mmc: davinci_mmc: allow driver to work without DMA resource

Do not return probe failure with missing DMA resources, allow driver
to work in PIO mode.  Tested on da850-evm by mounting partition
followed by file creation and deletion.

Signed-off-by: Manjunathappa, Prakash <prakash.pm@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

diff --git a/drivers/mmc/host/davinci_mmc.c b/drivers/mmc/host/davinci_mmc.c
index 20636772c09bd2aa2b794f44c3029e1f57559578..27123f8b7041222e6ae2298d50403e9b7d61babf 100644 (file)
--- a/drivers/mmc/host/davinci_mmc.c
+++ b/drivers/mmc/host/davinci_mmc.c
@@ -1190,13 +1190,15 @@ static int __init davinci_mmcsd_probe(struct platform_device *pdev)
 
        r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
        if (!r)
-               goto out;
-       host->rxdma = r->start;
+               dev_warn(&pdev->dev, "RX DMA resource not specified\n");
+       else
+               host->rxdma = r->start;
 
        r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
        if (!r)
-               goto out;
-       host->txdma = r->start;
+               dev_warn(&pdev->dev, "TX DMA resource not specified\n");
+       else
+               host->txdma = r->start;
 
        host->mem_res = mem;
        host->base = ioremap(mem->start, mem_size);