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linux-next/include
Stefan Mätje 4ec73791a6 PCI: Work around Pericom PCIe-to-PCI bridge Retrain Link erratum
Due to an erratum in some Pericom PCIe-to-PCI bridges in reverse mode
(conventional PCI on primary side, PCIe on downstream side), the Retrain
Link bit needs to be cleared manually to allow the link training to
complete successfully.

If it is not cleared manually, the link training is continuously restarted
and no devices below the PCI-to-PCIe bridge can be accessed.  That means
drivers for devices below the bridge will be loaded but won't work and may
even crash because the driver is only reading 0xffff.

See the Pericom Errata Sheet PI7C9X111SLB_errata_rev1.2_102711.pdf for
details.  Devices known as affected so far are: PI7C9X110, PI7C9X111SL,
PI7C9X130.

Add a new flag, clear_retrain_link, in struct pci_dev.  Quirks for affected
devices set this bit.

Note that pcie_retrain_link() lives in aspm.c because that's currently the
only place we use it, but this erratum is not specific to ASPM, and we may
retrain links for other reasons in the future.

Signed-off-by: Stefan Mätje <stefan.maetje@esd.eu>
[bhelgaas: apply regardless of CONFIG_PCIEASPM]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
CC: stable@vger.kernel.org
2019-04-06 09:25:47 -05:00
..
acpi ACPI updates for 5.1-rc1 2019-03-06 13:33:11 -08:00
asm-generic kbuild: force all architectures except um to include mandatory-y 2019-03-17 12:56:32 +09:00
clocksource clocksource/arm_arch_timer: Store physical timer IRQ number for KVM on VHE 2019-02-19 21:05:22 +00:00
crypto
drm drm i915, amdgpu, qxl and etnaviv fixes 2019-03-15 13:58:35 -07:00
dt-bindings We have a fairly balanced mix of clk driver updates and clk framework 2019-03-14 08:46:17 -07:00
keys Merge branch 'next-integrity' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2019-03-10 17:32:04 -07:00
kvm ARM: some cleanups, direct physical timer assignment, cache sanitization 2019-03-15 15:00:28 -07:00
linux PCI: Work around Pericom PCIe-to-PCI bridge Retrain Link erratum 2019-04-06 09:25:47 -05:00
math-emu
media media: include: fix several typos 2019-03-01 09:45:52 -05:00
memory
misc
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-03-14 09:28:12 -07:00
pcmcia
ras
rdma RDMA: Handle ucontext allocations by IB/core 2019-02-22 14:11:37 -07:00
scsi scsi: kill command serial number 2019-02-27 09:19:24 -05:00
soc IOMMU Updates for Linux v5.1 2019-03-10 12:29:52 -07:00
sound sound fixes for 5.1-rc1 2019-03-15 14:05:00 -07:00
target
trace NFS client bugfixes for Linux 5.1 2019-03-16 12:28:18 -07:00
uapi Kbuild updates for v5.1 (2nd) 2019-03-17 13:25:26 -07:00
video media updates for v5.1-rc1 2019-03-09 14:45:54 -08:00
xen