diff mbox series

[3/4] ACPI: EC: Make query handlers private

Message ID 20230225080458.1342359-4-W_Armin@gmx.de
State Superseded
Headers show
Series ACPI: SBS: Fix various issues | expand

Commit Message

Armin Wolf Feb. 25, 2023, 8:04 a.m. UTC 
The ability for external modules to register query handlers
was broken for a long time due to having only a single user.
With the only user (sbshc) having been converted to use the
more robust query notifier call chain, the query handler
functionality can be made private. This also allows for some
cleanups.

Tested on a Acer Travelmate 4000WLMi.

Signed-off-by: Armin Wolf <W_Armin@gmx.de>
---
 drivers/acpi/ec.c       | 36 ++++++++----------------------------
 drivers/acpi/internal.h |  5 -----
 2 files changed, 8 insertions(+), 33 deletions(-)

--
2.30.2

Comments

kernel test robot Feb. 25, 2023, 10:53 a.m. UTC | #1 
Hi Armin,

I love your patch! Perhaps something to improve:

[auto build test WARNING on rafael-pm/linux-next]
[also build test WARNING on linus/master v6.2 next-20230225]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Armin-Wolf/ACPI-EC-Add-query-notifier-support/20230225-160641
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
patch link:    https://lore.kernel.org/r/20230225080458.1342359-4-W_Armin%40gmx.de
patch subject: [PATCH 3/4] ACPI: EC: Make query handlers private
config: x86_64-randconfig-a001 (https://download.01.org/0day-ci/archive/20230225/202302251843.r0u8s41s-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel-lab-lkp/linux/commit/a62cb9e29bf040af617070fa775758720d2de12e
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Armin-Wolf/ACPI-EC-Add-query-notifier-support/20230225-160641
        git checkout a62cb9e29bf040af617070fa775758720d2de12e
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/acpi/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202302251843.r0u8s41s-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/acpi/ec.c:1083:5: warning: no previous prototype for function 'acpi_ec_add_query_handler' [-Wmissing-prototypes]
   int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit, acpi_handle handle)
       ^
   drivers/acpi/ec.c:1083:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit, acpi_handle handle)
   ^
   static 
   1 warning generated.


vim +/acpi_ec_add_query_handler +1083 drivers/acpi/ec.c

  1082	
> 1083	int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit, acpi_handle handle)
  1084	{
  1085		struct acpi_ec_query_handler *handler =
  1086		    kzalloc(sizeof(struct acpi_ec_query_handler), GFP_KERNEL);
  1087	
  1088		if (!handler)
  1089			return -ENOMEM;
  1090	
  1091		handler->query_bit = query_bit;
  1092		handler->handle = handle;
  1093		mutex_lock(&ec->mutex);
  1094		kref_init(&handler->kref);
  1095		list_add(&handler->node, &ec->list);
  1096		mutex_unlock(&ec->mutex);
  1097		return 0;
  1098	}
  1099
diff mbox series

Patch

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index dc7860a825a0..94391a62a44c 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -143,9 +143,7 @@  MODULE_PARM_DESC(ec_no_wakeup, "Do not wake up from suspend-to-idle");

 struct acpi_ec_query_handler {
 	struct list_head node;
-	acpi_ec_query_func func;
 	acpi_handle handle;
-	void *data;
 	u8 query_bit;
 	struct kref kref;
 };
@@ -1082,9 +1080,7 @@  static void acpi_ec_put_query_handler(struct acpi_ec_query_handler *handler)
 	kref_put(&handler->kref, acpi_ec_query_handler_release);
 }

-int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit,
-			      acpi_handle handle, acpi_ec_query_func func,
-			      void *data)
+int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit, acpi_handle handle)
 {
 	struct acpi_ec_query_handler *handler =
 	    kzalloc(sizeof(struct acpi_ec_query_handler), GFP_KERNEL);
@@ -1094,40 +1090,28 @@  int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit,

 	handler->query_bit = query_bit;
 	handler->handle = handle;
-	handler->func = func;
-	handler->data = data;
 	mutex_lock(&ec->mutex);
 	kref_init(&handler->kref);
 	list_add(&handler->node, &ec->list);
 	mutex_unlock(&ec->mutex);
 	return 0;
 }
-EXPORT_SYMBOL_GPL(acpi_ec_add_query_handler);

