usb: musb: host: remove duplicate check in musb_ep_program()

musb_ep_program() contains obviously duplicate check for 'dma_channel' in its
IN/receive path -- removing it allows to save one level of indentation. While
at it, improve the comment style...

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 22 insertions, 27 deletions

diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
index 75aa01e0036..7295e316bdf 100644
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -837,33 +837,28 @@ static void musb_ep_program(struct musb *musb, u8 epnum,
                 /* kick things off */
 
                 if ((is_cppi_enabled() || tusb_dma_omap()) && dma_channel) {
-                        /* candidate for DMA */
-                        if (dma_channel) {
-                                dma_channel->actual_len = 0L;
-                                qh->segsize = len;
-
-                                /* AUTOREQ is in a DMA register */
-                                musb_writew(hw_ep->regs, MUSB_RXCSR, csr);
-                                csr = musb_readw(hw_ep->regs,
-                                                MUSB_RXCSR);
-
-                                /* unless caller treats short rx transfers as
-                                 * errors, we dare not queue multiple transfers.
-                                 */
-                                dma_ok = dma_controller->channel_program(
-                                                dma_channel, packet_sz,
-                                                !(urb->transfer_flags
-                                                        & URB_SHORT_NOT_OK),
-                                                urb->transfer_dma + offset,
-                                                qh->segsize);
-                                if (!dma_ok) {
-                                        dma_controller->channel_release(
-                                                        dma_channel);
-                                        hw_ep->rx_channel = NULL;
-                                        dma_channel = NULL;
-                                } else
-                                        csr |= MUSB_RXCSR_DMAENAB;
-                        }
+                        /* Candidate for DMA */
+                        dma_channel->actual_len = 0L;
+                        qh->segsize = len;
+
+                        /* AUTOREQ is in a DMA register */
+                        musb_writew(hw_ep->regs, MUSB_RXCSR, csr);
+                        csr = musb_readw(hw_ep->regs, MUSB_RXCSR);
+
+                        /*
+                         * Unless caller treats short RX transfers as
+                         * errors, we dare not queue multiple transfers.
+                         */
+                        dma_ok = dma_controller->channel_program(dma_channel,
+                                        packet_sz, !(urb->transfer_flags &
+                                                     URB_SHORT_NOT_OK),
+                                        urb->transfer_dma + offset,
+                                        qh->segsize);
+                        if (!dma_ok) {
+                                dma_controller->channel_release(dma_channel);
+                                hw_ep->rx_channel = dma_channel = NULL;
+                        } else
+                                csr |= MUSB_RXCSR_DMAENAB;
                 }
 
                 csr |= MUSB_RXCSR_H_REQPKT;