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| author |   Henry Lin <henryl@nvidia.com> | 2022-03-03 13:08:58 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-03-03 15:46:07 +0100 |
| commit | 70c05e4cf63054cd755ca66c1819327b22cb085f (patch) | |
| tree | 66b3688362619e0a7bbbedcaa8b4602c22c4bc9e /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | xhci: fix uninitialized string returned by xhci_decode_ctrl_ctx() (diff) | |
| download | wireguard-linux-70c05e4cf63054cd755ca66c1819327b22cb085f.tar.xz wireguard-linux-70c05e4cf63054cd755ca66c1819327b22cb085f.zip | |
xhci: fix runtime PM imbalance in USB2 resume
A race between system resume and device-initiated resume may result in
runtime PM imbalance on USB2 root hub. If a device-initiated resume
starts and system resume xhci_bus_resume() directs U0 before hub driver
sees the resuming device in RESUME state, device-initiated resume will
not be finished in xhci_handle_usb2_port_link_resume(). In this case,
usb_hcd_end_port_resume() call is missing.
This changes calls usb_hcd_end_port_resume() if resuming device reaches
U0 to keep runtime PM balance.
Fixes: a231ec41e6f6 ("xhci: refactor U0 link state handling in get_port_status")
Cc: stable@vger.kernel.org
Signed-off-by: Henry Lin <henryl@nvidia.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20220303110903.1662404-5-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions