From: "K. Y. Srinivasan" <kys@xxxxxxxxxxxxx>
3.12-stable review patch. If anyone has any objections, please let me know.
===============
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@xxxxxxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
drivers/hv/channel.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c
index dea661331351..120237a90a86 100644
--- a/drivers/hv/channel.c
+++ b/drivers/hv/channel.c
@@ -178,7 +178,7 @@ 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);
@@ -194,7 +194,7 @@ 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)
@@ -238,6 +238,9 @@ 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));
--
2.3.7
--
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