-static void acpi_ec_remove_query_handlers(struct acpi_ec *ec,
-					  bool remove_all, u8 query_bit)
+static void acpi_ec_remove_query_handlers(struct acpi_ec *ec)
 {
 	struct acpi_ec_query_handler *handler, *tmp;
 	LIST_HEAD(free_list);

 	mutex_lock(&ec->mutex);
 	list_for_each_entry_safe(handler, tmp, &ec->list, node) {
-		if (remove_all || query_bit == handler->query_bit) {
-			list_del_init(&handler->node);
-			list_add(&handler->node, &free_list);
-		}
+		list_del_init(&handler->node);
+		list_add(&handler->node, &free_list);
 	}
 	mutex_unlock(&ec->mutex);
 	list_for_each_entry_safe(handler, tmp, &free_list, node)
 		acpi_ec_put_query_handler(handler);
 }

-void acpi_ec_remove_query_handler(struct acpi_ec *ec, u8 query_bit)
-{
-	acpi_ec_remove_query_handlers(ec, false, query_bit);
-}
-EXPORT_SYMBOL_GPL(acpi_ec_remove_query_handler);
-
 int register_acpi_ec_query_notifier(struct notifier_block *nb)
 {
 	return blocking_notifier_chain_register(&acpi_ec_chain_head, nb);
@@ -1151,12 +1135,8 @@  static void acpi_ec_event_processor(struct work_struct *work)

 	/* Allow notifier handlers to override query handlers */
 	ret = blocking_notifier_call_chain(&acpi_ec_chain_head, handler->query_bit, ec);
-	if (ret != NOTIFY_BAD) {
-		if (handler->func)
-			handler->func(handler->data);
-		else if (handler->handle)
-			acpi_evaluate_object(handler->handle, NULL, NULL, NULL);
-	}
+	if (ret != NOTIFY_BAD && handler->handle)
+		acpi_evaluate_object(handler->handle, NULL, NULL, NULL);

 	ec_dbg_evt("Query(0x%02x) stopped", handler->query_bit);

@@ -1402,7 +1382,7 @@  acpi_ec_register_query_methods(acpi_handle handle, u32 level,
 	status = acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer);

 	if (ACPI_SUCCESS(status) && sscanf(node_name, "_Q%x", &value) == 1)
-		acpi_ec_add_query_handler(ec, value, handle, NULL, NULL);
+		acpi_ec_add_query_handler(ec, value, handle);
 	return AE_OK;
 }

@@ -1587,7 +1567,7 @@  static void ec_remove_handlers(struct acpi_ec *ec)
 		clear_bit(EC_FLAGS_EVENT_HANDLER_INSTALLED, &ec->flags);
 	}
 	if (test_bit(EC_FLAGS_QUERY_METHODS_INSTALLED, &ec->flags)) {
-		acpi_ec_remove_query_handlers(ec, true, 0);
+		acpi_ec_remove_query_handlers(ec);
 		clear_bit(EC_FLAGS_QUERY_METHODS_INSTALLED, &ec->flags);
 	}
 }
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index 6f41d42375ab..72ce5a9ba57f 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -202,17 +202,12 @@  extern struct acpi_ec *first_ec;

 /* If we find an EC via the ECDT, we need to keep a ptr to its context */
 /* External interfaces use first EC only, so remember */
-typedef int (*acpi_ec_query_func) (void *data);

 void acpi_ec_init(void);
 void acpi_ec_ecdt_probe(void);
 void acpi_ec_dsdt_probe(void);
 void acpi_ec_block_transactions(void);
 void acpi_ec_unblock_transactions(void);
-int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit,
-			      acpi_handle handle, acpi_ec_query_func func,
-			      void *data);
-void acpi_ec_remove_query_handler(struct acpi_ec *ec, u8 query_bit);

 int register_acpi_ec_query_notifier(struct notifier_block *nb);
 int unregister_acpi_ec_query_notifier(struct notifier_block *nb);