musb_gadget: suppress "parasitic" TX interrupts with CPPI

Suppress "parasitic" endpoint interrupts in the DMA mode
when using CPPI DMA driver; they're caused by the MUSB gadget
driver using the DMA request mode 0 instead of the mode 1.

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
index f79440cdfe7ee2e346ae59cd2e164618c7d2a3f7..bc197b28ac4096b59102fb3af2d17b535523eb19 100644 (file)
--- a/drivers/usb/musb/musb_gadget.c
+++ b/drivers/usb/musb/musb_gadget.c
@@ -349,7 +349,8 @@ static void txstate(struct musb *musb, struct musb_request *req)
 #elif defined(CONFIG_USB_TI_CPPI_DMA)
                /* program endpoint CSR first, then setup DMA */
                csr &= ~(MUSB_TXCSR_P_UNDERRUN | MUSB_TXCSR_TXPKTRDY);
-               csr |= MUSB_TXCSR_MODE | MUSB_TXCSR_DMAENAB;
+               csr |= MUSB_TXCSR_DMAENAB | MUSB_TXCSR_DMAMODE |
+                      MUSB_TXCSR_MODE;
                musb_writew(epio, MUSB_TXCSR,
                        (MUSB_TXCSR_P_WZC_BITS & ~MUSB_TXCSR_P_UNDERRUN)
                                | csr);