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Commit 357e836a authored by Vitaly Kuznetsov's avatar Vitaly Kuznetsov Committed by Greg Kroah-Hartman
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Drivers: hv: vmbus: decrease num_sc on subchannel removal 



It is unlikely that that host will ask us to close only one subchannel for a
device but let's be consistent. Do both num_sc++ and num_sc-- with
channel->lock to be on the safe side.

Signed-off-by: default avatarVitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent fea844a2

drivers/hv/channel_mgmt.c

+2 −1
Original line number Diff line number Diff line
@@ -205,6 +205,7 @@ void hv_process_channel_removal(struct vmbus_channel *channel, u32 relid) 
		primary_channel = channel->primary_channel;

		spin_lock_irqsave(&primary_channel->lock, flags);

		list_del(&channel->sc_list);

		primary_channel->num_sc--;

		spin_unlock_irqrestore(&primary_channel->lock, flags);

	}

	free_channel(channel);
@@ -265,8 +266,8 @@ static void vmbus_process_offer(struct vmbus_channel *newchannel) 
			newchannel->primary_channel = channel;

			spin_lock_irqsave(&channel->lock, flags);

			list_add_tail(&newchannel->sc_list, &channel->sc_list);

			spin_unlock_irqrestore(&channel->lock, flags);

			channel->num_sc++;

			spin_unlock_irqrestore(&channel->lock, flags);

		} else

			goto err_free_chan;

	}