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SubjectRe: [PATCH] ACPI / CPPC: clean up acpi_get_psd_map
On Thu, Mar 26, 2020 at 3:29 PM luanshi <zhangliguang@linux.alibaba.com> wrote:
>
> This patch cleans up acpi_get_psd_map function. If got here,
> variable all_cpu_data[] can't be NULL. Variable match_cpc_ptr has been
> checked before, no need check again at the end of the funchtion. Then
> some code logic should be optimized.
>
> Signed-off-by: Liguang Zhang <zhangliguang@linux.alibaba.com>
> ---
> drivers/acpi/cppc_acpi.c | 33 +++++++--------------------------
> 1 file changed, 7 insertions(+), 26 deletions(-)
>
> diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c
> index a1a858a..8b2e89c 100644
> --- a/drivers/acpi/cppc_acpi.c
> +++ b/drivers/acpi/cppc_acpi.c
> @@ -438,13 +438,10 @@ int acpi_get_psd_map(struct cppc_cpudata **all_cpu_data)
> * domain info.
> */
> for_each_possible_cpu(i) {
> - pr = all_cpu_data[i];
> - if (!pr)
> - continue;
> -
> if (cpumask_test_cpu(i, covered_cpus))
> continue;
>
> + pr = all_cpu_data[i];
> cpc_ptr = per_cpu(cpc_desc_ptr, i);
> if (!cpc_ptr) {
> retval = -EFAULT;
> @@ -495,44 +492,28 @@ int acpi_get_psd_map(struct cppc_cpudata **all_cpu_data)
> cpumask_set_cpu(j, pr->shared_cpu_map);
> }
>
> - for_each_possible_cpu(j) {
> + for_each_cpu(j, pr->shared_cpu_map) {
> if (i == j)
> continue;
>
> match_pr = all_cpu_data[j];
> - if (!match_pr)
> - continue;
> -
> - match_cpc_ptr = per_cpu(cpc_desc_ptr, j);
> - if (!match_cpc_ptr) {
> - retval = -EFAULT;
> - goto err_ret;
> - }
> -
> - match_pdomain = &(match_cpc_ptr->domain_info);
> - if (match_pdomain->domain != pdomain->domain)
> - continue;
> -
> match_pr->shared_type = pr->shared_type;
> cpumask_copy(match_pr->shared_cpu_map,
> pr->shared_cpu_map);
> }
> }
> + goto out;
>
> err_ret:
> for_each_possible_cpu(i) {
> pr = all_cpu_data[i];
> - if (!pr)
> - continue;
>
> /* Assume no coordination on any error parsing domain info */
> - if (retval) {
> - cpumask_clear(pr->shared_cpu_map);
> - cpumask_set_cpu(i, pr->shared_cpu_map);
> - pr->shared_type = CPUFREQ_SHARED_TYPE_ALL;
> - }
> + cpumask_clear(pr->shared_cpu_map);
> + cpumask_set_cpu(i, pr->shared_cpu_map);
> + pr->shared_type = CPUFREQ_SHARED_TYPE_ALL;
> }
> -
> +out:
> free_cpumask_var(covered_cpus);
> return retval;
> }
> --

Applied as 5.7 material with some changes in the changelog and subject, thanks!

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