From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753019AbcFEKXl (ORCPT ); Sun, 5 Jun 2016 06:23:41 -0400 Received: from wtarreau.pck.nerim.net ([62.212.114.60]:22006 "EHLO 1wt.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752926AbcFEKX2 (ORCPT ); Sun, 5 Jun 2016 06:23:28 -0400 From: Willy Tarreau To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Yoshihiro Shimoda , stable@vger.kernel.org#v3.1+, Felipe Balbi , Willy Tarreau Subject: [PATCH 3.10 076/143] usb: renesas_usbhs: disable TX IRQ before starting TX DMAC transfer Date: Sun, 5 Jun 2016 12:19:39 +0200 Message-Id: <1465122046-9645-77-git-send-email-w@1wt.eu> X-Mailer: git-send-email 2.8.0.rc2.1.gbe9624a In-Reply-To: <1465122046-9645-1-git-send-email-w@1wt.eu> References: <1465122046-9645-1-git-send-email-w@1wt.eu> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Yoshihiro Shimoda 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") Cc: # v3.1+ Signed-off-by: Yoshihiro Shimoda Signed-off-by: Felipe Balbi Signed-off-by: Willy Tarreau --- 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 540e688..157a9f9 100644 --- a/drivers/usb/renesas_usbhs/fifo.c +++ b/drivers/usb/renesas_usbhs/fifo.c @@ -934,6 +934,7 @@ static int usbhsf_dma_try_pop(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); -- 2.8.0.rc2.1.gbe9624a