For high-speed transfers the __dwc3_prepare_one_trb function is
calculating the multiplier setting for the trb based on the length of
the trb currently prepared. This assumption is wrong. For trbs with a
sglist the length of the actual request has to be taken instead.
Signed-off-by: Michael Grzeschik <m.grzeschik@xxxxxxxxxxxxxx>
---
drivers/usb/dwc3/gadget.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 8716bece107208..0fc3ecfaa48baf 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1186,7 +1186,7 @@ static void __dwc3_prepare_one_trb(struct dwc3_ep *dep, struct dwc3_trb *trb,
dma_addr_t dma, unsigned int length, unsigned int chain,
unsigned int node, unsigned int stream_id,
unsigned int short_not_ok, unsigned int no_interrupt,
- unsigned int is_last, bool must_interrupt)
+ unsigned int is_last, bool must_interrupt, int req_length)
{
struct dwc3 *dwc = dep->dwc;
struct usb_gadget *gadget = dwc->gadget;
@@ -1232,10 +1232,10 @@ static void __dwc3_prepare_one_trb(struct dwc3_ep *dep, struct dwc3_trb *trb,
unsigned int mult = 2;
unsigned int maxp = usb_endpoint_maxp(ep->desc);
- if (length <= (2 * maxp))
+ if (req_length <= (2 * maxp))
mult--;
- if (length <= maxp)
+ if (req_length <= maxp)
mult--;
trb->size |= DWC3_TRB_SIZE_PCM1(mult);
@@ -1350,7 +1350,7 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep,
__dwc3_prepare_one_trb(dep, trb, dma, trb_length, chain, node,
stream_id, short_not_ok, no_interrupt, is_last,
- must_interrupt);
+ must_interrupt, req->request.length);
}
static bool dwc3_needs_extra_trb(struct dwc3_ep *dep, struct dwc3_request *req)
--
2.30.2
