From patchwork Tue Feb 26 06:47:59 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wenyou Yang X-Patchwork-Id: 2184471 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork2.kernel.org (Postfix) with ESMTP id 89BC9DF215 for ; Tue, 26 Feb 2013 06:58:19 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1UAESC-0000IU-9W; Tue, 26 Feb 2013 06:55:56 +0000 Received: from nasmtp01.atmel.com ([192.199.1.245] helo=DVREDG01.corp.atmel.com) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1UAES8-0000Gu-SR for linux-arm-kernel@lists.infradead.org; Tue, 26 Feb 2013 06:55:53 +0000 Received: from apsmtp01.atmel.com (10.168.254.30) by DVREDG01.corp.atmel.com (10.42.103.30) with Microsoft SMTP Server (TLS) id 14.2.318.1; Mon, 25 Feb 2013 23:55:48 -0700 Received: from shaarm01.corp.atmel.com (10.168.254.13) by apsmtp01.corp.atmel.com (10.168.254.30) with Microsoft SMTP Server id 14.2.318.1; Tue, 26 Feb 2013 14:58:24 +0800 From: Wenyou Yang To: Subject: [PATCH v5 06/16] spi/spi-atmel: status information passed through controller data Date: Tue, 26 Feb 2013 14:47:59 +0800 Message-ID: <1361861289-30332-7-git-send-email-wenyou.yang@atmel.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1361861289-30332-1-git-send-email-wenyou.yang@atmel.com> References: <1361861289-30332-1-git-send-email-wenyou.yang@atmel.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130226_015553_072515_2D84D3EA X-CRM114-Status: GOOD ( 11.37 ) X-Spam-Score: -2.6 (--) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-2.6 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 SPF_PASS SPF: sender matches SPF record -0.7 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: richard.genoud@gmail.com, JM.Lin@atmel.com, nicolas.ferre@atmel.com, linux-kernel@vger.kernel.org, wenyou.yang@atmel.com, grant.likely@secretlab.ca, spi-devel-general@lists.sourceforge.net, plagnioj@jcrosoft.com X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org From: Nicolas Ferre The status of transfer is stored in controller data structure so that it can be used not only by atmel_spi_msg_done() function. This will be useful for upcoming dmaengine enabled driver. Signed-off-by: Nicolas Ferre Cc: spi-devel-general@lists.sourceforge.net Cc: linux-kernel@vger.kernel.org [wenyou.yang@atmel.com: submit the patch] Signed-off-by: Wenyou Yang --- drivers/spi/spi-atmel.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c index 6ea41a7..136ed8f 100644 --- a/drivers/spi/spi-atmel.c +++ b/drivers/spi/spi-atmel.c @@ -210,6 +210,7 @@ struct atmel_spi { unsigned long current_remaining_bytes; struct spi_transfer *next_transfer; unsigned long next_remaining_bytes; + int done_status; void *buffer; dma_addr_t buffer_dma; @@ -555,15 +556,15 @@ static void atmel_spi_dma_unmap_xfer(struct spi_master *master, static void atmel_spi_msg_done(struct spi_master *master, struct atmel_spi *as, - struct spi_message *msg, int status, int stay) + struct spi_message *msg, int stay) { - if (!stay || status < 0) + if (!stay || as->done_status < 0) cs_deactivate(as, msg->spi); else as->stay = msg->spi; list_del(&msg->queue); - msg->status = status; + msg->status = as->done_status; dev_dbg(master->dev.parent, "xfer complete: %u bytes transferred\n", @@ -575,6 +576,7 @@ atmel_spi_msg_done(struct spi_master *master, struct atmel_spi *as, as->current_transfer = NULL; as->next_transfer = NULL; + as->done_status = 0; /* continue if needed */ if (list_empty(&as->queue) || as->stopping) @@ -652,7 +654,8 @@ atmel_spi_interrupt(int irq, void *dev_id) /* Clear any overrun happening while cleaning up */ spi_readl(as, SR); - atmel_spi_msg_done(master, as, msg, -EIO, 0); + as->done_status = -EIO; + atmel_spi_msg_done(master, as, msg, 0); } else if (pending & (SPI_BIT(RXBUFF) | SPI_BIT(ENDRX))) { ret = IRQ_HANDLED; @@ -670,7 +673,7 @@ atmel_spi_interrupt(int irq, void *dev_id) if (atmel_spi_xfer_is_last(msg, xfer)) { /* report completed message */ - atmel_spi_msg_done(master, as, msg, 0, + atmel_spi_msg_done(master, as, msg, xfer->cs_change); } else { if (xfer->cs_change) {