[PATCH] spi - Fix possible NULL derefrence.

[Shailendra Verma <shailendra.v@xxxxxxxxxxx>]

of_match_device could return NULL, and so can cause a NULL
pointer dereference later.

Signed-off-by: Shailendra Verma <shailendra.v@xxxxxxxxxxx>
---
 drivers/spi/spi-mxs.c |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/spi/spi-mxs.c b/drivers/spi/spi-mxs.c
index 5b0e9a3..c3aea7e 100644
--- a/drivers/spi/spi-mxs.c
+++ b/drivers/spi/spi-mxs.c
@@ -470,6 +470,11 @@ static int mxs_spi_probe(struct platform_device *pdev)
 	 */
 	const int clk_freq_default = 160000000;
 
+	if (!of_id) {
+		dev_err(&pdev->dev, "Error: No device match found\n");
+		return -ENODEV;
+	}
+
 	iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	irq_err = platform_get_irq(pdev, 0);
 	if (irq_err < 0)
-- 
1.7.9.5

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