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authorWu Liang feng <[email protected]>2014-12-24 18:22:19 +0800
committerGreg Kroah-Hartman <[email protected]>2015-01-09 12:25:54 -0800
commit314b41b16a71ee824f55e2791fcb92997672da37 (patch)
treea9df21d88f343ee33f85b093a535fcb8780ebe98 /tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/EventClass.py
parent96e418543d27212d73f2fec76490f833baa27e3b (diff)
USB: ehci-platform: Support ehci reset after resume quirk
The Rockchip rk3288 EHCI controller doesn't properly detect the case when a device is removed during suspend. Specifically, when usb resume from suspend, the EHCI controller maintaining the USB state (FLAG_CF is 1, Current Connect Status is 1), but a USB device (like a USB camera on rk3288) may have been disconnected actually. Let's add a quirk to force ehci to go into the usb_root_hub_lost_power() path and reset after resume. This should generally reset the whole controller and all ports and initialize everything cleanly again, and bring the devices back up. As part of this, rename the "hibernation" paramter of ehci_resume() to force_reset since hibernation is simply another case where we can't trust the autodetected status and need to force a reset of devices. Signed-off-by: Wu Liang feng <[email protected]> Reviewed-by: Julius Werner <[email protected]> Reviewed-by: Doug Anderson <[email protected]> Reviewed-by: Tomasz Figa <[email protected]> Reviewed-by: Pawel Osciak <[email protected]> Reviewed-by: Sonny Rao <[email protected]> Acked-by: Alan Stern <[email protected]> Tested-by: Doug Anderson <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
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