linux-kernel - [PATCH AUTOSEL 6.14 607/642] drm/xe: Do not attempt to bootstrap VF in execlists mode

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Message-Id: <20250505221419.2672473-607-sashal@kernel.org>
Date: Mon,  5 May 2025 18:13:43 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Maarten Lankhorst <dev@...khorst.se>,
	Lucas De Marchi <lucas.demarchi@...el.com>,
	Sasha Levin <sashal@...nel.org>,
	thomas.hellstrom@...ux.intel.com,
	rodrigo.vivi@...el.com,
	airlied@...il.com,
	simona@...ll.ch,
	intel-xe@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 6.14 607/642] drm/xe: Do not attempt to bootstrap VF in execlists mode

From: Maarten Lankhorst <dev@...khorst.se>

[ Upstream commit f3b59457808f61d88178b0afa67cbd017d7ce79e ]

It was mentioned in a review that there is a possibility of choosing
to load the module with VF in execlists mode.

Of course this doesn't work, just bomb out as hard as possible.

Reviewed-by: Lucas De Marchi <lucas.demarchi@...el.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241210083111.230484-12-dev@lankhorst.se
Signed-off-by: Maarten Lankhorst <dev@...khorst.se>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/xe/xe_gt_sriov_vf.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_gt_sriov_vf.c b/drivers/gpu/drm/xe/xe_gt_sriov_vf.c
index 1c764f200b2a5..a439261bf4d72 100644
--- a/drivers/gpu/drm/xe/xe_gt_sriov_vf.c
+++ b/drivers/gpu/drm/xe/xe_gt_sriov_vf.c
@@ -236,6 +236,9 @@ int xe_gt_sriov_vf_bootstrap(struct xe_gt *gt)
 {
 	int err;
 
+	if (!xe_device_uc_enabled(gt_to_xe(gt)))
+		return -ENODEV;
+
 	err = vf_reset_guc_state(gt);
 	if (unlikely(err))
 		return err;
-- 
2.39.5