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Drivers: hv: vmbus: Fix a bug in the error path in vmbus_open() 

commit 40384e4bbeb9f2651fe9bffc0062d9f31ef625bf upstream.

Correctly rollback state if the failure occurs after we have handed over
the ownership of the buffer to the host.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
K. Y. Srinivasan 2015-02-27 11:26:04 -08:00 committed by Greg Kroah-Hartman
parent a2ed2ed6fe
commit b020a4676d
1 changed files with 5 additions and 2 deletions
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7
drivers/hv/channel.c
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@ -169,7 +169,7 @@ int vmbus_open(struct vmbus_channel *newchannel, u32 send_ringbuffer_size,
GFP_KERNEL);
if (!open_info) {
err = -ENOMEM;
goto error0;
goto error_gpadl;
}
init_completion(&open_info->waitevent);
@ -185,7 +185,7 @@ int vmbus_open(struct vmbus_channel *newchannel, u32 send_ringbuffer_size,
if (userdatalen > MAX_USER_DEFINED_BYTES) {
err = -EINVAL;
goto error0;
goto error_gpadl;
}
if (userdatalen)
@ -226,6 +226,9 @@ error1:
list_del(&open_info->msglistentry);
spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
error_gpadl:
vmbus_teardown_gpadl(newchannel, newchannel->ringbuffer_gpadlhandle);
error0:
free_pages((unsigned long)out,
get_order(send_ringbuffer_size + recv_ringbuffer_size));