renesas_usbhs can't handle scatter/gather type DMA.
Thus, return -EINVAL is better than WARNING() on mod_gadget
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
---
drivers/usb/renesas_usbhs/mod_gadget.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/renesas_usbhs/mod_gadget.c b/drivers/usb/renesas_usbhs/mod_gadget.c
index 28478ce..40256bf 100644
--- a/drivers/usb/renesas_usbhs/mod_gadget.c
+++ b/drivers/usb/renesas_usbhs/mod_gadget.c
@@ -180,7 +180,8 @@ static int usbhsg_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
if (map) {
/* it can not use scatter/gather */
- WARN_ON(req->num_sgs);
+ if (req->num_sgs)
+ return -EINVAL;
ret = usb_gadget_map_request(&gpriv->gadget, req, dir);
if (ret < 0)
--
1.7.9.5
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