=1307ef6621991f1c4bc3cec1b5a4ebd6fd3d66b9 ("PCI: probing read-only BARs" (pre-git))
Link: [2] https://bugzilla.kernel.org/show_bug.cgi?id=43331
Link: [3] https://bugzilla.kernel.org/show_bug.cgi?id=85991
Reported-by: William Unruh <unruh@physics.ubc.ca>
Reported-by: Martin Lucina <martin@lucina.net>
Signed-off-by: Myron Stowe <myron.stowe@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-16 06:59:00 -08:00
..
accessibility
acpi ACPICA: Update to GPIO region handler interface. 2014-10-05 14:54:11 -07:00
amba
ata sata_fsl: fix error handling of irq_of_parse_and_map 2014-12-16 09:09:42 -08:00
atm atm: idt77252: fix dev refcnt leak 2013-12-08 07:29:25 -08:00
auxdisplay
base sysfs: driver core: Fix glue dir race condition by gdp_mutex 2014-11-14 08:48:01 -08:00
bcma
block sunvdc: don't call VD_OP_GET_VTOC 2014-11-21 09:22:52 -08:00
bluetooth Bluetooth: Fix issue with USB suspend in btusb driver 2014-10-30 09:35:12 -07:00
bus bus: mvebu-mbus: allow several windows with the same target/attribute 2014-06-07 13:25:37 -07:00
cdrom drivers/cdrom/cdrom.c: use kzalloc() for failing hardware 2013-07-13 11:42:26 -07:00
char random: add and use memzero_explicit() for clearing data 2014-11-14 08:47:55 -08:00
clk clk: spear3xx: Use proper control register offset 2014-07-17 15:58:02 -07:00
clocksource clocksource: Exynos_mct: Register clock event after request_irq() 2014-06-07 13:25:29 -07:00
connector net: Use netlink_ns_capable to verify the permisions of netlink messages 2014-06-26 15:12:37 -04:00
cpufreq cpufreq: intel_pstate: Fix setting max_perf_pct in performance policy 2014-11-14 08:47:58 -08:00
cpuidle cpuidle: Check the result of cpuidle_get_driver() against NULL 2014-04-14 06:42:15 -07:00
crypto crypto: ux500 - make interrupt mode plausible 2014-09-05 16:28:35 -07:00
dca
devfreq
dio
dma ioat: fix tasklet tear down 2014-03-06 21:30:14 -08:00
edac cpc925_edac: Report UE events properly 2014-11-14 08:48:00 -08:00
eisa Revert "EISA: Initialize device before its resources" 2014-02-13 13:47:59 -08:00
extcon extcon: max77693: Fix two NULL pointer exceptions on missing pdata 2014-07-06 18:54:15 -07:00
firewire firewire: cdev: prevent kernel stack leaking into ioctl arguments 2014-11-21 09:22:53 -08:00
firmware firmware: Do not use WARN_ON(!spin_is_locked()) 2014-09-17 09:03:57 -07:00
gpio gpio: mxs: Allow for recursive enable_irq_wake() call 2014-05-13 13:59:45 +02:00
gpu drm/i915: Unlock panel even when LVDS is disabled 2014-12-16 09:09:42 -08:00
hid HID: logitech-dj: prevent false errors to be shown 2014-10-05 14:54:08 -07:00
hsi
hv Drivers: hv: vmbus: Fix a bug in vmbus_open() 2014-10-30 09:35:11 -07:00
hwmon hwmon: (dme1737) Prevent overflow problem when writing large limits 2014-09-05 16:28:35 -07:00
hwspinlock
i2c i2c: davinci: generate STP always when NACK is received 2014-12-16 09:09:42 -08:00
ide
idle x86 idle: Repair large-server 50-watt idle-power regression 2014-01-09 12:24:21 -08:00
iio iio:inkern: fix overwritten -EPROBE_DEFER in of_iio_channel_get_by_name 2014-10-05 14:54:12 -07:00
infiniband iser-target: Handle DEVICE_REMOVAL event on network portal listener correctly 2014-12-06 15:05:49 -08:00
input Input: xpad - use proper endpoint type 2014-12-06 15:05:49 -08:00
iommu iommu/amd: Fix cleanup_domain for mass device removal 2014-09-17 09:03:57 -07:00
ipack
irqchip irqchip: gic: Fix core ID calculation when topology is read from DT 2014-07-28 08:00:06 -07:00
isdn isdnloop: several buffer overflows 2014-04-14 06:42:18 -07:00
leds leds: leds-pwm: properly clean up after probe failure 2014-06-07 13:25:34 -07:00
