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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>
This commit is contained in:
Dexuan Cui 2015-12-14 16:01:51 -08:00 committed by Greg Kroah-Hartman
parent f52078cf57
commit d6f591e339
3 changed files with 10 additions and 11 deletions
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12
drivers/hv/channel_mgmt.c
View File

@ -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();

7
drivers/hv/connection.c
View File

@ -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;
}

2
drivers/hv/hyperv_vmbus.h
View File

@ -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;
};