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authorDexuan Cui <decui@microsoft.com>2015-12-14 16:01:51 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-12-14 19:15:05 -0800
commitd6f591e339d23f434efda11917da511870891472 (patch)
tree031bf2d9e6c519789fe7413d75587c87a00d334c /drivers/hv
parentf52078cf5711ce47c113a58702b35c8ff5f212f5 (diff)
downloadlinux-d6f591e339d23f434efda11917da511870891472.tar.bz2
Drivers: hv: vmbus: channge vmbus_connection.channel_lock to mutex
spinlock is unnecessary here. mutex is enough. Signed-off-by: Dexuan Cui <decui@microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hv')
-rw-r--r--drivers/hv/channel_mgmt.c12
-rw-r--r--drivers/hv/connection.c7
-rw-r--r--drivers/hv/hyperv_vmbus.h2
3 files changed, 10 insertions, 11 deletions
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index 9c9da3a6c03a..d0131717c1d5 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -206,9 +206,9 @@ void hv_process_channel_removal(struct vmbus_channel *channel, u32 relid)
}
if (channel->primary_channel == NULL) {
- spin_lock_irqsave(&vmbus_connection.channel_lock, flags);
+ mutex_lock(&vmbus_connection.channel_mutex);
list_del(&channel->listentry);
- spin_unlock_irqrestore(&vmbus_connection.channel_lock, flags);
+ mutex_unlock(&vmbus_connection.channel_mutex);
primary_channel = channel;
} else {
@@ -253,7 +253,7 @@ static void vmbus_process_offer(struct vmbus_channel *newchannel)
unsigned long flags;
/* Make sure this is a new offer */
- spin_lock_irqsave(&vmbus_connection.channel_lock, flags);
+ mutex_lock(&vmbus_connection.channel_mutex);
list_for_each_entry(channel, &vmbus_connection.chn_list, listentry) {
if (!uuid_le_cmp(channel->offermsg.offer.if_type,
@@ -269,7 +269,7 @@ static void vmbus_process_offer(struct vmbus_channel *newchannel)
list_add_tail(&newchannel->listentry,
&vmbus_connection.chn_list);
- spin_unlock_irqrestore(&vmbus_connection.channel_lock, flags);
+ mutex_unlock(&vmbus_connection.channel_mutex);
if (!fnew) {
/*
@@ -341,9 +341,9 @@ static void vmbus_process_offer(struct vmbus_channel *newchannel)
err_deq_chan:
vmbus_release_relid(newchannel->offermsg.child_relid);
- spin_lock_irqsave(&vmbus_connection.channel_lock, flags);
+ mutex_lock(&vmbus_connection.channel_mutex);
list_del(&newchannel->listentry);
- spin_unlock_irqrestore(&vmbus_connection.channel_lock, flags);
+ mutex_unlock(&vmbus_connection.channel_mutex);
if (newchannel->target_cpu != get_cpu()) {
put_cpu();
diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c
index 4fc2e8836e60..521f48ed188e 100644
--- a/drivers/hv/connection.c
+++ b/drivers/hv/connection.c
@@ -146,7 +146,7 @@ int vmbus_connect(void)
spin_lock_init(&vmbus_connection.channelmsg_lock);
INIT_LIST_HEAD(&vmbus_connection.chn_list);
- spin_lock_init(&vmbus_connection.channel_lock);
+ mutex_init(&vmbus_connection.channel_mutex);
/*
* Setup the vmbus event connection for channel interrupt
@@ -282,11 +282,10 @@ struct vmbus_channel *relid2channel(u32 relid)
{
struct vmbus_channel *channel;
struct vmbus_channel *found_channel = NULL;
- unsigned long flags;
struct list_head *cur, *tmp;
struct vmbus_channel *cur_sc;
- spin_lock_irqsave(&vmbus_connection.channel_lock, flags);
+ mutex_lock(&vmbus_connection.channel_mutex);
list_for_each_entry(channel, &vmbus_connection.chn_list, listentry) {
if (channel->offermsg.child_relid == relid) {
found_channel = channel;
@@ -305,7 +304,7 @@ struct vmbus_channel *relid2channel(u32 relid)
}
}
}
- spin_unlock_irqrestore(&vmbus_connection.channel_lock, flags);
+ mutex_unlock(&vmbus_connection.channel_mutex);
return found_channel;
}
diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h
index 9beeb148797f..4d67e984ac4f 100644
--- a/drivers/hv/hyperv_vmbus.h
+++ b/drivers/hv/hyperv_vmbus.h
@@ -683,7 +683,7 @@ struct vmbus_connection {
/* List of channels */
struct list_head chn_list;
- spinlock_t channel_lock;
+ struct mutex channel_mutex;
struct workqueue_struct *work_queue;
};