From: Vahram Aharonyan <vahr...@synopsys.com>
In DDMA mode if programmed ISOC OUT transfer length is not DWORD
aligned, after closing descriptor HW leaves value of 4 - (ureq->length %
4) in the RX bytes. This is caused because DMA works using 4B chunks.
Example: if length = 9 and all 9 bytes were received from the bus, after
xfercomplete rx_bytes value is 3. Hence add this value to the amount of
transferred bytes.
Signed-off-by: Vahram Aharonyan <vahr...@synopsys.com>
Signed-off-by: John Youn <johny...@synopsys.com>
---
drivers/usb/dwc2/gadget.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 9f28756..d2442f4 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -2001,6 +2001,10 @@ static void
dwc2_gadget_complete_isoc_request_ddma(struct dwc2_hsotg_ep *hs_ep)
ureq->actual = ureq->length -
((desc_sts & mask) >> DEV_DMA_ISOC_NBYTES_SHIFT);
+ /* Adjust actual length for ISOC Out if length is not align of 4 */
+ if (!hs_ep->dir_in && ureq->length & 0x3)
+ ureq->actual += 4 - (ureq->length & 0x3);
+
dwc2_hsotg_complete_request(hsotg, hs_ep, hs_req, 0);
}
--
2.10.0
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