diff mbox series

[1/3] clk: ti: autoidle: add checks against NULL pointer reference

Message ID 20200907082600.454-2-t-kristo@ti.com (mailing list archive)
State New, archived
Headers show
Series clk: ti: minor fixes and add sha2 instance for dra7 | expand

Commit Message

Tero Kristo Sept. 7, 2020, 8:25 a.m. UTC 
The clk pointer passed to omap2_clk_(deny|allow)_idle can be NULL, so
add checks for this.

Reported-by: Dan Murphy <dmurphy@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
---
 drivers/clk/ti/autoidle.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

Comments

Stephen Boyd Sept. 22, 2020, 8 p.m. UTC | #1 
Quoting Tero Kristo (2020-09-07 01:25:58)
> The clk pointer passed to omap2_clk_(deny|allow)_idle can be NULL, so
> add checks for this.
> 
> Reported-by: Dan Murphy <dmurphy@ti.com>
> Signed-off-by: Tero Kristo <t-kristo@ti.com>
> ---

Applied to clk-next
diff mbox series

Patch

diff --git a/drivers/clk/ti/autoidle.c b/drivers/clk/ti/autoidle.c
index 1cae226759dd..f6f8a409f148 100644
--- a/drivers/clk/ti/autoidle.c
+++ b/drivers/clk/ti/autoidle.c
@@ -82,7 +82,12 @@  static int _omap2_clk_allow_idle(struct clk_hw_omap *clk)
  */
 int omap2_clk_deny_idle(struct clk *clk)
 {
-	struct clk_hw *hw = __clk_get_hw(clk);
+	struct clk_hw *hw;
+
+	if (!clk)
+		return -EINVAL;
+
+	hw = __clk_get_hw(clk);
 
 	if (omap2_clk_is_hw_omap(hw)) {
 		struct clk_hw_omap *c = to_clk_hw_omap(hw);
@@ -101,7 +106,12 @@  int omap2_clk_deny_idle(struct clk *clk)
  */
 int omap2_clk_allow_idle(struct clk *clk)
 {
-	struct clk_hw *hw = __clk_get_hw(clk);
+	struct clk_hw *hw;
+
+	if (!clk)
+		return -EINVAL;
+
+	hw = __clk_get_hw(clk);
 
 	if (omap2_clk_is_hw_omap(hw)) {
 		struct clk_hw_omap *c = to_clk_hw_omap(hw);