1 files changed, 9 insertions, 2 deletions

diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
index 9e65c47cc98b..4d5bcb4e14d2 100644
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -41,6 +41,7 @@
 #include <linux/errno.h>
 #include <linux/init.h>
 #include <linux/list.h>
+#include <linux/dma-mapping.h>
 
 #include "musb_core.h"
 #include "musb_host.h"
@@ -1119,6 +1120,7 @@ void musb_host_tx(struct musb *musb, u8 epnum)
 	u32			status = 0;
 	void __iomem		*mbase = musb->mregs;
 	struct dma_channel	*dma;
+	bool			transfer_pending = false;
 
 	musb_ep_select(mbase, epnum);
 	tx_csr = musb_readw(epio, MUSB_TXCSR);
@@ -1279,7 +1281,7 @@ void musb_host_tx(struct musb *musb, u8 epnum)
 				offset = d->offset;
 				length = d->length;
 			}
-		} else if (dma) {
+		} else if (dma && urb->transfer_buffer_length == qh->offset) {
 			done = true;
 		} else {
 			/* see if we need to send more data, or ZLP */
@@ -1292,6 +1294,7 @@ void musb_host_tx(struct musb *musb, u8 epnum)
 			if (!done) {
 				offset = qh->offset;
 				length = urb->transfer_buffer_length - offset;
+				transfer_pending = true;
 			}
 		}
 	}
@@ -1311,7 +1314,7 @@ void musb_host_tx(struct musb *musb, u8 epnum)
 		urb->actual_length = qh->offset;
 		musb_advance_schedule(musb, urb, hw_ep, USB_DIR_OUT);
 		return;
-	} else	if (usb_pipeisoc(pipe) && dma) {
+	} else if ((usb_pipeisoc(pipe) || transfer_pending) && dma) {
 		if (musb_tx_dma_program(musb->dma_controller, hw_ep, qh, urb,
 				offset, length)) {
 			if (is_cppi_enabled() || tusb_dma_omap())
@@ -1332,6 +1335,8 @@ void musb_host_tx(struct musb *musb, u8 epnum)
 	 */
 	if (length > qh->maxpacket)
 		length = qh->maxpacket;
+	/* Unmap the buffer so that CPU can use it */
+	unmap_urb_for_dma(musb_to_hcd(musb), urb);
 	musb_write_fifo(hw_ep, length, urb->transfer_buffer + offset);
 	qh->segsize = length;
 
@@ -1752,6 +1757,8 @@ void musb_host_rx(struct musb *musb, u8 epnum)
 #endif	/* Mentor DMA */
 
 		if (!dma) {
+			/* Unmap the buffer so that CPU can use it */
+			unmap_urb_for_dma(musb_to_hcd(musb), urb);
 			done = musb_host_packet_rx(musb, urb,
 					epnum, iso_err);
 			DBG(6, "read %spacket\n", done ? "last " : "");