[PATCHv3] usb: dwc3: use a burst size only ss-mode

[Chanho Park <chanho61.park@xxxxxxxxxxx>]

When connection is established non-ss mode, a maxburst is set to 0.
Therefore, the value of burst size has wrong value. We must use the burst size
only in ss-mode.

Signed-off-by: Chanho Park <chanho61.park@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
 drivers/usb/dwc3/gadget.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 58fdfad..440a86b 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -434,12 +434,16 @@ static int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep,
 		const struct usb_ss_ep_comp_descriptor *comp_desc)
 {
 	struct dwc3_gadget_ep_cmd_params params;
+	u32 burst_size;
 
 	memset(&params, 0x00, sizeof(params));
 
+	/* We only use a burst size in ss-mode */
+	burst_size = (com_desc) ? (dep->endpoint.maxburst - 1) : 0;
+
 	params.param0 = DWC3_DEPCFG_EP_TYPE(usb_endpoint_type(desc))
 		| DWC3_DEPCFG_MAX_PACKET_SIZE(usb_endpoint_maxp(desc))
-		| DWC3_DEPCFG_BURST_SIZE(dep->endpoint.maxburst - 1);
+		| DWC3_DEPCFG_BURST_SIZE(burst_size);
 
 	params.param1 = DWC3_DEPCFG_XFER_COMPLETE_EN
 		| DWC3_DEPCFG_XFER_NOT_READY_EN;
-- 
1.7.9.5

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