[U-Boot] [PATCH] usb: xhci-rcar: deregister before deactivating clock

[Matthias Blankertz]

During the execution of xhci_deregister xHCI registers are accessed. If
the clock is already deactivated when xhci_deregister is called this can
lead to undefined behavior. Change the order to deregister the device
before deactivating the clock.

Signed-off-by: Matthias Blankertz <matthias.blankertz at cetitec.com>
---
 drivers/usb/host/xhci-rcar.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/host/xhci-rcar.c b/drivers/usb/host/xhci-rcar.c
index a837afc483b..f2e91ef0feb 100644
--- a/drivers/usb/host/xhci-rcar.c
+++ b/drivers/usb/host/xhci-rcar.c
@@ -117,12 +117,15 @@ err_clk:
 
 static int xhci_rcar_deregister(struct udevice *dev)
 {
+       int ret;
        struct rcar_xhci_platdata *plat = dev_get_platdata(dev);
 
+       ret = xhci_deregister(dev);
+
        clk_disable(&plat->clk);
        clk_free(&plat->clk);
 
-       return xhci_deregister(dev);
+       return ret;
 }
 
 static int xhci_rcar_ofdata_to_platdata(struct udevice *dev)
-- 
2.17.0


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