From c6354f54f9c9099f5ede823b43ce805ffcd69efa Mon Sep 17 00:00:00 2001
From: Molyuu <1055126159@qq.com>
Date: Sun, 14 Dec 2025 00:40:59 +0800
Subject: [PATCH] drm: convert vd path before compare with explicit device path
 (#222)

FreeBSD always returning symbolic links '/dev/dri/card*' pointed to '/dev/drm/*',
so output device will never be found if `AQ_DRM_DEVICES` is set as explicit devices
path is converted to canonical file path.
---
 src/backend/drm/DRM.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/backend/drm/DRM.cpp b/src/backend/drm/DRM.cpp
index 35a923d..a639182 100644
--- a/src/backend/drm/DRM.cpp
+++ b/src/backend/drm/DRM.cpp
@@ -200,7 +200,14 @@ static std::vector<SP<CSessionDevice>> scanGPUs(SP<CBackend> backend) {
         for (auto const& d : explicitDevices) {
             bool found = false;
             for (auto const& vd : devices) {
-                if (vd->path == d) {
+                std::error_code ec;
+                auto            canonicalFilePath = std::filesystem::canonical(vd->path, ec);
+                if (ec) {
+                    backend->log(AQ_LOG_ERROR, std::format("drm: Failed to canonicalize path {}", d));
+                    canonicalFilePath = vd->path;
+                }
+                
+                if (canonicalFilePath == d) {
                     vecDevices.emplace_back(vd);
                     found = true;
                     break;