queue-4.4/usb-core-add-pm-runtime-calls-to-usb_hcd_platform_sh.patch

   1 From d880d712872ce346685c8199a47ddcbdcb29eb6d Mon Sep 17 00:00:00 2001
   2 From: Tony Lindgren <tony@atomide.com>
   3 Date: Fri, 22 Mar 2019 14:54:05 -0700
   4 Subject: usb: core: Add PM runtime calls to usb_hcd_platform_shutdown
   5
   6 [ Upstream commit 8ead7e817224d7832fe51a19783cb8fcadc79467 ]
   7
   8 If ohci-platform is runtime suspended, we can currently get an "imprecise
   9 external abort" on reboot with ohci-platform loaded when PM runtime
  10 is implemented for the SoC.
  11
  12 Let's fix this by adding PM runtime support to usb_hcd_platform_shutdown.
  13
  14 Signed-off-by: Tony Lindgren <tony@atomide.com>
  15 Acked-by: Alan Stern <stern@rowland.harvard.edu>
  16 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  17 Signed-off-by: Sasha Levin <sashal@kernel.org>
  18 ---
  19  drivers/usb/core/hcd.c | 3 +++
  20  1 file changed, 3 insertions(+)
  21
  22 diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
  23 index 9c4f9b6e57e29..99c146f4b6b51 100644
  24 --- a/drivers/usb/core/hcd.c
  25 +++ b/drivers/usb/core/hcd.c
  26 @@ -3007,6 +3007,9 @@ usb_hcd_platform_shutdown(struct platform_device *dev)
  27  {
  28         struct usb_hcd *hcd = platform_get_drvdata(dev);
  29
  30 +       /* No need for pm_runtime_put(), we're shutting down */
  31 +       pm_runtime_get_sync(&dev->dev);
  32 +
  33         if (hcd->driver->shutdown)
  34                 hcd->driver->shutdown(hcd);
  35  }
  36 --
  37 2.20.1
  38