phy: sun4i: check PMU presence when poking unknown bit of pmu
authorIcenowy Zheng <icenowy@aosc.xyz>
Fri, 28 Oct 2016 16:27:01 +0000 (00:27 +0800)
committerKishon Vijay Abraham I <kishon@ti.com>
Sat, 5 Nov 2016 08:15:02 +0000 (13:45 +0530)
commit4320f9d4c1831fd4d244a9de8f81bc27ea67699c
tree0ee4d75e4ca929aa749e7a216702576a4cebccbe
parent232c260982ab0100cbb29055933e45b928252687
phy: sun4i: check PMU presence when poking unknown bit of pmu

Allwinner SoC's PHY 0, when used as OTG controller, have no pmu part.
The code that poke some unknown bit of PMU for H3/A64 didn't check
the PHY, and will cause kernel oops when PHY 0 is used.

This patch will check whether the pmu is not NULL before poking.

Fixes: b3e0d141ca9f (phy: sun4i: add support for A64 usb phy)

Signed-off-by: Icenowy Zheng <icenowy@aosc.xyz>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
drivers/phy/phy-sun4i-usb.c