diff mbox series

[U-Boot,1/2] video: ipu: Fix dereferencing NULL pointer problem

Message ID 1514877937-24144-1-git-send-email-peng.fan@nxp.com
State Superseded
Delegated to: Anatolij Gustschin
Headers show
Series [U-Boot,1/2] video: ipu: Fix dereferencing NULL pointer problem | expand

Commit Message

Peng Fan Jan. 2, 2018, 7:25 a.m. UTC 
The clk_set_rate function dereferences the clk pointer without
checking whether it is NULL. This may cause problem when clk is NULL.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
 drivers/video/ipu_common.c | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/drivers/video/ipu_common.c b/drivers/video/ipu_common.c
index 96229da502..b3b09e6982 100644
--- a/drivers/video/ipu_common.c
+++ b/drivers/video/ipu_common.c
@@ -134,6 +134,10 @@  int clk_set_rate(struct clk *clk, unsigned long rate)
 {
 	if (clk && clk->set_rate)
 		clk->set_rate(clk, rate);
+
+	if (!clk)
+		return 0;
+
 	return clk->rate;
 }