diff mbox series

[3/3] clk: mvebu: Iterate over possible CPUs instead of DT CPU nodes

Message ID 20230327-mvebu-clk-fixes-v1-3-438de1026efd@kernel.org
State New
Headers
Series clk: Fix/cleanup mvebu CPU DT node accesses |

Commit Message

Rob Herring March 27, 2023, 6:43 p.m. UTC 
  Rework iterating over DT CPU nodes to iterate over possible CPUs
instead. There's no need to walk the DT CPU nodes again. Possible CPUs
is equal to the number of CPUs defined in the DT. Using the "reg" value
for an array index is fragile as it assumes "reg" is 0-N which often is
not the case.

Signed-off-by: Rob Herring <robh@kernel.org>
---
 drivers/clk/mvebu/clk-cpu.c | 14 +++-----------
 1 file changed, 3 insertions(+), 11 deletions(-)
diff mbox series

Patch

diff --git a/drivers/clk/mvebu/clk-cpu.c b/drivers/clk/mvebu/clk-cpu.c
index c2af3395cf13..db2b38c21304 100644
--- a/drivers/clk/mvebu/clk-cpu.c
+++ b/drivers/clk/mvebu/clk-cpu.c
@@ -168,8 +168,8 @@  static void __init of_cpu_clk_setup(struct device_node *node)
 	struct cpu_clk *cpuclk;
 	void __iomem *clock_complex_base = of_iomap(node, 0);
 	void __iomem *pmu_dfs_base = of_iomap(node, 1);
-	int ncpus = 0;
-	struct device_node *dn;
+	int ncpus = num_possible_cpus();
+	int cpu;
 
 	if (clock_complex_base == NULL) {
 		pr_err("%s: clock-complex base register not set\n",
@@ -181,9 +181,6 @@  static void __init of_cpu_clk_setup(struct device_node *node)
 		pr_warn("%s: pmu-dfs base register not set, dynamic frequency scaling not available\n",
 			__func__);
 
-	for_each_of_cpu_node(dn)
-		ncpus++;
-
 	cpuclk = kcalloc(ncpus, sizeof(*cpuclk), GFP_KERNEL);
 	if (WARN_ON(!cpuclk))
 		goto cpuclk_out;
@@ -192,19 +189,14 @@  static void __init of_cpu_clk_setup(struct device_node *node)
 	if (WARN_ON(!clks))
 		goto clks_out;
 
-	for_each_of_cpu_node(dn) {
+	for_each_possible_cpu(cpu) {
 		struct clk_init_data init;
 		struct clk *clk;
 		char *clk_name = kzalloc(5, GFP_KERNEL);
-		int cpu, err;
 
 		if (WARN_ON(!clk_name))
 			goto bail_out;
 
-		err = of_property_read_u32(dn, "reg", &cpu);
-		if (WARN_ON(err))
-			goto bail_out;
-
 		sprintf(clk_name, "cpu%d", cpu);
 
 		cpuclk[cpu].parent_name = of_clk_get_parent_name(node, 0);