Patch "drm/amd/display: Remove register from DCN35 DMCUB diagnostic collection" has been added to the 6.10-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: Remove register from DCN35 DMCUB diagnostic collection

to the 6.10-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-remove-register-from-dcn35-dmcub-dia.patch
and it can be found in the queue-6.10 subdirectory.

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



commit c4e304f5d9f3c0908cf8ecb19076c5f03923e901
Author: Nicholas Kazlauskas <nicholas.kazlauskas@xxxxxxx>
Date:   Tue May 28 15:25:30 2024 -0400

    drm/amd/display: Remove register from DCN35 DMCUB diagnostic collection
    
    [ Upstream commit 466423c6dd8af23ebb3a69d43434d01aed0db356 ]
    
    [Why]
    These registers should not be read from driver and triggering the
    security violation when DMCUB work times out and diagnostics are
    collected blocks Z8 entry.
    
    [How]
    Remove the register read from DCN35.
    
    Reviewed-by: Duncan Ma <duncan.ma@xxxxxxx>
    Acked-by: Zaeem Mohamed <zaeem.mohamed@xxxxxxx>
    Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@xxxxxxx>
    Tested-by: Daniel Wheeler <daniel.wheeler@xxxxxxx>
    Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn35.c b/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn35.c
index 70e63aeb8f89..a330827f900c 100644
--- a/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn35.c
+++ b/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn35.c
@@ -459,7 +459,7 @@ uint32_t dmub_dcn35_get_current_time(struct dmub_srv *dmub)
 void dmub_dcn35_get_diagnostic_data(struct dmub_srv *dmub, struct dmub_diagnostic_data *diag_data)
 {
 	uint32_t is_dmub_enabled, is_soft_reset, is_sec_reset;
-	uint32_t is_traceport_enabled, is_cw0_enabled, is_cw6_enabled;
+	uint32_t is_traceport_enabled, is_cw6_enabled;
 
 	if (!dmub || !diag_data)
 		return;
@@ -510,9 +510,6 @@ void dmub_dcn35_get_diagnostic_data(struct dmub_srv *dmub, struct dmub_diagnosti
 	REG_GET(DMCUB_CNTL, DMCUB_TRACEPORT_EN, &is_traceport_enabled);
 	diag_data->is_traceport_en  = is_traceport_enabled;
 
-	REG_GET(DMCUB_REGION3_CW0_TOP_ADDRESS, DMCUB_REGION3_CW0_ENABLE, &is_cw0_enabled);
-	diag_data->is_cw0_enabled = is_cw0_enabled;
-
 	REG_GET(DMCUB_REGION3_CW6_TOP_ADDRESS, DMCUB_REGION3_CW6_ENABLE, &is_cw6_enabled);
 	diag_data->is_cw6_enabled = is_cw6_enabled;