ACPI/PPTT: Add acpi_pptt_warn_missing() to consolidate logs

For a system using ACPI-based FW without a PPTT, we may get many warnings
about the lack of a PPTT, as shown:

root@(none)$ dmesg | grep -i pptt
[    0.010125] ACPI PPTT: No PPTT table found, cpu topology may be inaccurate
[    7.138339] ACPI PPTT: No PPTT table found, cache topology may be inaccurate
[    7.145368] ACPI PPTT: No PPTT table found, cache topology may be inaccurate

These logs are generated with pr_warn_once(), so the intention was for a
single log, but the logs overlap, so consolidate them.

Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Jeremy Linton <jeremy.linton@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 9 insertions, 4 deletions

diff --git a/drivers/acpi/pptt.c b/drivers/acpi/pptt.c
index da031b1df6f5..ad31c50de3be 100644
--- a/drivers/acpi/pptt.c
+++ b/drivers/acpi/pptt.c
@@ -451,6 +451,11 @@ static struct acpi_pptt_processor *acpi_find_processor_package_id(struct acpi_ta
         return cpu;
 }
 
+static void acpi_pptt_warn_missing(void)
+{
+        pr_warn_once("No PPTT table found, cpu and cache topology may be inaccurate\n");
+}
+
 /**
  * topology_get_acpi_cpu_tag() - Find a unique topology value for a feature
  * @table: Pointer to the head of the PPTT table
@@ -498,7 +503,7 @@ static int find_acpi_cpu_topology_tag(unsigned int cpu, int level, int flag)
 
         status = acpi_get_table(ACPI_SIG_PPTT, 0, &table);
         if (ACPI_FAILURE(status)) {
-                pr_warn_once("No PPTT table found, cpu topology may be inaccurate\n");
+                acpi_pptt_warn_missing();
                 return -ENOENT;
         }
         retval = topology_get_acpi_cpu_tag(table, cpu, level, flag);
@@ -531,7 +536,7 @@ int acpi_find_last_cache_level(unsigned int cpu)
         acpi_cpu_id = get_acpi_id_for_cpu(cpu);
         status = acpi_get_table(ACPI_SIG_PPTT, 0, &table);
         if (ACPI_FAILURE(status)) {
-                pr_warn_once("No PPTT table found, cache topology may be inaccurate\n");
+                acpi_pptt_warn_missing();
         } else {
                 number_of_levels = acpi_find_cache_levels(table, acpi_cpu_id);
                 acpi_put_table(table);
@@ -563,7 +568,7 @@ int cache_setup_acpi(unsigned int cpu)
 
         status = acpi_get_table(ACPI_SIG_PPTT, 0, &table);
         if (ACPI_FAILURE(status)) {
-                pr_warn_once("No PPTT table found, cache topology may be inaccurate\n");
+                acpi_pptt_warn_missing();
                 return -ENOENT;
         }
 
@@ -617,7 +622,7 @@ int find_acpi_cpu_cache_topology(unsigned int cpu, int level)
 
         status = acpi_get_table(ACPI_SIG_PPTT, 0, &table);
         if (ACPI_FAILURE(status)) {
-                pr_warn_once("No PPTT table found, topology may be inaccurate\n");
+                acpi_pptt_warn_missing();
                 return -ENOENT;
         }