Skip to content
Snippets Groups Projects
Commit e90b0bc5 authored by Mathias Nyman's avatar Mathias Nyman Committed by Greg Kroah-Hartman
Browse files

USB: Add USB_QUIRK_NO_LPM quirk for sony xperia xz1 smartphone


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 63a1f845
("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: default avatarForest <forestix@nom.one>
Closes: https://lore.kernel.org/hk8umj9lv4l4qguftdq1luqtdrpa1gks5l@sonic.net


Tested-by: default avatarForest <forestix@nom.one>
Signed-off-by: default avatarMathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20250206151836.51742-1-mathias.nyman@linux.intel.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 0ac7f613
No related branches found
No related tags found
Loading
Loading
0% Loading or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment