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Diffstat (limited to 'drivers/usb/musb/musb_host.c')
| -rw-r--r-- | drivers/usb/musb/musb_host.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c index 877d20b..9e65c47 100644 --- 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); |