linux-kernel - [PATCH v3 6/7] spi: imx: return error from dma channel request

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1446388901-6073-7-git-send-email-anton.bondarenko.sama@gmail.com>
Date:	Sun,  1 Nov 2015 15:41:40 +0100
From:	Anton Bondarenko <anton.bondarenko.sama@...il.com>
To:	broonie@...nel.org, b38343@...escale.com
Cc:	linux-kernel@...r.kernel.org, linux-spi@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	vladimir_zapolskiy@...tor.com, jiada_wang@...tor.com,
	s.hauer@...gutronix.de
Subject: [PATCH v3 6/7] spi: imx: return error from dma channel request

From: Anton Bondarenko <anton_bondarenko@...tor.com>

On SDMA initialization return exactly the same error, which is
reported by dma_request_slave_channel_reason(), it is a preceding
change to defer SPI DMA initialization, if SDMA module is not yet
available.

Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@...tor.com>
Signed-off-by: Anton Bondarenko <anton_bondarenko@...tor.com>
---
 drivers/spi/spi-imx.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index dc492e2..6035ddd 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -923,18 +923,20 @@ static int spi_imx_sdma_init(struct device *dev, struct spi_imx_data *spi_imx,
 	spi_imx->wml = spi_imx_get_fifosize(spi_imx) / 2;
 
 	/* Prepare for TX DMA: */
-	master->dma_tx = dma_request_slave_channel(dev, "tx");
-	if (!master->dma_tx) {
-		dev_err(dev, "cannot get the TX DMA channel!\n");
-		ret = -EINVAL;
+	master->dma_tx = dma_request_slave_channel_reason(dev, "tx");
+	if (IS_ERR(master->dma_tx)) {
+		dev_info(dev, "cannot get the TX DMA channel!\n");
+		ret = PTR_ERR(master->dma_tx);
+		master->dma_tx = NULL;
 		goto err;
 	}
 
 	/* Prepare for RX : */
-	master->dma_rx = dma_request_slave_channel(dev, "rx");
-	if (!master->dma_rx) {
-		dev_dbg(dev, "cannot get the DMA channel.\n");
-		ret = -EINVAL;
+	master->dma_rx = dma_request_slave_channel_reason(dev, "rx");
+	if (IS_ERR(master->dma_rx)) {
+		dev_info(dev, "cannot get the DMA channel.\n");
+		ret = PTR_ERR(master->dma_rx);
+		master->dma_rx = NULL;
 		goto err;
 	}
 
-- 
2.6.2

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/