Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752657AbcDVLQ0 (ORCPT ); Fri, 22 Apr 2016 07:16:26 -0400 Received: from mx2.suse.de ([195.135.220.15]:43950 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753617AbcDVLG1 (ORCPT ); Fri, 22 Apr 2016 07:06:27 -0400 X-Amavis-Alert: BAD HEADER SECTION, Duplicate header field: "References" From: Jiri Slaby To: stable@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Yoshihiro Shimoda , Felipe Balbi , Jiri Slaby Subject: [PATCH 3.12 50/78] usb: renesas_usbhs: disable TX IRQ before starting TX DMAC transfer Date: Fri, 22 Apr 2016 13:05:33 +0200 Message-Id: <070a20e7d682b49b8dac8b482d7a249d0db506d0.1461323133.git.jslaby@suse.cz> X-Mailer: git-send-email 2.8.1 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1119 Lines: 34 From: Yoshihiro Shimoda 3.12-stable review patch. If anyone has any objections, please let me know. =============== 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 Signed-off-by: Jiri Slaby --- 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 1550c103f8a3..13170ed3c392 100644 --- a/drivers/usb/renesas_usbhs/fifo.c +++ b/drivers/usb/renesas_usbhs/fifo.c @@ -946,6 +946,7 @@ 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); -- 2.8.1