From 5c059995372c2861bb71cd761fc50cf773015d14 Mon Sep 17 00:00:00 2001 From: Yoshihiro Shimoda Date: Thu, 10 Mar 2016 11:30:15 +0900 Subject: usb: renesas_usbhs: disable TX IRQ before starting TX DMAC transfer [ Upstream commit 6490865c67825277b29638e839850882600b48ec ] 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") Cc: # v3.1+ Signed-off-by: Yoshihiro Shimoda Signed-off-by: Felipe Balbi Signed-off-by: Sasha Levin --- drivers/usb/renesas_usbhs/fifo.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/usb') diff --git a/drivers/usb/renesas_usbhs/fifo.c b/drivers/usb/renesas_usbhs/fifo.c index 32df73820726..f1893e08e51a 100644 --- a/drivers/usb/renesas_usbhs/fifo.c +++ b/drivers/usb/renesas_usbhs/fifo.c @@ -890,6 +890,7 @@ static int usbhsf_dma_prepare_push(struct usbhs_pkt *pkt, int *is_done) pkt->trans = len; + usbhsf_tx_irq_ctrl(pipe, 0); INIT_WORK(&pkt->work, xfer_work); schedule_work(&pkt->work); -- cgit v1.2.3