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authorK. Y. Srinivasan <kys@microsoft.com>2015-02-27 11:26:04 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-03-01 19:30:08 -0800
commit40384e4bbeb9f2651fe9bffc0062d9f31ef625bf (patch)
treecf93c3c72e813f1be0ece2f6a42a6f1fece1b625 /drivers/hv
parentb057b3ad16e1c6e21e234cd7f5c61c525da97f17 (diff)
downloadlinux-40384e4bbeb9f2651fe9bffc0062d9f31ef625bf.tar.bz2
Drivers: hv: vmbus: Fix a bug in the error path in vmbus_open()
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> Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hv')
-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 f6879950e131..bf0cf8f3bcaf 100644
--- a/drivers/hv/channel.c
+++ b/drivers/hv/channel.c
@@ -137,7 +137,7 @@ 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);
@@ -153,7 +153,7 @@ 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)
@@ -197,6 +197,9 @@ 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));