linux-kernel - [PATCH 5.19 174/717] drm/amd/display: explicitly disable psr_feature

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20221022072446.314280756@linuxfoundation.org>
Date:   Sat, 22 Oct 2022 09:20:53 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Shirish S <shirish.s@....com>,
        Leo Li <sunpeng.li@....com>,
        Mario Limonciello <mario.limonciello@....com>,
        Alex Deucher <alexander.deucher@....com>
Subject: [PATCH 5.19 174/717] drm/amd/display: explicitly disable psr_feature_enable appropriately

From: Shirish S <shirish.s@....com>

commit 6094b9136ca9038b61e9c4b5d25cd5512ce50b34 upstream.

[Why]
If psr_feature_enable is set to true by default, it continues to be enabled
for non capable links.

[How]
explicitly disable the feature on links that are not capable of the same.

Fixes: 8c322309e48e9 ("drm/amd/display: Enable PSR")
Signed-off-by: Shirish S <shirish.s@....com>
Reviewed-by: Leo Li <sunpeng.li@....com>
Reviewed-by: Mario Limonciello <mario.limonciello@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Cc: stable@...r.kernel.org # 5.15+
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_psr.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_psr.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_psr.c
@@ -60,11 +60,15 @@ static bool link_supports_psrsu(struct d
  */
 void amdgpu_dm_set_psr_caps(struct dc_link *link)
 {
-	if (!(link->connector_signal & SIGNAL_TYPE_EDP))
+	if (!(link->connector_signal & SIGNAL_TYPE_EDP)) {
+		link->psr_settings.psr_feature_enabled = false;
 		return;
+	}
 
-	if (link->type == dc_connection_none)
+	if (link->type == dc_connection_none) {
+		link->psr_settings.psr_feature_enabled = false;
 		return;
+	}
 
 	if (link->dpcd_caps.psr_info.psr_version == 0) {
 		link->psr_settings.psr_version = DC_PSR_VERSION_UNSUPPORTED;