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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 <s.hauer@pengutronix.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Sascha Hauer 2011-08-25 11:03:36 +02:00 committed by Vinod Koul
parent 73eab978ad
commit 36e2f21ab4
1 changed files with 6 additions and 0 deletions
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6
drivers/dma/imx-sdma.c
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@ -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;