ARM: OMAP2+: PM debug: fix the use of debugfs_create_* API

Check the return code pointer value from debugfs_create_dir for error
or NULL.
Also added an additional check to prevent the creation of a 'suspend'
entry at the debugfs root in case a power domain directory cannot be
created.

Signed-off-by: Jean Pihet <j-pihet@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>

diff --git a/arch/arm/mach-omap2/pm-debug.c b/arch/arm/mach-omap2/pm-debug.c
index 4411163..814bcd9 100644 (file)
--- a/arch/arm/mach-omap2/pm-debug.c
+++ b/arch/arm/mach-omap2/pm-debug.c
@@ -220,8 +220,8 @@ static int __init pwrdms_setup(struct powerdomain *pwrdm, void *dir)
                return 0;
 
        d = debugfs_create_dir(pwrdm->name, (struct dentry *)dir);
-
-       (void) debugfs_create_file("suspend", S_IRUGO|S_IWUSR, d,
+       if (!(IS_ERR_OR_NULL(d)))
+               (void) debugfs_create_file("suspend", S_IRUGO|S_IWUSR, d,
                        (void *)pwrdm, &pwrdm_suspend_fops);
 
        return 0;
@@ -264,7 +264,7 @@ static int __init pm_dbg_init(void)
                return 0;
 
        d = debugfs_create_dir("pm_debug", NULL);
-       if (IS_ERR(d))
+       if (IS_ERR_OR_NULL(d))
                return PTR_ERR(d);
 
        (void) debugfs_create_file("count", S_IRUGO,