Skip to content

Commit

Permalink
firmware loader: sync firmware cache by async_synchronize_full_domain
Browse files Browse the repository at this point in the history
async.c has provided synchronization mechanism on async_schedule_*,
so use async_synchronize_full_domain to sync caching firmware instead
of reinventing the wheel.

Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  • Loading branch information
Ming Lei authored and Greg Kroah-Hartman committed Oct 22, 2012
1 parent 746058f commit d28d388
Showing 1 changed file with 6 additions and 28 deletions.
34 changes: 6 additions & 28 deletions drivers/base/firmware_class.c
Original file line number Diff line number Diff line change
@@ -116,8 +116,6 @@ struct firmware_cache {
spinlock_t name_lock;
struct list_head fw_names;

wait_queue_head_t wait_queue;
int cnt;
struct delayed_work work;

struct notifier_block pm_notify;
@@ -1166,6 +1164,8 @@ int uncache_firmware(const char *fw_name)
}

#ifdef CONFIG_PM_SLEEP
static ASYNC_DOMAIN_EXCLUSIVE(fw_cache_domain);

static struct fw_cache_entry *alloc_fw_cache_entry(const char *name)
{
struct fw_cache_entry *fce;
@@ -1232,12 +1232,6 @@ static void __async_dev_cache_fw_image(void *fw_entry,

free_fw_cache_entry(fce);
}

spin_lock(&fwc->name_lock);
fwc->cnt--;
spin_unlock(&fwc->name_lock);

wake_up(&fwc->wait_queue);
}

/* called with dev->devres_lock held */
@@ -1278,7 +1272,6 @@ static void dev_cache_fw_image(struct device *dev, void *data)
spin_lock(&fwc->name_lock);
/* only one cache entry for one firmware */
if (!__fw_entry_found(fce->name)) {
fwc->cnt++;
list_add(&fce->list, &fwc->fw_names);
} else {
free_fw_cache_entry(fce);
@@ -1287,8 +1280,9 @@ static void dev_cache_fw_image(struct device *dev, void *data)
spin_unlock(&fwc->name_lock);

if (fce)
async_schedule(__async_dev_cache_fw_image,
(void *)fce);
async_schedule_domain(__async_dev_cache_fw_image,
(void *)fce,
&fw_cache_domain);
}
}

@@ -1350,21 +1344,7 @@ static void device_cache_fw_images(void)
mutex_unlock(&fw_lock);

/* wait for completion of caching firmware for all devices */
spin_lock(&fwc->name_lock);
for (;;) {
prepare_to_wait(&fwc->wait_queue, &wait,
TASK_UNINTERRUPTIBLE);
if (!fwc->cnt)
break;

spin_unlock(&fwc->name_lock);

schedule();

spin_lock(&fwc->name_lock);
}
spin_unlock(&fwc->name_lock);
finish_wait(&fwc->wait_queue, &wait);
async_synchronize_full_domain(&fw_cache_domain);

loading_timeout = old_timeout;
}
@@ -1452,9 +1432,7 @@ static void __init fw_cache_init(void)
#ifdef CONFIG_PM_SLEEP
spin_lock_init(&fw_cache.name_lock);
INIT_LIST_HEAD(&fw_cache.fw_names);
fw_cache.cnt = 0;

init_waitqueue_head(&fw_cache.wait_queue);
INIT_DELAYED_WORK(&fw_cache.work,
device_uncache_fw_images_work);

0 comments on commit d28d388

Please sign in to comment.