[PATCH 02/12] mtd: nand: davinci: check required ti,davinci-chipselect property

["Khoronzhuk, Ivan" <ivan.khoronzhuk@xxxxxx>]

The property "ti,davinci-chipselect" is required. So we have to check
if it is set.

Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@xxxxxx>
---
 drivers/mtd/nand/davinci_nand.c |   10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/nand/davinci_nand.c b/drivers/mtd/nand/davinci_nand.c
index d87213f..8e1c88e 100644
--- a/drivers/mtd/nand/davinci_nand.c
+++ b/drivers/mtd/nand/davinci_nand.c
@@ -541,10 +541,14 @@ static struct davinci_nand_pdata
                                GFP_KERNEL);
                pdev->dev.platform_data = pdata;
                if (!pdata)
-                       return NULL;
+                       return ERR_PTR(-ENOMEM);
+
                if (!of_property_read_u32(pdev->dev.of_node,
                        "ti,davinci-chipselect", &prop))
                        pdev->id = prop;
+               else
+                       return ERR_PTR(-EINVAL);
+
                if (!of_property_read_u32(pdev->dev.of_node,
                        "ti,davinci-mask-ale", &prop))
                        pdata->mask_ale = prop;
@@ -598,6 +602,10 @@ static int __init nand_davinci_probe(struct platform_device *pdev)
        nand_ecc_modes_t                ecc_mode;

        pdata = nand_davinci_get_pdata(pdev);
+       if (IS_ERR(pdata)) {
+               return PTR_ERR(pdata);
+       }
+
        /* insist on board-specific configuration */
        if (!pdata)
                return -ENODEV;
--
1.7.9.5

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