usb: host: ehci-tegra: Correct teardown order of driver's removal
authorDmitry Osipenko <digetx@gmail.com>
Mon, 6 Jan 2020 01:33:58 +0000 (04:33 +0300)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 9 Jan 2020 10:15:31 +0000 (11:15 +0100)
commit62a7f62891247e83b6a17cedae8f8ae15cff2c5e
tree0d3a8155a79363513b9b3c69a5560f82be30fb33
parent0bb207acd37bd087d8eb424aacb23fb1ecdc232b
usb: host: ehci-tegra: Correct teardown order of driver's removal

I found that PHY's enable refcounting was broken and after fixing it
I also found that machine started to hang after EHCI driver module
removal. Turned out that the teardown order is incorrect because HCD must
be unregistered *before* PHY's disabling. Note that it is also not correct
to assert the shared reset during of driver's removal because PHY takes
care of resetting shared pads and thus it's better to remove that part
from the EHCI driver.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20200106013416.9604-3-digetx@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/host/ehci-tegra.c