ACPI / scan: constify first argument of struct acpi_scan_handler::match

One wouldn't expect a "match" function modify the string it searches
for, and indeed the only instance of the struct
acpi_scan_handler::match callback, acpi_pnp_match, can easily be
changed. While there, update its helper matching_id().

This is also preparation for constifying struct acpi_hardware_id::id.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

2 files changed, 3 insertions, 3 deletions

diff --git a/drivers/acpi/acpi_pnp.c b/drivers/acpi/acpi_pnp.c
index c58940b231d6..48fc3ad13a4b 100644
--- a/drivers/acpi/acpi_pnp.c
+++ b/drivers/acpi/acpi_pnp.c
@@ -316,7 +316,7 @@ static const struct acpi_device_id acpi_pnp_device_ids[] = {
         {""},
 };
 
-static bool matching_id(char *idstr, char *list_id)
+static bool matching_id(const char *idstr, const char *list_id)
 {
         int i;
 
@@ -333,7 +333,7 @@ static bool matching_id(char *idstr, char *list_id)
         return true;
 }
 
-static bool acpi_pnp_match(char *idstr, const struct acpi_device_id **matchid)
+static bool acpi_pnp_match(const char *idstr, const struct acpi_device_id **matchid)
 {
         const struct acpi_device_id *devid;
 
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 5ba8fb64f664..9a1b46c64fc1 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -129,7 +129,7 @@ static inline struct acpi_hotplug_profile *to_acpi_hotplug_profile(
 struct acpi_scan_handler {
         const struct acpi_device_id *ids;
         struct list_head list_node;
-        bool (*match)(char *idstr, const struct acpi_device_id **matchid);
+        bool (*match)(const char *idstr, const struct acpi_device_id **matchid);
         int (*attach)(struct acpi_device *dev, const struct acpi_device_id *id);
         void (*detach)(struct acpi_device *dev);
         void (*bind)(struct device *phys_dev);