From: Sascha Hauer Date: Thu, 25 Aug 2011 09:03:36 +0000 (+0200) Subject: dmaengine i.MX SDMA: set firmware scripts addresses to negative value initially X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=36e2f21ab481b3d6bd31b99e1de669fbbac4bd0e;p=linux-beck.git dmaengine i.MX SDMA: set firmware scripts addresses to negative value initially If we do not have a firmare script for a given transfer, the setup of this channel must fail. For this the script addresses have to be < 0 initially, not 0. Signed-off-by: Sascha Hauer Signed-off-by: Vinod Koul --- diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c index f50c87c303dd..8abf8c190aad 100644 --- a/drivers/dma/imx-sdma.c +++ b/drivers/dma/imx-sdma.c @@ -1281,6 +1281,7 @@ static int __init sdma_probe(struct platform_device *pdev) struct sdma_platform_data *pdata = pdev->dev.platform_data; int i; struct sdma_engine *sdma; + s32 *saddr_arr; sdma = kzalloc(sizeof(*sdma), GFP_KERNEL); if (!sdma) @@ -1324,6 +1325,11 @@ static int __init sdma_probe(struct platform_device *pdev) goto err_alloc; } + /* initially no scripts available */ + saddr_arr = (s32 *)sdma->script_addrs; + for (i = 0; i < SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1; i++) + saddr_arr[i] = -EINVAL; + if (of_id) pdev->id_entry = of_id->data; sdma->devtype = pdev->id_entry->driver_data;