usb: dwc3: gadget: return error if command sent to DEPCMD register fails

[ Upstream commit 76e838c9f7765f9a6205b4d558d75a66104bc60d ]

We need to return error to caller if command is not sent to
controller succesfully.

Signed-off-by: Subbaraya Sundeep Bhatta <sbhatta@xilinx.com>
Fixes: 72246da40f37 (usb: Introduce DesignWare USB3 DRD Driver)
Cc: <stable@vger.kernel.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index c0afd3fc520fd8ca729ca325673161bc871c2fa4..b66ee89fb7394444d758c434d14be3d03ed52e49 100644 (file)
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -324,6 +324,8 @@ int dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep,
                if (!(reg & DWC3_DEPCMD_CMDACT)) {
                        dev_vdbg(dwc->dev, "Command Complete --> %d\n",
                                        DWC3_DEPCMD_STATUS(reg));
+                       if (DWC3_DEPCMD_STATUS(reg))
+                               return -EINVAL;
                        return 0;
                }