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authorDavid Fries <David@Fries.net>2014-01-16 05:29:18 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-02-08 00:40:17 +0100
commit9fcbbac5ded489c3a4e121343db999dd51cd6c75 (patch)
tree1207602c8d7cc2da54784114a5d32d9ed6924b58 /drivers/w1/w1_int.c
parentw1: new netlink commands, add/remove/list slaves (diff)
downloadlinux-9fcbbac5ded489c3a4e121343db999dd51cd6c75.tar.xz
linux-9fcbbac5ded489c3a4e121343db999dd51cd6c75.zip
w1: process w1 netlink commands in w1_process thread
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>
Diffstat (limited to 'drivers/w1/w1_int.c')
-rw-r--r--drivers/w1/w1_int.c17
1 files changed, 13 insertions, 4 deletions
diff --git a/drivers/w1/w1_int.c b/drivers/w1/w1_int.c
index 423f3c2b9e7d..66b2caae48f3 100644
--- a/drivers/w1/w1_int.c
+++ b/drivers/w1/w1_int.c
@@ -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;