UPSTREAM: usb: dwc2: Fix probe problem on bcm2835

Fixes an issue found on Raspberry PI platform that prevents probe. Don't
skip setting the force mode if it's already set.

Change-Id: I8fcef478dd4ad669cb3fc49d2308d126873213c7
Fixes: 09c96980dc72 ("usb: dwc2: Add functions to set and clear force mode")
Tested-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Reported-by: Stefan Wahren <stefan.wahren@i2se.com>
Reported-by: Remi Pommarel <repk@triplefau.lt>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Tested-by: Remi Pommarel <repk@triplefau.lt>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Huang, Tao <huangtao@rock-chips.com>
(cherry picked from commit 192cb07f7928e8cb09a9851e6c0f7478baa3bc6d)

diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c
index 1489d315f287cfe3b426cb1e73f6d384f0978f2f..e991d55914db649804a6357821f42e78355e6e5b 100644 (file)
--- a/drivers/usb/dwc2/core.c
+++ b/drivers/usb/dwc2/core.c
@@ -572,12 +572,6 @@ static bool dwc2_force_mode(struct dwc2_hsotg *hsotg, bool host)
        set = host ? GUSBCFG_FORCEHOSTMODE : GUSBCFG_FORCEDEVMODE;
        clear = host ? GUSBCFG_FORCEDEVMODE : GUSBCFG_FORCEHOSTMODE;
 
-       /*
-        * If the force mode bit is already set, don't set it.
-        */
-       if ((gusbcfg & set) && !(gusbcfg & clear))
-               return false;
-
        gusbcfg &= ~clear;
        gusbcfg |= set;
        dwc2_writel(gusbcfg, hsotg->regs + GUSBCFG);