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>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/usb/renesas_usbhs/pipe.c b/drivers/usb/renesas_usbhs/pipe.c
index 4852c073e2f5..5897ddad05f2 100644
--- 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);