From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756385AbZDFPgY (ORCPT ); Mon, 6 Apr 2009 11:36:24 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756321AbZDFPeL (ORCPT ); Mon, 6 Apr 2009 11:34:11 -0400 Received: from earthlight.etchedpixels.co.uk ([81.2.110.250]:56967 "EHLO t61.ukuu.org.uk" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1755476AbZDFPeK (ORCPT ); Mon, 6 Apr 2009 11:34:10 -0400 From: Alan Cox Subject: [PATCH 08/27] Fix DMA rx ring buffer handling To: torvalds@linux-foundation.org, linux-kernel@vger.kernel.org Date: Mon, 06 Apr 2009 17:32:42 +0100 Message-ID: <20090406163240.12934.91456.stgit@t61.ukuu.org.uk> In-Reply-To: <20090406162959.12934.97904.stgit@t61.ukuu.org.uk> References: <20090406162959.12934.97904.stgit@t61.ukuu.org.uk> User-Agent: StGIT/0.14.3 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Sonic Zhang Reported-by: Qian Zhang Signed-off-by: Sonic Zhang Signed-off-by: Bryan Wu Signed-off-by: Alan Cox --- drivers/serial/bfin_5xx.c | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-) diff --git a/drivers/serial/bfin_5xx.c b/drivers/serial/bfin_5xx.c index d7b2716..12b11da 100644 --- a/drivers/serial/bfin_5xx.c +++ b/drivers/serial/bfin_5xx.c @@ -401,9 +401,11 @@ static void bfin_serial_dma_rx_chars(struct bfin_serial_port *uart) else flg = TTY_NORMAL; - for (i = uart->rx_dma_buf.tail; i != uart->rx_dma_buf.head; i++) { + for (i = uart->rx_dma_buf.tail; ; i++) { if (i >= UART_XMIT_SIZE) i = 0; + if (i == uart->rx_dma_buf.head) + break; if (!uart_handle_sysrq_char(&uart->port, uart->rx_dma_buf.buf[i])) uart_insert_char(&uart->port, status, OE, uart->rx_dma_buf.buf[i], flg);