diff options
Diffstat (limited to '0062-Drivers-hv-vmbus-Release-cpu-lock-in-error-case.patch')
| -rw-r--r-- | 0062-Drivers-hv-vmbus-Release-cpu-lock-in-error-case.patch | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/0062-Drivers-hv-vmbus-Release-cpu-lock-in-error-case.patch b/0062-Drivers-hv-vmbus-Release-cpu-lock-in-error-case.patch new file mode 100644 index 000000000000..4f7947404f20 --- /dev/null +++ b/0062-Drivers-hv-vmbus-Release-cpu-lock-in-error-case.patch @@ -0,0 +1,31 @@ +From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 +From: Saurabh Sengar <ssengar@linux.microsoft.com> +Date: Thu, 9 Jun 2022 10:16:36 -0700 +Subject: [PATCH] Drivers: hv: vmbus: Release cpu lock in error case + +[ Upstream commit 656c5ba50b7172a0ea25dc1b37606bd51d01fe8d ] + +In case of invalid sub channel, release cpu lock before returning. + +Fixes: a949e86c0d780 ("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> +--- + drivers/hv/channel_mgmt.c | 1 + + 1 file changed, 1 insertion(+) + +diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c +index 85a2142c9384007d2bc43a1f072ceb7b96b0c53b..073ff9b6f5352dfc2540a0a53bd180d1b459a9e2 100644 +--- a/drivers/hv/channel_mgmt.c ++++ b/drivers/hv/channel_mgmt.c +@@ -637,6 +637,7 @@ static void vmbus_process_offer(struct vmbus_channel *newchannel) + */ + if (newchannel->offermsg.offer.sub_channel_index == 0) { + mutex_unlock(&vmbus_connection.channel_mutex); ++ cpus_read_unlock(); + /* + * Don't call free_channel(), because newchannel->kobj + * is not initialized yet. |