xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

w1: process w1 netlink commands in w1_process thread

Browse Source 
Netlink is a socket interface and is expected to be asynchronous.
Clients can now make w1 requests without blocking by making use of the
w1_master thread to process netlink commands which was previously only
used for doing an automatic bus search.

Signed-off-by: David Fries <David@Fries.net>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
David Fries
2014-01-15 22:29:18 -06:00
committed by Greg Kroah-Hartman
parent 70b34d2ed8
commit 9fcbbac5de
4 changed files with 296 additions and 91 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/w1/w1_int.c
View File

@@ -75,8 +75,10 @@ static struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl,
atomic_set(&dev->refcnt, 2);
INIT_LIST_HEAD(&dev->slist);
INIT_LIST_HEAD(&dev->async_list);
mutex_init(&dev->mutex);
mutex_init(&dev->bus_mutex);
mutex_init(&dev->list_mutex);
memcpy(&dev->dev, device, sizeof(struct device));
dev_set_name(&dev->dev, "w1_bus_master%u", dev->id);
@@ -188,17 +190,22 @@ void __w1_remove_master_device(struct w1_master *dev)
struct w1_netlink_msg msg;
struct w1_slave *sl, *sln;
set_bit(W1_ABORT_SEARCH, &dev->flags);
kthread_stop(dev->thread);
mutex_lock(&w1_mlock);
list_del(&dev->w1_master_entry);
mutex_unlock(&w1_mlock);
set_bit(W1_ABORT_SEARCH, &dev->flags);
kthread_stop(dev->thread);
mutex_lock(&dev->mutex);
list_for_each_entry_safe(sl, sln, &dev->slist, w1_slave_entry)
mutex_lock(&dev->list_mutex);
list_for_each_entry_safe(sl, sln, &dev->slist, w1_slave_entry) {
mutex_unlock(&dev->list_mutex);
w1_slave_detach(sl);
mutex_lock(&dev->list_mutex);
}
w1_destroy_master_attributes(dev);
mutex_unlock(&dev->list_mutex);
mutex_unlock(&dev->mutex);
atomic_dec(&dev->refcnt);
@@ -208,7 +215,9 @@ void __w1_remove_master_device(struct w1_master *dev)
if (msleep_interruptible(1000))
flush_signals(current);
w1_process_callbacks(dev);
}
w1_process_callbacks(dev);
memset(&msg, 0, sizeof(msg));
msg.id.mst.id = dev->id;