usb: dwc2: gadget: reset fifo_map when initializing fifos

After all endpoints are disabled, fifo_map should have reached 0.
Its a bug if if didn't, so warn about it and reset it to 0 so that
driver can continue using all the fifos.

Tested-by: Robert Baldyga <r.baldyga@samsung.com>
Acked-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index de5da92a8537387593de358b79d15945a655f933..a1fd86febe98e67147b1edd8a317064598da782c 100644 (file)
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -177,6 +177,10 @@ static void s3c_hsotg_init_fifo(struct dwc2_hsotg *hsotg)
        int timeout;
        u32 val;
 
+       /* Reset fifo map if not correctly cleared during previous session */
+       WARN_ON(hsotg->fifo_map);
+       hsotg->fifo_map = 0;
+
        /* set RX/NPTX FIFO sizes */
        writel(hsotg->g_rx_fifo_sz, hsotg->regs + GRXFSIZ);
        writel((hsotg->g_rx_fifo_sz << FIFOSIZE_STARTADDR_SHIFT) |