usb: dwc2: host: ensure filling of isoc desc is correctly done

Increment qtd->isoc_frame_index_last before testing it, else below
check will never be true and IOC (Interrupt On Complete) bit for
last frame will never be set in descriptor status.

  /* Set IOC for each descriptor corresponding to last frame of URB */
  if (qtd->isoc_frame_index_last == qtd->urb->packet_count)
	dma_desc->status |= HOST_DMA_IOC;

Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/dwc2/hcd_ddma.c b/drivers/usb/dwc2/hcd_ddma.c
index 78993ab..4b0be93 100644 (file)
--- a/drivers/usb/dwc2/hcd_ddma.c
+++ b/drivers/usb/dwc2/hcd_ddma.c
@@ -524,14 +524,15 @@ static void dwc2_fill_host_isoc_dma_desc(struct dwc2_hsotg *hsotg,
        dma_desc->status = qh->n_bytes[idx] << HOST_DMA_ISOC_NBYTES_SHIFT &
                           HOST_DMA_ISOC_NBYTES_MASK;
 
+       qh->ntd++;
+       qtd->isoc_frame_index_last++;
+
 #ifdef ISOC_URB_GIVEBACK_ASAP
        /* Set IOC for each descriptor corresponding to last frame of URB */
        if (qtd->isoc_frame_index_last == qtd->urb->packet_count)
                dma_desc->status |= HOST_DMA_IOC;
 #endif
 
-       qh->ntd++;
-       qtd->isoc_frame_index_last++;
 }
 
 static void dwc2_init_isoc_dma_desc(struct dwc2_hsotg *hsotg,