usb: renesas_usbhs: add error reason for usbhs_pipe_malloc

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/renesas_usbhs/pipe.c b/drivers/usb/renesas_usbhs/pipe.c
index 4852c07..5897dda 100644 (file)
--- a/drivers/usb/renesas_usbhs/pipe.c
+++ b/drivers/usb/renesas_usbhs/pipe.c
@@ -758,8 +758,11 @@ struct usbhs_pipe *usbhs_pipe_malloc(struct usbhs_priv *priv,
        u16 pipecfg, pipebuf, pipemaxp;
 
        pipe = usbhsp_get_pipe(priv, usb_endpoint_type(desc));
-       if (!pipe)
+       if (!pipe) {
+               dev_err(dev, "can't get pipe (%s)\n",
+                       usbhsp_pipe_name[usb_endpoint_type(desc)]);
                return NULL;
+       }
 
        usbhs_fifo_disable(pipe);