asoc: tegra: fix Coverity issues of NULL dereference

- fix dereference after null check
  Coverity id : 23554
  Coverity id : 23555
- fix dereference of null return value
  Coverity id : 23338
- fix dereference before null check
  Coverity id : 23683
  Coverity id : 23684

Bug 1329327

Change-Id: I65542ff9da32810676c5b28fed463cf43c7807df
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/254991
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Sumit Bhattacharya <sumitb@nvidia.com>

diff --git a/sound/soc/tegra/tegra30_spdif.c b/sound/soc/tegra/tegra30_spdif.c
index 9c686f4387245fec94fd40560c71423b5d3ee846..0abb9d6ff2697480b90bfe4b57864375fc2b88a2 100644 (file)
--- a/sound/soc/tegra/tegra30_spdif.c
+++ b/sound/soc/tegra/tegra30_spdif.c
@@ -488,7 +488,10 @@ static int tegra30_spdif_platform_remove(struct platform_device *pdev)
        iounmap(spdif->regs);
 
        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-       release_mem_region(res->start, resource_size(res));
+       if (res)
+               release_mem_region(res->start, resource_size(res));
+       else
+               dev_err(&pdev->dev, "error getting memory resource\n");
 
        clk_put(spdif->clk_spdif_out);