summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorK. Y. Srinivasan <kys@microsoft.com>2015-02-27 11:26:04 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-05-06 21:56:26 +0200
commitb020a4676df1d550f893801f6c722845c2f6d5b3 (patch)
tree0da6e0a33c5f57ccfc87961c1d90e3f15945a109
parenta2ed2ed6fe49a3ffe9fba835c3a11c0e73d0c4cc (diff)
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>
-rw-r--r--drivers/hv/channel.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c
index 92f34de7aee9..05e6a7d13d4e 100644
--- a/drivers/hv/channel.c
+++ b/drivers/hv/channel.c
@@ -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));