lguest x86, flags: Rename X86_EFLAGS_BIT1 to X86_EFLAGS_FIXED 2014-11-14 08:47:54 -08:00
macintosh powerpc/windfarm: Fix noisy slots-fan on Xserve (rm31) 2013-08-11 18:35:20 -07:00
mailbox
md dm space map metadata: fix sm_bootstrap_get_nr_blocks() 2015-01-08 09:58:15 -08:00
media media: smiapp: Only some selection targets are settable 2014-12-16 09:09:42 -08:00
memory
memstick
message mptfusion: enable no_write_same for vmware scsi disks 2014-10-30 09:35:10 -07:00
mfd mfd: tc6393xb: Fail ohci suspend if full state restore is required 2015-01-08 09:58:15 -08:00
misc mei: bus: fix possible boundaries violation 2014-11-21 09:22:55 -08:00
mmc mmc: block: add newline to sysfs display of force_ro 2015-01-08 09:58:15 -08:00
mtd UBI: add missing kmem_cache_free() in process_pool_aeb error path 2014-11-14 08:47:55 -08:00
net ath5k: fix hardware queue index assignment 2015-01-16 06:59:00 -08:00
nfc NFC: microread: Potential overflows in microread_target_discovered() 2014-10-05 14:54:12 -07:00
ntb NTB: Correct debugfs to work with more than 1 NTB Device 2013-11-13 12:05:35 +09:00
nubus
of of/base: Fix PowerPC address parsing hack 2014-12-06 15:05:47 -08:00
oprofile
parisc parisc: Fix interrupt routing for C8000 serial ports 2013-08-11 18:35:21 -07:00
parport parport: parport_pc: remove double PCI ID for NetMos 2014-02-06 11:08:15 -08:00
pci PCI: Restore detection of read-only BARs 2015-01-16 06:59:00 -08:00
pcmcia pcmcia: at91_cf: fix gpio_get_value in at91_cf_get_status 2013-07-21 18:21:25 -07:00
pinctrl pinctrl: protect pinctrl_list add 2014-02-20 11:06:11 -08:00
platform dell-wmi: Fix access out of memory 2014-11-21 09:22:55 -08:00
pnp PNP / ACPI: proper handling of ACPI IO/Memory resource parsing failures 2014-03-23 21:38:22 -07:00
power power: max17040: Fix NULL pointer dereference when there is no platform_data 2014-02-22 12:41:29 -08:00
pps
ps3
ptp
pwm
rapidio rapidio/tsi721_dma: fix failure to obtain transaction descriptor 2014-08-07 14:30:25 -07:00
regulator regulator: arizona-ldo1: remove bypass functionality 2014-09-17 09:03:57 -07:00
remoteproc
reset
rpmsg
rtc rtc: rtc-at91rm9200: fix infinite wait for ACKUPD irq 2014-06-26 15:12:37 -04:00
s390 s390/chsc: fix SEI usage on old FW levels 2014-05-13 13:59:42 +02:00
sbus bbc-i2c: Fix BBC I2C envctrl on SunBlade 2000 2014-08-14 09:24:16 +08:00
scsi megaraid_sas: corrected return of wait_event from abort frame path 2015-01-08 09:58:15 -08:00
sfi
sh
sn
spi spi: dw: Fix dynamic speed change. 2014-12-06 15:05:49 -08:00
ssb
ssbi
staging staging:iio:ade7758: Remove "raw" from channel name 2014-11-14 08:47:58 -08:00
target target: Don't call TFO->write_pending if data_length == 0 2014-12-06 15:05:49 -08:00
tc
thermal
tty tty: Fix high cpu load if tty is unreleaseable 2014-11-14 08:48:00 -08:00
uio Fix a few incorrectly checked [io_]remap_pfn_range() calls 2013-11-13 12:05:33 +09:00
usb USB: xhci: don't start a halted endpoint before its new dequeue is set 2014-12-06 15:05:48 -08:00
uwb
vfio mm: close PageTail race 2014-04-03 12:01:05 -07:00
vhost vhost: validate vhost_get_vq_desc return value 2014-04-14 06:42:18 -07:00
video framebuffer: fix border color 2014-11-14 08:47:56 -08:00
virt
virtio virtio_pci: fix virtio spec compliance on restore 2014-11-14 08:47:55 -08:00
vlynq
vme VME: Correct read/write alignment algorithm 2014-02-22 12:41:28 -08:00
w1 w1: fix w1_send_slave dropping a slave id 2014-05-06 07:55:28 -07:00
watchdog watchdog: ath79_wdt: avoid spurious restarts on AR934x 2014-07-06 18:54:14 -07:00
xen swiotlb-xen: pass dev_addr to swiotlb_tbl_unmap_single 2015-01-16 06:59:00 -08:00
zorro
Kconfig
Makefile