]> git.ipfire.org Git - thirdparty/kernel/stable.git/commit
xhci: Fix port resume done detection for SS ports with LPM enabled
authorMathias Nyman <mathias.nyman@linux.intel.com>
Fri, 22 Mar 2019 15:50:15 +0000 (17:50 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 3 Apr 2019 04:23:28 +0000 (06:23 +0200)
commit78d145f71db5c2b32b24baba875da651c92a7b1f
treea43b1856afc7d65b3c1c140e792cb926bf7ed3c4
parent9aacea736c9a218d04cb01fff289a35d67d358cf
xhci: Fix port resume done detection for SS ports with LPM enabled

commit 6cbcf596934c8e16d6288c7cc62dfb7ad8eadf15 upstream.

A suspended SS port in U3 link state will go to U0 when resumed, but
can almost immediately after that enter U1 or U2 link power save
states before host controller driver reads the port status.

Host controller driver only checks for U0 state, and might miss
the finished resume, leaving flags unclear and skip notifying usb
code of the wake.

Add U1 and U2 to the possible link states when checking for finished
port resume.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/host/xhci-ring.c
drivers/usb/host/xhci.h