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| Filename | Latest commit message | Latest commit date |
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a0a18484ce
commit 159daf1258227f44b26b5d38f4aa8f37b8cca663 upstream.
The fastboot tool for communicating with Android bootloaders does not
work reliably with this device if USB 2 Link Power Management (LPM)
is enabled.
Various fastboot commands are affected, including the
following, which usually reproduces the problem within two tries:
fastboot getvar kernel
getvar:kernel FAILED (remote: 'GetVar Variable Not found')
This issue was hidden on many systems up until commit 63a1f8454962
("xhci: stored cached port capability values in one place") as the xhci
driver failed to detect USB 2 LPM support if USB 3 ports were listed
before USB 2 ports in the "supported protocol capabilities".
Adding the quirk resolves the issue. No drawbacks are expected since
the device uses different USB product IDs outside of fastboot mode, and
since fastboot commands worked before, until LPM was enabled on the
tested system by the aforementioned commit.
Based on a patch from Forest <forestix@nom.one> from which most of the
code and commit message is taken.
Cc: stable <stable@kernel.org>
Reported-by: Forest <forestix@nom.one>
Closes: https://lore.kernel.org/hk8umj9lv4l4qguftdq1luqtdrpa1gks5l@sonic.net
Tested-by: Forest <forestix@nom.one>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20250206151836.51742-1-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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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.