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Vincent Palatin 0bd860493f USB: quirks: ignore remote wake-up on Fibocom L850-GL LTE modem
This LTE modem (M.2 card) has a bug in its power management:
there is some kind of race condition for U3 wake-up between the host and
the device. The modem firmware sometimes crashes/locks when both events
happen at the same time and the modem fully drops off the USB bus (and
sometimes re-enumerates, sometimes just gets stuck until the next
reboot).

Tested with the modem wired to the XHCI controller on an AMD 3015Ce
platform. Without the patch, the modem dropped of the USB bus 5 times in
3 days. With the quirk, it stayed connected for a week while the
'runtime_suspended_time' counter incremented as excepted.

Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
Link: https://lore.kernel.org/r/20210319124802.2315195-1-vpalatin@chromium.org
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-03-23 13:27:40 +01:00
arch Boundary condition fixes for bugs unearthed by the perf fuzzer. 2021-03-21 11:26:21 -07:00
block
certs
crypto
Documentation
drivers USB: quirks: ignore remote wake-up on Fibocom L850-GL LTE modem 2021-03-23 13:27:40 +01:00
fs Miscellaneous ext4 bug fixes for v5.12. 2021-03-21 14:06:10 -07:00
include USB / Thunderbolt driver fixes for 5.12-rc4 2021-03-21 11:49:16 -07:00
init
ipc
kernel io_uring-5.12-2021-03-21 2021-03-21 12:25:54 -07:00
lib
LICENSES
mm
net
samples
scripts
security
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tools
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
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Makefile Linux 5.12-rc4 2021-03-21 14:56:43 -07:00
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.