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Commit d67cfb96 authored by Stefan Richter's avatar Stefan Richter
Browse files

firewire: convert client_list_lock to mutex 



So far it is only taken in non-atomic contexts.

Signed-off-by: default avatarStefan Richter <stefanr@s5r6.in-berlin.de>
parent cf417e54

drivers/firewire/fw-cdev.c

+8 −12
Original line number Diff line number Diff line
@@ -24,6 +24,7 @@ 
#include <linux/errno.h>

#include <linux/device.h>

#include <linux/vmalloc.h>

#include <linux/mutex.h>

#include <linux/poll.h>

#include <linux/preempt.h>

#include <linux/time.h>
@@ -108,7 +109,6 @@ static int fw_device_op_open(struct inode *inode, struct file *file) 
{

	struct fw_device *device;

	struct client *client;

	unsigned long flags;



	device = fw_device_get_by_devt(inode->i_rdev);

	if (device == NULL)
@@ -133,9 +133,9 @@ static int fw_device_op_open(struct inode *inode, struct file *file) 


	file->private_data = client;



	spin_lock_irqsave(&device->client_list_lock, flags);

	mutex_lock(&device->client_list_mutex);

	list_add_tail(&client->link, &device->client_list);

	spin_unlock_irqrestore(&device->client_list_lock, flags);

	mutex_unlock(&device->client_list_mutex);



	return 0;

}
@@ -232,14 +232,11 @@ for_each_client(struct fw_device *device, 
		void (*callback)(struct client *client))

{

	struct client *c;

	unsigned long flags;



	spin_lock_irqsave(&device->client_list_lock, flags);



	mutex_lock(&device->client_list_mutex);

	list_for_each_entry(c, &device->client_list, link)

		callback(c);



	spin_unlock_irqrestore(&device->client_list_lock, flags);

	mutex_unlock(&device->client_list_mutex);

}



static void
@@ -247,7 +244,7 @@ queue_bus_reset_event(struct client *client) 
{

	struct bus_reset *bus_reset;



	bus_reset = kzalloc(sizeof(*bus_reset), GFP_ATOMIC);

	bus_reset = kzalloc(sizeof(*bus_reset), GFP_KERNEL);

	if (bus_reset == NULL) {

		fw_notify("Out of memory when allocating bus reset event\n");

		return;
@@ -988,7 +985,6 @@ static int fw_device_op_release(struct inode *inode, struct file *file) 
	struct client *client = file->private_data;

	struct event *e, *next_e;

	struct client_resource *r, *next_r;

	unsigned long flags;



	if (client->buffer.pages)

		fw_iso_buffer_destroy(&client->buffer, client->device->card);
@@ -1007,9 +1003,9 @@ static int fw_device_op_release(struct inode *inode, struct file *file) 
	list_for_each_entry_safe(e, next_e, &client->event_list, link)

		kfree(e);



	spin_lock_irqsave(&client->device->client_list_lock, flags);

	mutex_lock(&client->device->client_list_mutex);

	list_del(&client->link);

	spin_unlock_irqrestore(&client->device->client_list_lock, flags);

	mutex_unlock(&client->device->client_list_mutex);



	fw_device_put(client->device);

	kfree(client);

drivers/firewire/fw-device.c

+2 −1
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ 
#include <linux/idr.h>

#include <linux/jiffies.h>

#include <linux/string.h>

#include <linux/mutex.h>

#include <linux/rwsem.h>

#include <linux/semaphore.h>

#include <linux/spinlock.h>
@@ -1005,7 +1006,7 @@ void fw_node_event(struct fw_card *card, struct fw_node *node, int event) 
		device->node = fw_node_get(node);

		device->node_id = node->node_id;

		device->generation = card->generation;

		spin_lock_init(&device->client_list_lock);

		mutex_init(&device->client_list_mutex);

		INIT_LIST_HEAD(&device->client_list);



		/*

drivers/firewire/fw-device.h

+4 −3
Original line number Diff line number Diff line
@@ -23,7 +23,7 @@ 
#include <linux/cdev.h>

#include <linux/idr.h>

#include <linux/rwsem.h>

#include <linux/spinlock.h>

#include <linux/mutex.h>

#include <asm/atomic.h>



enum fw_device_state {
@@ -65,9 +65,10 @@ struct fw_device { 
	bool cmc;

	struct fw_card *card;

	struct device device;

	/* to prevent deadlocks, never take this lock with card->lock held */

	spinlock_t client_list_lock;



	struct mutex client_list_mutex;

	struct list_head client_list;



	u32 *config_rom;

	size_t config_rom_length;

	int config_rom_retries;