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firewire: core: use guard macro to maintain list of receivers for phy configuration packets

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The core function maintains clients to receive phy configuration packets
by list in the instance of fw_card. The concurrent access to the list is
protected by spinlock in the instance.

This commit uses guard macro to maintain the list.

Link: https://lore.kernel.org/r/20240805085408.251763-13-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
This commit is contained in:
Takashi Sakamoto 2024-08-05 17:54:03 +09:00
parent cf123b0128
commit b9545448f0
1 changed files with 5 additions and 12 deletions
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17
drivers/firewire/core-cdev.c
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@ -1659,26 +1659,22 @@ static int ioctl_receive_phy_packets(struct client *client, union ioctl_arg *arg
if (!client->device->is_local)
return -ENOSYS;
spin_lock_irq(&card->lock);
guard(spinlock_irq)(&card->lock);
list_move_tail(&client->phy_receiver_link, &card->phy_receiver_list);
client->phy_receiver_closure = a->closure;
spin_unlock_irq(&card->lock);
return 0;
}
void fw_cdev_handle_phy_packet(struct fw_card *card, struct fw_packet *p)
{
struct client *client;
struct inbound_phy_packet_event *e;
unsigned long flags;
spin_lock_irqsave(&card->lock, flags);
guard(spinlock_irqsave)(&card->lock);
list_for_each_entry(client, &card->phy_receiver_list, phy_receiver_link) {
e = kmalloc(sizeof(*e) + 8, GFP_ATOMIC);
struct inbound_phy_packet_event *e = kmalloc(sizeof(*e) + 8, GFP_ATOMIC);
if (e == NULL)
break;
@ -1706,8 +1702,6 @@ void fw_cdev_handle_phy_packet(struct fw_card *card, struct fw_packet *p)
queue_event(client, &e->event, &e->phy_packet, sizeof(*pp) + 8, NULL, 0);
}
}
spin_unlock_irqrestore(&card->lock, flags);
}
static int (* const ioctl_handlers[])(struct client *, union ioctl_arg *) = {
@ -1855,9 +1849,8 @@ static int fw_device_op_release(struct inode *inode, struct file *file)
struct client *client = file->private_data;
struct event *event, *next_event;
spin_lock_irq(&client->device->card->lock);
list_del(&client->phy_receiver_link);
spin_unlock_irq(&client->device->card->lock);
scoped_guard(spinlock_irq, &client->device->card->lock)
list_del(&client->phy_receiver_link);
scoped_guard(mutex, &client->device->client_list_mutex)
list_del(&client->link);