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Rob Herring 275e88b06a PCI: tegra: Fix host link initialization Commit `b9ac0f9dc8` ("PCI: dwc: Move dw_pcie_setup_rc() to DWC common code") broke enumeration of downstream devices on Tegra: In non-working case (next-20201211): 0001:00:00.0 PCI bridge: NVIDIA Corporation Device 1ad2 (rev a1) 0001:01:00.0 SATA controller: Marvell Technology Group Ltd. Device 9171 (rev 13) 0005:00:00.0 PCI bridge: NVIDIA Corporation Device 1ad0 (rev a1) In working case (v5.10-rc7): 0001:00:00.0 PCI bridge: Molex Incorporated Device 1ad2 (rev a1) 0001:01:00.0 SATA controller: Marvell Technology Group Ltd. Device 9171 (rev 13) 0005:00:00.0 PCI bridge: Molex Incorporated Device 1ad0 (rev a1) 0005:01:00.0 PCI bridge: PLX Technology, Inc. Device 3380 (rev ab) 0005:02:02.0 PCI bridge: PLX Technology, Inc. Device 3380 (rev ab) 0005:03:00.0 USB controller: PLX Technology, Inc. Device 3380 (rev ab) The problem seems to be dw_pcie_setup_rc() is now called twice before and after the link up handling. The fix is to move Tegra's link up handling to .start_link() function like other DWC drivers. Tegra is a bit more complicated than others as it re-inits the whole DWC controller to retry the link. With this, the initialization ordering is restored to match the prior sequence. Fixes: `b9ac0f9dc8` ("PCI: dwc: Move dw_pcie_setup_rc() to DWC common code") Link: https://lore.kernel.org/r/20201218143905.1614098-1-robh@kernel.org Reported-by: Mian Yousaf Kaukab <ykaukab@suse.de> Tested-by: Mian Yousaf Kaukab <ykaukab@suse.de> Signed-off-by: Rob Herring <robh@kernel.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Thierry Reding <thierry.reding@gmail.com> Cc: Jonathan Hunter <jonathanh@nvidia.com> Cc: Vidya Sagar <vidyas@nvidia.com>		2020-12-25 21:58:36 -06:00
arch	A set of x86 fixes:	2020-11-08 10:09:36 -08:00
block	blk-mq: mark flush request as IDLE in flush_end_io()	2020-10-30 08:33:49 -06:00
certs
crypto
Documentation	Merge branch 'remotes/lorenzo/pci/rcar'	2020-12-15 15:11:13 -06:00
drivers	PCI: tegra: Fix host link initialization	2020-12-25 21:58:36 -06:00
fs	Fixes for 5.10-rc3:	2020-11-08 10:23:07 -08:00
include	Merge branch 'pci/ecam'	2020-12-15 15:11:10 -06:00
init
ipc
kernel	fork: fix copy_process(CLONE_PARENT) race with the exiting ->real_parent	2020-11-08 11:18:39 -08:00
lib	drm fixes for 5.10-rc3	2020-11-06 12:54:00 -08:00
LICENSES
mm	mm/truncate.c: make __invalidate_mapping_pages() static	2020-11-02 12:14:19 -08:00
net	Networking fixes for 5.10-rc3, including fixes from wireless, can,	2020-11-06 11:50:28 -08:00
samples
scripts	Driver core documentation fixes for 5.10-rc3	2020-11-08 11:30:25 -08:00
security
sound	ASoC: Fixes for v5.10	2020-11-05 18:19:32 +01:00
tools	linux-kselftest-fixes-5.10-rc3	2020-11-06 15:42:42 -08:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS	MAINTAINERS: Add missing documentation references to PCI Endpoint Subsystem	2020-11-19 10:40:32 +00:00
Makefile	Linux 5.10-rc3	2020-11-08 16:10:16 -08:00
README

README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.