[PATCH] soc: mediatek: Handle return of of_match_device function

[Himanshu Jha]

In scpsys_probe function, return value of of_match_device function which
returns null is dereferenced without checking. Therefore, add a check for
potential null dereference.

Detected by CoverityScan, CID#1424087 "Dereference null return value"

Fixes: commit 53fddb1a66dd ("soc: mediatek: reduce code duplication of 
scpsys_probe across all SoCs")
Signed-off-by: Himanshu Jha <himanshujha199...@gmail.com>
---
 drivers/soc/mediatek/mtk-scpsys.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/soc/mediatek/mtk-scpsys.c 
b/drivers/soc/mediatek/mtk-scpsys.c
index 435ce5e..6e7f196 100644
--- a/drivers/soc/mediatek/mtk-scpsys.c
+++ b/drivers/soc/mediatek/mtk-scpsys.c
@@ -981,6 +981,9 @@ static int scpsys_probe(struct platform_device *pdev)
        int i, ret;
 
        match = of_match_device(of_scpsys_match_tbl, &pdev->dev);
+       if (!match)
+               return -EINVAL;
+
        soc = (const struct scp_soc_data *)match->data;
 
        scp = init_scp(pdev, soc->domains, soc->num_domains, &soc->regs,
-- 
2.7.4