[4/4] clk: socfpga: clk-pll: Fix the use of uninitialized variable

Commit Message

zhangzekun (A) Oct. 9, 2024, 6:32 a.m. UTC

The of_property_read_u32() can fail and leave the variable uninitialized,
which will then be used. Return before using the uninitialized variable.

Fixes: 97259e99bdc9 ("clk: socfpga: split clk code")
Signed-off-by: Zhang Zekun <[e-mail]>
---
 drivers/clk/socfpga/clk-pll.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Patch

diff --git a/drivers/clk/socfpga/clk-pll.c b/drivers/clk/socfpga/clk-pll.c
index 9dcc1b2d2cc0..9c3ce45cb907 100644
--- a/drivers/clk/socfpga/clk-pll.c
+++ b/drivers/clk/socfpga/clk-pll.c
@@ -82,7 +82,8 @@  static void __init __socfpga_pll_init(struct device_node *node,
 	struct device_node *clkmgr_np;
 	int rc;
 
-	of_property_read_u32(node, "reg", &reg);
+	if (of_property_read_u32(node, "reg", &reg))
+		return;
 
 	pll_clk = kzalloc(sizeof(*pll_clk), GFP_KERNEL);
 	if (WARN_ON(!pll_clk))