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Manikanta Maddireddy 15947c862f PCI: tegra194: Disable LTSSM after transition to Detect on surprise link down 
[ Upstream commit 9fa0c242f8 ]

After the link reaches a Detect-related LTSSM state, disable LTSSM so it
does not keep toggling between Polling and Detect. Do this by polling for
the Detect state first, then clearing APPL_CTRL_LTSSM_EN in both
tegra_pcie_dw_pme_turnoff() and pex_ep_event_pex_rst_assert().

Fixes: 56e15a238d ("PCI: tegra: Add Tegra194 PCIe support")
Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
Signed-off-by: Manikanta Maddireddy <mmaddireddy@nvidia.com>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Link: https://patch.msgid.link/20260324190755.1094879-4-mmaddireddy@nvidia.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2026-06-01 17:35:32 +02:00
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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.