OMAP clockdomain: if no autodeps exist, don't try to add or remove them

_clkdm_add_autodeps() and _clkdm_del_autodeps() will attempt to dereference
a NULL pointer if no autodeps were supplied to clkdm_init().

Based on a patch from Roel Kluin <roel.kluin@gmail.com> - thanks Roel.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Roel Kluin <roel.kluin@gmail.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/clockdomain.c b/arch/arm/mach-omap2/clockdomain.c
index de4278c19029..b26d30a14303 100644
--- a/arch/arm/mach-omap2/clockdomain.c
+++ b/arch/arm/mach-omap2/clockdomain.c
@@ -173,6 +173,9 @@ static void _clkdm_add_autodeps(struct clockdomain *clkdm)
 {
         struct clkdm_autodep *autodep;
 
+        if (!autodeps)
+                return;
+
         for (autodep = autodeps; autodep->clkdm.ptr; autodep++) {
                 if (IS_ERR(autodep->clkdm.ptr))
                         continue;
@@ -201,6 +204,9 @@ static void _clkdm_del_autodeps(struct clockdomain *clkdm)
 {
         struct clkdm_autodep *autodep;
 
+        if (!autodeps)
+                return;
+
         for (autodep = autodeps; autodep->clkdm.ptr; autodep++) {
                 if (IS_ERR(autodep->clkdm.ptr))
                         continue;