From 9fcbbac5ded489c3a4e121343db999dd51cd6c75 Mon Sep 17 00:00:00 2001 From: David Fries Date: Wed, 15 Jan 2014 22:29:18 -0600 Subject: 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 Acked-by: Evgeniy Polyakov Signed-off-by: Greg Kroah-Hartman --- drivers/w1/w1_int.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) (limited to 'drivers/w1/w1_int.c') 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; -- cgit v1.2.3