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Date:   Sun,  1 Nov 2020 11:54:24 -0800
From:   Davidlohr Bueso <dave@...olabs.net>
To:     mchehab@...nel.org
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        dave@...olabs.net, Davidlohr Bueso <dbueso@...e.de>
Subject: [PATCH] media/siano: kill pointless kmutex definitions

Use the mutex api instead of renaming the calls for this
driver.

Signed-off-by: Davidlohr Bueso <dbueso@...e.de>
---
This was found while auditing mutex semantics in drivers.

 drivers/media/common/siano/smscoreapi.c  | 42 ++++++++++++------------
 drivers/media/common/siano/smscoreapi.h  |  5 ---
 drivers/media/common/siano/smsdvb-main.c | 14 ++++----
 3 files changed, 28 insertions(+), 33 deletions(-)

diff --git a/drivers/media/common/siano/smscoreapi.c b/drivers/media/common/siano/smscoreapi.c
index c1511094fdc7..410cc3ac6f94 100644
--- a/drivers/media/common/siano/smscoreapi.c
+++ b/drivers/media/common/siano/smscoreapi.c
@@ -429,13 +429,13 @@ static struct smscore_registry_entry_t *smscore_find_registry(char *devpath)
 	struct smscore_registry_entry_t *entry;
 	struct list_head *next;
 
-	kmutex_lock(&g_smscore_registrylock);
+	mutex_lock(&g_smscore_registrylock);
 	for (next = g_smscore_registry.next;
 	     next != &g_smscore_registry;
 	     next = next->next) {
 		entry = (struct smscore_registry_entry_t *) next;
 		if (!strncmp(entry->devpath, devpath, sizeof(entry->devpath))) {
-			kmutex_unlock(&g_smscore_registrylock);
+			mutex_unlock(&g_smscore_registrylock);
 			return entry;
 		}
 	}
@@ -446,7 +446,7 @@ static struct smscore_registry_entry_t *smscore_find_registry(char *devpath)
 		list_add(&entry->entry, &g_smscore_registry);
 	} else
 		pr_err("failed to create smscore_registry.\n");
-	kmutex_unlock(&g_smscore_registrylock);
+	mutex_unlock(&g_smscore_registrylock);
 	return entry;
 }
 
@@ -527,7 +527,7 @@ int smscore_register_hotplug(hotplug_t hotplug)
 	struct list_head *next, *first;
 	int rc = 0;
 
-	kmutex_lock(&g_smscore_deviceslock);
+	mutex_lock(&g_smscore_deviceslock);
 	notifyee = kmalloc(sizeof(*notifyee), GFP_KERNEL);
 	if (notifyee) {
 		/* now notify callback about existing devices */
@@ -548,7 +548,7 @@ int smscore_register_hotplug(hotplug_t hotplug)
 	} else
 		rc = -ENOMEM;
 
-	kmutex_unlock(&g_smscore_deviceslock);
+	mutex_unlock(&g_smscore_deviceslock);
 
 	return rc;
 }
@@ -564,7 +564,7 @@ void smscore_unregister_hotplug(hotplug_t hotplug)
 {
 	struct list_head *next, *first;
 
-	kmutex_lock(&g_smscore_deviceslock);
+	mutex_lock(&g_smscore_deviceslock);
 
 	first = &g_smscore_notifyees;
 
@@ -579,7 +579,7 @@ void smscore_unregister_hotplug(hotplug_t hotplug)
 		}
 	}
 
-	kmutex_unlock(&g_smscore_deviceslock);
+	mutex_unlock(&g_smscore_deviceslock);
 }
 EXPORT_SYMBOL_GPL(smscore_unregister_hotplug);
 
@@ -732,9 +732,9 @@ int smscore_register_device(struct smsdevice_params_t *params,
 	smscore_registry_settype(dev->devpath, params->device_type);
 
 	/* add device to devices list */
-	kmutex_lock(&g_smscore_deviceslock);
+	mutex_lock(&g_smscore_deviceslock);
 	list_add(&dev->entry, &g_smscore_devices);
-	kmutex_unlock(&g_smscore_deviceslock);
+	mutex_unlock(&g_smscore_deviceslock);
 
 	*coredev = dev;
 
@@ -890,14 +890,14 @@ int smscore_start_device(struct smscore_device_t *coredev)
 		return rc;
 	}
 
-	kmutex_lock(&g_smscore_deviceslock);
+	mutex_lock(&g_smscore_deviceslock);
 
 	rc = smscore_notify_callbacks(coredev, coredev->device, 1);
 	smscore_init_ir(coredev);
 
 	pr_debug("device %p started, rc %d\n", coredev, rc);
 
-	kmutex_unlock(&g_smscore_deviceslock);
+	mutex_unlock(&g_smscore_deviceslock);
 
 	return rc;
 }
@@ -1197,7 +1197,7 @@ void smscore_unregister_device(struct smscore_device_t *coredev)
 	int num_buffers = 0;
 	int retry = 0;
 
-	kmutex_lock(&g_smscore_deviceslock);
+	mutex_lock(&g_smscore_deviceslock);
 
 	/* Release input device (IR) resources */
 	sms_ir_exit(coredev);
@@ -1224,9 +1224,9 @@ void smscore_unregister_device(struct smscore_device_t *coredev)
 
 		pr_debug("waiting for %d buffer(s)\n",
 			 coredev->num_buffers - num_buffers);
-		kmutex_unlock(&g_smscore_deviceslock);
+		mutex_unlock(&g_smscore_deviceslock);
 		msleep(100);
-		kmutex_lock(&g_smscore_deviceslock);
+		mutex_lock(&g_smscore_deviceslock);
 	}
 
 	pr_debug("freed %d buffers\n", num_buffers);
@@ -1245,7 +1245,7 @@ void smscore_unregister_device(struct smscore_device_t *coredev)
 	list_del(&coredev->entry);
 	kfree(coredev);
 
