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

commit 891b1dc022955d36cf4c0f42d383226a930db7ed upstream.

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: b09bb64239c8 (usb: dwc3: gadget: implement Global Command support)
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 8946c32047e996308e3a752c8dd0ce7f501c3909..fcbe120ba8ce9f9751bacf7aba86689288f84213 100644 (file)
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -291,6 +291,8 @@ int dwc3_send_gadget_generic_command(struct dwc3 *dwc, unsigned cmd, u32 param)
                        dwc3_trace(trace_dwc3_gadget,
                                        "Command Complete --> %d",
                                        DWC3_DGCMD_STATUS(reg));
+                       if (DWC3_DGCMD_STATUS(reg))
+                               return -EINVAL;
                        return 0;
                }