Patch "drm/amd/display: Unlock on error path in dm_handle_mst_sideband_msg_ready_event()" has been added to the 6.4-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    drm/amd/display: Unlock on error path in dm_handle_mst_sideband_msg_ready_event()

to the 6.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-amd-display-unlock-on-error-path-in-dm_handle_ms.patch
and it can be found in the queue-6.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 7caf588dd7d44facb74958da28bc1ebf8ad3077c
Author: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Date:   Fri Jul 21 17:55:49 2023 +0300

    drm/amd/display: Unlock on error path in dm_handle_mst_sideband_msg_ready_event()
    
    [ Upstream commit 38ac4e8385ffb275b1837986ca6c16f26ea028c5 ]
    
    This error path needs to unlock the "aconnector->handle_mst_msg_ready"
    mutex before returning.
    
    Fixes: 4f6d9e38c4d2 ("drm/amd/display: Add polling method to handle MST reply packet")
    Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
    Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
index 888e80f498e97..9bc86deac9e8e 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
@@ -706,7 +706,7 @@ void dm_handle_mst_sideband_msg_ready_event(
 
 			if (retry == 3) {
 				DRM_ERROR("Failed to ack MST event.\n");
-				return;
+				break;
 			}
 
 			drm_dp_mst_hpd_irq_send_new_request(&aconnector->mst_mgr);