From: jsg <jsg@openbsd.org>
Date: Thu, 15 Jun 2023 02:46:22 +0000 (+0000)
Subject: drm/i915: taint kernel when force probing unsupported devices
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=d218186b6ee9c3dca05062c1e840bf763326cefd;p=openbsd

drm/i915: taint kernel when force probing unsupported devices

From Jani Nikula
dcd289136bccf2bdd519ee1eb355ed71c73cbe75 in linux-6.1.y/6.1.30
79c901c93562bdf1c84ce6c1b744fbbe4389a6eb in mainline linux
---

diff --git a/sys/dev/pci/drm/i915/i915_pci.c b/sys/dev/pci/drm/i915/i915_pci.c
index ef72617b105..7869032004d 100644
--- a/sys/dev/pci/drm/i915/i915_pci.c
+++ b/sys/dev/pci/drm/i915/i915_pci.c
@@ -1344,6 +1344,12 @@ static int i915_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		return -ENODEV;
 	}
 
+	if (intel_info->require_force_probe) {
+		dev_info(&pdev->dev, "Force probing unsupported Device ID %04x, tainting kernel\n",
+			 pdev->device);
+		add_taint(TAINT_USER, LOCKDEP_STILL_OK);
+	}
+
 	/* Only bind to function 0 of the device. Early generations
 	 * used function 1 as a placeholder for multi-head. This causes
 	 * us confusion instead, especially on the systems where both