mmc: wmt-sdmmc: Fix NULL pointer dereference

'of_id' is dereferenced before NULL pointer check. Move it to
after the check.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Tony Prisk <linux@prisktech.co.nz>
Signed-off-by: Chris Ball <chris@printf.net>

diff --git a/drivers/mmc/host/wmt-sdmmc.c b/drivers/mmc/host/wmt-sdmmc.c
index e902ed7..498d1f7 100644 (file)
--- a/drivers/mmc/host/wmt-sdmmc.c
+++ b/drivers/mmc/host/wmt-sdmmc.c
@@ -757,7 +757,7 @@ static int wmt_mci_probe(struct platform_device *pdev)
        struct device_node *np = pdev->dev.of_node;
        const struct of_device_id *of_id =
                of_match_device(wmt_mci_dt_ids, &pdev->dev);
-       const struct wmt_mci_caps *wmt_caps = of_id->data;
+       const struct wmt_mci_caps *wmt_caps;
        int ret;
        int regular_irq, dma_irq;
 
@@ -766,6 +766,8 @@ static int wmt_mci_probe(struct platform_device *pdev)
                return -EFAULT;
        }
 
+       wmt_caps = of_id->data;
+
        if (!np) {
                dev_err(&pdev->dev, "Missing SDMMC description in devicetree\n");
                return -EFAULT;