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cpufreq: qcom-nvmem: eliminate uses of of_node_put()

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Make use of the __free() macro to automate memory deallocation when
the existing device nodes get out of scope, removing the need for
of_node_put() and therefore increasing code safety if more error paths
are added to the driver, which could miss the required of_node_put()
as it already occurred with commit '57f2f8b4aa0c ("cpufreq: qcom:
Refactor the driver to make it easier to extend")'.

Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Javier Carrasco 2024-05-23 23:25:00 +02:00 committed by Viresh Kumar
parent d01c84b97f
commit 9e697efe5f
1 changed files with 7 additions and 18 deletions
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25
drivers/cpufreq/qcom-cpufreq-nvmem.c
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@ -455,7 +455,6 @@ static int qcom_cpufreq_probe(struct platform_device *pdev)
{
struct qcom_cpufreq_drv *drv;
struct nvmem_cell *speedbin_nvmem;
struct device_node *np;
struct device *cpu_dev;
char pvs_name_buffer[] = "speedXX-pvsXX-vXX";
char *pvs_name = pvs_name_buffer;
@ -467,49 +466,40 @@ static int qcom_cpufreq_probe(struct platform_device *pdev)
if (!cpu_dev)
return -ENODEV;
np = dev_pm_opp_of_get_opp_desc_node(cpu_dev);
struct device_node *np __free(device_node) =
dev_pm_opp_of_get_opp_desc_node(cpu_dev);
if (!np)
return -ENOENT;
ret = of_device_is_compatible(np, "operating-points-v2-kryo-cpu") ||
of_device_is_compatible(np, "operating-points-v2-krait-cpu");
if (!ret) {
of_node_put(np);
if (!ret)
return -ENOENT;
}
drv = devm_kzalloc(&pdev->dev, struct_size(drv, cpus, num_possible_cpus()),
GFP_KERNEL);
if (!drv) {
of_node_put(np);
if (!drv)
return -ENOMEM;
}
match = pdev->dev.platform_data;
drv->data = match->data;
if (!drv->data) {
of_node_put(np);
if (!drv->data)
return -ENODEV;
}
if (drv->data->get_version) {
speedbin_nvmem = of_nvmem_cell_get(np, NULL);
if (IS_ERR(speedbin_nvmem)) {
of_node_put(np);
if (IS_ERR(speedbin_nvmem))
return dev_err_probe(cpu_dev, PTR_ERR(speedbin_nvmem),
"Could not get nvmem cell\n");
}
ret = drv->data->get_version(cpu_dev,
speedbin_nvmem, &pvs_name, drv);
if (ret) {
of_node_put(np);
nvmem_cell_put(speedbin_nvmem);
return ret;
}
nvmem_cell_put(speedbin_nvmem);
}
of_node_put(np);
for_each_possible_cpu(cpu) {
struct device **virt_devs = NULL;
@ -645,7 +635,7 @@ MODULE_DEVICE_TABLE(of, qcom_cpufreq_match_list);
*/
static int __init qcom_cpufreq_init(void)
{
struct device_node *np = of_find_node_by_path("/");
struct device_node *np __free(device_node) = of_find_node_by_path("/");
const struct of_device_id *match;
int ret;
@ -653,7 +643,6 @@ static int __init qcom_cpufreq_init(void)
return -ENODEV;
match = of_match_node(qcom_cpufreq_match_list, np);
of_node_put(np);
if (!match)
return -ENODEV;