The check against MAX_DMA_DESC_SIZE didn't make sense, fix it

Reported-by: Dan Carpenter <dan.carpen...@oracle.com>
Signed-off-by: Paul Zimmerman <pa...@synopsys.com>
---
 drivers/staging/dwc2/hcd_ddma.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/dwc2/hcd_ddma.c b/drivers/staging/dwc2/hcd_ddma.c
index 72e9788..3376177 100644
--- a/drivers/staging/dwc2/hcd_ddma.c
+++ b/drivers/staging/dwc2/hcd_ddma.c
@@ -621,8 +621,8 @@ static void dwc2_fill_host_dma_desc(struct dwc2_hsotg 
*hsotg,
        struct dwc2_hcd_dma_desc *dma_desc = &qh->desc_list[n_desc];
        int len = chan->xfer_len;
 
-       if (len > MAX_DMA_DESC_SIZE)
-               len = MAX_DMA_DESC_SIZE - chan->max_packet + 1;
+       if (len > MAX_DMA_DESC_SIZE - (chan->max_packet - 1))
+               len = MAX_DMA_DESC_SIZE - (chan->max_packet - 1);
 
        if (chan->ep_is_in) {
                int num_packets;
-- 
1.8.5.rc3

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