From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:56490 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754564AbbKFG1U (ORCPT ); Fri, 6 Nov 2015 01:27:20 -0500 Subject: Patch "Revert "serial: 8250_dma: don't bother DMA with small transfers"" has been added to the 4.1-stable tree To: frederic.danis@linux.intel.com, andriy.shevchenko@linux.intel.com, gregkh@linuxfoundation.org, heikki.krogerus@linux.intel.com Cc: , From: Date: Thu, 05 Nov 2015 22:27:18 -0800 Message-ID: <144679123838228@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 Revert "serial: 8250_dma: don't bother DMA with small transfers" to the 4.1-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: revert-serial-8250_dma-don-t-bother-dma-with-small-transfers.patch and it can be found in the queue-4.1 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From f967fc8f165fadb72166f2bd4785094b3ca21307 Mon Sep 17 00:00:00 2001 From: Frederic Danis Date: Fri, 9 Oct 2015 17:14:56 +0200 Subject: Revert "serial: 8250_dma: don't bother DMA with small transfers" From: Frederic Danis commit f967fc8f165fadb72166f2bd4785094b3ca21307 upstream. This reverts commit 9119fba0cfeda6d415c9f068df66838a104b87cb. This commit prevents from sending "big" file using Bluetooth. When sending a lot of data quickly through the Bluetooth interface, and after a variable amount of data sent, transfer fails with error: kernel: [ 415.247453] Bluetooth: hci0 hardware error 0x00 Found on T100TA. After reverting this commit, send works fine for any file size. Signed-off-by: Frederic Danis Fixes: 9119fba0cfed (serial: 8250_dma: don't bother DMA with small transfers) Reviewed-by: Heikki Krogerus Acked-by: Andy Shevchenko Signed-off-by: Greg Kroah-Hartman Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_dma.c | 4 ---- 1 file changed, 4 deletions(-) --- a/drivers/tty/serial/8250/8250_dma.c +++ b/drivers/tty/serial/8250/8250_dma.c @@ -80,10 +80,6 @@ int serial8250_tx_dma(struct uart_8250_p return 0; dma->tx_size = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE); - if (dma->tx_size < p->port.fifosize) { - ret = -EINVAL; - goto err; - } desc = dmaengine_prep_slave_single(dma->txchan, dma->tx_addr + xmit->tail, Patches currently in stable-queue which might be from frederic.danis@linux.intel.com are queue-4.1/revert-serial-8250_dma-don-t-bother-dma-with-small-transfers.patch