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Drivers: hv: vmbus: Release cpu lock in error case

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[ Upstream commit 656c5ba50b7172a0ea25dc1b37606bd51d01fe8d ]

In case of invalid sub channel, release cpu lock before returning.

Fixes: a949e86c0d ("Drivers: hv: vmbus: Resolve race between init_vp_index() and CPU hotplug")
Signed-off-by: Saurabh Sengar <ssengar@linux.microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/1654794996-13244-1-git-send-email-ssengar@linux.microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Saurabh Sengar
2022-06-09 10:16:36 -07:00
committed by Greg Kroah-Hartman
parent 814092927a
commit 5334455067
1 changed files with 1 additions and 0 deletions
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drivers/hv/channel_mgmt.c
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@@ -606,6 +606,7 @@ static void vmbus_process_offer(struct vmbus_channel *newchannel)
*/ */
if (newchannel->offermsg.offer.sub_channel_index == 0) { if (newchannel->offermsg.offer.sub_channel_index == 0) {
mutex_unlock(&vmbus_connection.channel_mutex); mutex_unlock(&vmbus_connection.channel_mutex);
cpus_read_unlock();
/* /*
* Don't call free_channel(), because newchannel->kobj * Don't call free_channel(), because newchannel->kobj
* is not initialized yet. * is not initialized yet.