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xhci: Limit USB2 port wake support for AMD Promontory hosts

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commit dec08194ff upstream.

For AMD Promontory xHCI host, although you can disable USB 2.0 ports in
BIOS settings, those ports will be enabled anyway after you remove a
device on that port and re-plug it in again. It's a known limitation of
the chip. As a workaround we can clear the PORT_WAKE_BITS.

This will disable wake on connect, disconnect and overcurrent on
AMD Promontory USB2 ports

[checkpatch cleanup and commit message reword -Mathias]
Cc: Tsai Nicholas <nicholas.tsai@amd.com>
Signed-off-by: Jiahau Chang <Lars_Chang@asmedia.com.tw>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
This commit is contained in:
Jiahau Chang 2017-06-19 13:08:30 +03:00 • committed by Ben Hutchings
commit d4c75eaeb9
3 changed files with 16 additions and 0 deletions
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