From 12ecd2fa1d46fd8025a51d3a02d23766a9241117 Mon Sep 17 00:00:00 2001 From: Yoshihiro Shimoda Date: Thu, 10 Mar 2016 11:30:15 +0900 Subject: [PATCH] usb: renesas_usbhs: disable TX IRQ before starting TX DMAC transfer 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 Signed-off-by: Felipe Balbi [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings --- drivers/usb/renesas_usbhs/fifo.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/usb/renesas_usbhs/fifo.c b/drivers/usb/renesas_usbhs/fifo.c index 60b274abe836..6fb551476cca 100644 --- a/drivers/usb/renesas_usbhs/fifo.c +++ b/drivers/usb/renesas_usbhs/fifo.c @@ -932,6 +932,7 @@ static int usbhsf_dma_try_pop(struct usbhs_pkt *pkt, int *is_done) pkt->trans = len; + usbhsf_tx_irq_ctrl(pipe, 0); tasklet_init(&fifo->tasklet, usbhsf_dma_prepare_tasklet, (unsigned long)pkt); -- 2.39.5