-	kmutex_unlock(&g_smscore_deviceslock);
+	mutex_unlock(&g_smscore_deviceslock);
 
 	pr_debug("device %p destroyed\n", coredev);
 }
@@ -2123,17 +2123,17 @@ static int __init smscore_module_init(void)
 {
 	INIT_LIST_HEAD(&g_smscore_notifyees);
 	INIT_LIST_HEAD(&g_smscore_devices);
-	kmutex_init(&g_smscore_deviceslock);
+	mutex_init(&g_smscore_deviceslock);
 
 	INIT_LIST_HEAD(&g_smscore_registry);
-	kmutex_init(&g_smscore_registrylock);
+	mutex_init(&g_smscore_registrylock);
 
 	return 0;
 }
 
 static void __exit smscore_module_exit(void)
 {
-	kmutex_lock(&g_smscore_deviceslock);
+	mutex_lock(&g_smscore_deviceslock);
 	while (!list_empty(&g_smscore_notifyees)) {
 		struct smscore_device_notifyee_t *notifyee =
 			(struct smscore_device_notifyee_t *)
@@ -2142,9 +2142,9 @@ static void __exit smscore_module_exit(void)
 		list_del(&notifyee->entry);
 		kfree(notifyee);
 	}
-	kmutex_unlock(&g_smscore_deviceslock);
+	mutex_unlock(&g_smscore_deviceslock);
 
-	kmutex_lock(&g_smscore_registrylock);
+	mutex_lock(&g_smscore_registrylock);
 	while (!list_empty(&g_smscore_registry)) {
 		struct smscore_registry_entry_t *entry =
 			(struct smscore_registry_entry_t *)
@@ -2153,7 +2153,7 @@ static void __exit smscore_module_exit(void)
 		list_del(&entry->entry);
 		kfree(entry);
 	}
-	kmutex_unlock(&g_smscore_registrylock);
+	mutex_unlock(&g_smscore_registrylock);
 
 	pr_debug("\n");
 }
diff --git a/drivers/media/common/siano/smscoreapi.h b/drivers/media/common/siano/smscoreapi.h
index b3b793b5caf3..4a6b9f4c44ac 100644
--- a/drivers/media/common/siano/smscoreapi.h
+++ b/drivers/media/common/siano/smscoreapi.h
@@ -28,11 +28,6 @@ Copyright (C) 2006-2008, Uri Shkolnik, Anatoly Greenblat
 
 #include "smsir.h"
 
-#define kmutex_init(_p_) mutex_init(_p_)
-#define kmutex_lock(_p_) mutex_lock(_p_)
-#define kmutex_trylock(_p_) mutex_trylock(_p_)
-#define kmutex_unlock(_p_) mutex_unlock(_p_)
-
 /*
  * Define the firmware names used by the driver.
  * Those should match what's used at smscoreapi.c and sms-cards.c
diff --git a/drivers/media/common/siano/smsdvb-main.c b/drivers/media/common/siano/smsdvb-main.c
index 88f90dfd368b..633902036e30 100644
--- a/drivers/media/common/siano/smsdvb-main.c
+++ b/drivers/media/common/siano/smsdvb-main.c
@@ -630,11 +630,11 @@ static void smsdvb_unregister_client(struct smsdvb_client_t *client)
 
 static void smsdvb_onremove(void *context)
 {
-	kmutex_lock(&g_smsdvb_clientslock);
+	mutex_lock(&g_smsdvb_clientslock);
 
 	smsdvb_unregister_client((struct smsdvb_client_t *) context);
 
-	kmutex_unlock(&g_smsdvb_clientslock);
+	mutex_unlock(&g_smsdvb_clientslock);
 }
 
 static int smsdvb_start_feed(struct dvb_demux_feed *feed)
@@ -1151,11 +1151,11 @@ static int smsdvb_hotplug(struct smscore_device_t *coredev,
 	init_completion(&client->tune_done);
 	init_completion(&client->stats_done);
 
-	kmutex_lock(&g_smsdvb_clientslock);
+	mutex_lock(&g_smsdvb_clientslock);
 
 	list_add(&client->entry, &g_smsdvb_clients);
 
-	kmutex_unlock(&g_smsdvb_clientslock);
+	mutex_unlock(&g_smsdvb_clientslock);
 
 	client->event_fe_state = -1;
 	client->event_unc_state = -1;
@@ -1198,7 +1198,7 @@ static int __init smsdvb_module_init(void)
 	int rc;
 
 	INIT_LIST_HEAD(&g_smsdvb_clients);
-	kmutex_init(&g_smsdvb_clientslock);
+	mutex_init(&g_smsdvb_clientslock);
 
 	smsdvb_debugfs_register();
 
@@ -1213,14 +1213,14 @@ static void __exit smsdvb_module_exit(void)
 {
 	smscore_unregister_hotplug(smsdvb_hotplug);
 
-	kmutex_lock(&g_smsdvb_clientslock);
+	mutex_lock(&g_smsdvb_clientslock);
 
 	while (!list_empty(&g_smsdvb_clients))
 		smsdvb_unregister_client((struct smsdvb_client_t *)g_smsdvb_clients.next);
 
 	smsdvb_debugfs_unregister();
 
-	kmutex_unlock(&g_smsdvb_clientslock);
+	mutex_unlock(&g_smsdvb_clientslock);
 }
 
 module_init(smsdvb_module_init);
-- 
2.26.2

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