Merge branch 'for-rmk' of git://git.pengutronix.de/git/imx/linux-2.6

[cascardo/linux.git] / drivers / usb / musb / musb_host.c

diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
index 877d20b..9e65c47 100644 (file)
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -660,6 +660,12 @@ static bool musb_tx_dma_program(struct dma_controller *dma,
 
        qh->segsize = length;
 
+       /*
+        * Ensure the data reaches to main memory before starting
+        * DMA transfer
+        */
+       wmb();
+
        if (!dma->channel_program(channel, pkt_size, mode,
                        urb->transfer_dma + offset, length)) {
                dma->channel_release(channel);