From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:34010 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751788AbdJOO3S (ORCPT ); Sun, 15 Oct 2017 10:29:18 -0400 Subject: Patch "usb: renesas_usbhs: Fix DMAC sequence for receiving zero-length packet" has been added to the 3.18-stable tree To: kazuya.mizuguchi.ks@renesas.com, felipe.balbi@linux.intel.com, gregkh@linuxfoundation.org, yoshihiro.shimoda.uh@renesas.com Cc: , From: Date: Sun, 15 Oct 2017 16:29:06 +0200 Message-ID: <150807774611261@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled usb: renesas_usbhs: Fix DMAC sequence for receiving zero-length packet to the 3.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: usb-renesas_usbhs-fix-dmac-sequence-for-receiving-zero-length-packet.patch and it can be found in the queue-3.18 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 29c7f3e68eec4ae94d85ad7b5dfdafdb8089f513 Mon Sep 17 00:00:00 2001 From: Kazuya Mizuguchi Date: Mon, 2 Oct 2017 14:01:41 +0900 Subject: usb: renesas_usbhs: Fix DMAC sequence for receiving zero-length packet From: Kazuya Mizuguchi commit 29c7f3e68eec4ae94d85ad7b5dfdafdb8089f513 upstream. The DREQE bit of the DnFIFOSEL should be set to 1 after the DE bit of USB-DMAC on R-Car SoCs is set to 1 after the USB-DMAC received a zero-length packet. Otherwise, a transfer completion interruption of USB-DMAC doesn't happen. Even if the driver changes the sequence, normal operations (transmit/receive without zero-length packet) will not cause any side-effects. So, this patch fixes the sequence anyway. Signed-off-by: Kazuya Mizuguchi [shimoda: revise the commit log] Fixes: e73a9891b3a1 ("usb: renesas_usbhs: add DMAEngine support") Signed-off-by: Yoshihiro Shimoda Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/usb/renesas_usbhs/fifo.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/usb/renesas_usbhs/fifo.c +++ b/drivers/usb/renesas_usbhs/fifo.c @@ -880,9 +880,9 @@ static void xfer_work(struct work_struct fifo->name, usbhs_pipe_number(pipe), pkt->length, pkt->zero); usbhs_pipe_running(pipe, 1); - usbhsf_dma_start(pipe, fifo); usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->trans); dma_async_issue_pending(chan); + usbhsf_dma_start(pipe, fifo); usbhs_pipe_enable(pipe); xfer_work_end: Patches currently in stable-queue which might be from kazuya.mizuguchi.ks@renesas.com are queue-3.18/usb-renesas_usbhs-fix-dmac-sequence-for-receiving-zero-length-packet.patch