linux/drivers/pci
Bjorn Helgaas e68d281cee PCI/DPC: Process RP PIO details only if RP PIO extensions supported
The RP PIO registers (status, mask, severity, etc) are only implemented if
the "RP Extensions for DPC" bit is set in the DPC Capabilities register.

Previously we called dpc_process_rp_pio_error(), which reads and decodes
those RP PIO registers, whenever the DPC Status register indicated an "RP
PIO error" (Trigger Reason == 3 and Trigger Reason Extension == 0).

It does seem reasonable to assume that DPC Status would only indicate an RP
PIO error if the RP extensions are supported, but PCIe r4.0, sec 7.9.15.4,
is actually not explicit about that: it does not say "Trigger Reason
Extension == 0 is valid only for Root Ports that support RP Extensions for
DPC."

Check whether the RP Extensions for DPC are supported before trying to read
the RP PIO registers.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sinan Kaya <okaya@codeaurora.org>
2018-01-30 15:25:39 -06:00
..
dwc pci-v4.15-changes 2017-11-15 15:01:28 -08:00
endpoint PCI: endpoint: make config_item_type const 2017-10-19 16:15:25 +02:00
host PCI: rcar: Fix use-after-free in probe error path 2017-12-12 11:01:47 -06:00
hotplug pci-v4.15-changes 2017-11-15 15:01:28 -08:00
pcie PCI/DPC: Process RP PIO details only if RP PIO extensions supported 2018-01-30 15:25:39 -06:00
switch Support for the switchtec ntb and related changes. Also, a couple of 2017-11-19 20:41:53 -10:00
access.c PCI: Provide Kconfig option for lockless config space accessors 2017-06-28 22:32:56 +02:00
ats.c PCI: Restore PRI and PASID state after Function-Level Reset 2017-05-30 15:40:50 -05:00
bus.c PCI: Autosense device removal in pci_bridge_d3_update() 2016-11-17 18:44:56 -06:00
ecam.c PCI: ECAM: Map config region with pci_remap_cfgspace() 2017-04-24 13:53:14 -05:00
host-bridge.c
iov.c PCI: Restore ARI Capable Hierarchy before setting numVFs 2017-10-10 19:15:29 -05:00
irq.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Kconfig Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-11-26 14:11:54 -08:00
Makefile Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-11-26 14:11:54 -08:00
mmap.c PCI: Add I/O BAR support to generic pci_mmap_resource_range() 2017-04-20 08:47:47 -05:00
msi.c PCI/MSI: Set MSI_FLAG_MUST_REACTIVATE in core code 2017-10-18 15:38:31 +02:00
of.c
pci-acpi.c ACPI / PCI: Bail early in acpi_pci_add_bus() if there is no ACPI handle 2017-10-05 15:48:54 -05:00
pci-driver.c PM / sleep: Avoid excess pm_runtime_enable() calls in device_resume() 2017-12-11 14:32:56 +01:00
pci-label.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pci-mid.c PCI / PM: Simplify device wakeup settings code 2017-06-28 01:52:45 +02:00
pci-stub.c
pci-sysfs.c pci-v4.15-changes 2017-11-15 15:01:28 -08:00
pci.c pci-v4.15-changes 2017-11-15 15:01:28 -08:00
pci.h pci-v4.15-changes 2017-11-15 15:01:28 -08:00
probe.c PCI: Distribute available buses to hotplug-capable bridges 2017-11-06 18:48:59 -06:00
proc.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
quirks.c pci-v4.15-changes 2017-11-15 15:01:28 -08:00
remove.c PCI: Detach driver before procfs & sysfs teardown on device remove 2017-10-25 08:47:10 -05:00
rom.c PCI: Fail pci_map_rom() if the option ROM is invalid 2017-11-08 14:47:07 -06:00
search.c PCI: Add device flag PCI_DEV_FLAGS_BRIDGE_XLATE_ROOT 2017-04-13 18:49:50 -05:00
setup-bus.c Merge branch 'pci/resource' into next 2017-11-14 12:11:25 -06:00
setup-irq.c PCI: Inline and remove pcibios_update_irq() 2017-08-10 12:49:57 -05:00
setup-res.c pci-v4.15-changes 2017-11-15 15:01:28 -08:00
slot.c locking/atomic, kref: Add kref_read() 2017-01-14 11:37:18 +01:00
syscall.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
vc.c
vpd.c
xen-pcifront.c xen: make use of xenbus_read_unsigned() in xen-pcifront 2016-11-07 13:55:26 +01:00