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authorDexuan Cui <decui@microsoft.com>2015-04-22 21:31:30 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-05-24 12:18:23 -0700
commit813c5b7958a288c4333ef1eb2fa4b486cdcdda9a (patch)
tree82dab62921390f53d7592baa19f2e71a58c0afa2
parent096c605feb3d85b309e95db2afc01584b967cc23 (diff)
downloadlinux-813c5b7958a288c4333ef1eb2fa4b486cdcdda9a.tar.bz2
hv: vmbus_free_channels(): remove the redundant free_channel()
free_channel() has been invoked in vmbus_remove() -> hv_process_channel_removal(), or vmbus_remove() -> ... -> vmbus_close_internal() -> hv_process_channel_removal(). We also change to use list_for_each_entry_safe(), because the entry is removed in hv_process_channel_removal(). This patch fixes a bug in the vmbus unload path. Thank Dan Carpenter for finding the issue! Signed-off-by: Dexuan Cui <decui@microsoft.com> Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Cc: K. Y. Srinivasan <kys@microsoft.com> Cc: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/hv/channel_mgmt.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index 0eeb1b3bc048..865a3afa1d86 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -212,11 +212,16 @@ void hv_process_channel_removal(struct vmbus_channel *channel, u32 relid)
void vmbus_free_channels(void)
{
- struct vmbus_channel *channel;
+ struct vmbus_channel *channel, *tmp;
+
+ list_for_each_entry_safe(channel, tmp, &vmbus_connection.chn_list,
+ listentry) {
+ /* if we don't set rescind to true, vmbus_close_internal()
+ * won't invoke hv_process_channel_removal().
+ */
+ channel->rescind = true;
- list_for_each_entry(channel, &vmbus_connection.chn_list, listentry) {
vmbus_device_unregister(channel->device_obj);
- free_channel(channel);
}
}