| From 6490865c67825277b29638e839850882600b48ec Mon Sep 17 00:00:00 2001 |
| From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> |
| Date: Thu, 10 Mar 2016 11:30:15 +0900 |
| Subject: usb: renesas_usbhs: disable TX IRQ before starting TX DMAC transfer |
| |
| From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> |
| |
| commit 6490865c67825277b29638e839850882600b48ec upstream. |
| |
| This patch adds a code to surely disable TX IRQ of the pipe before |
| starting TX DMAC transfer. Otherwise, a lot of unnecessary TX IRQs |
| may happen in rare cases when DMAC is used. |
| |
| Fixes: e73a989 ("usb: renesas_usbhs: add DMAEngine support") |
| Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> |
| Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| drivers/usb/renesas_usbhs/fifo.c | 1 + |
| 1 file changed, 1 insertion(+) |
| |
| --- a/drivers/usb/renesas_usbhs/fifo.c |
| +++ b/drivers/usb/renesas_usbhs/fifo.c |
| @@ -890,6 +890,7 @@ static int usbhsf_dma_prepare_push(struc |
| |
| pkt->trans = len; |
| |
| + usbhsf_tx_irq_ctrl(pipe, 0); |
| INIT_WORK(&pkt->work, xfer_work); |
| schedule_work(&pkt->work); |
| |
