usb: dwc3: gadget: increase tx fifo size for ss isoc endpoints

Improve performance of isoc transfers in superspeed by increasing the
number of possible endpoints available, matching that of what was
configured for bulk transfers.

Signed-off-by: Dan Vacura <w36195@motorola.com>
Link: https://lore.kernel.org/r/20220420183338.445622-1-w36195@motorola.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 66a256c475148c3b649cee7d83438366111ab2ae..c3d95f9b010b1c20c61d46299575fd514c24e87e 100644 (file)
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -782,7 +782,8 @@ static int dwc3_gadget_resize_tx_fifos(struct dwc3_ep *dep)
                num_fifos = 3;
 
        if (dep->endpoint.maxburst > 6 &&
-           usb_endpoint_xfer_bulk(dep->endpoint.desc) && DWC3_IP_IS(DWC31))
+           (usb_endpoint_xfer_bulk(dep->endpoint.desc) ||
+            usb_endpoint_xfer_isoc(dep->endpoint.desc)) && DWC3_IP_IS(DWC31))
                num_fifos = dwc->tx_fifo_resize_max_num;
 
        /* FIFO size for a single buffer */