From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 410DFC624A4 for ; Thu, 3 Sep 2026 15:58:08 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 92FD910E0C5; Thu, 3 Sep 2026 15:58:07 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="q8TA/JdP"; dkim-atps=neutral Received: from mail-wr1-f49.google.com (mail-wr1-f49.google.com [209.85.221.49]) by gabe.freedesktop.org (Postfix) with ESMTPS id 77CEA10E0C5 for ; Thu, 3 Sep 2026 15:58:06 +0000 (UTC) Received: by mail-wr1-f49.google.com with SMTP id ffacd0b85a97d-482dd6ee390so26131f8f.3 for ; Thu, 03 Sep 2026 08:58:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1788451085; x=1789055885; darn=lists.freedesktop.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to:content-type; bh=b6tKOR5KZSNLaAYuQSBE34bjWw9CzqlGHsE0UPAcN9E=; b=q8TA/JdPCSsYkTiZJIk8pKurKOxrbt+HT++0TvryfN/7VOpDHXrMPxC99kuFSQkVNA zW/3nSklpe9D3mF3hn7VsoKzjxhwjKcBorpmQgWGVbDpTLrvRBNYAJ3zi8JHvmywp/W6 XuBt7dID4KrUc3IF+Upw6nMjxIWlUE7moC0I2Sp0yjXY9QCegDjteI4TpUN1scToVxyh uyohHcnPQVuWkq7KuNwNkG/D1iGd1iFsqYVaGIEEBe2kV3pbVBXkMkMfpD2L1+eBdvRL bD4j6zQiuqAsL0j2YoVv+dIFiTIooSYDOT1CQ7Xhc72pca1glJqfQok4CnAOnMMEbhma CAJQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1788451085; x=1789055885; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=b6tKOR5KZSNLaAYuQSBE34bjWw9CzqlGHsE0UPAcN9E=; b=ZnUACgtl40u1EZpAVFupRku/oqKSd3if21xyXvrdXi2eFu6qsnPcSlh01HDRQQcsuc GpaHVgVjKYJYdzdOm0H/vsPfGrvfSpHQGiRzB5+qU635I/eKFIifLo3ftB6M8CRxCyVB 2r8xYZ1AVMivlPOhQ6EannqqadQDMxjWTFc0V3swZXBscLrP2TRNifm489CabAUsenpz 0zhUIw0z0PiyCPhlXoYaow4ElYkUrAJXZsuH2JsQ5CDsvtFl75RL2/JlDfc5aildlu2J oSgWd4ET5uwmXgHNOGHOEUUMLP147S1HnYpJAVNYKhBGOKjzegh5wBmQzHXag9BTd1SI dUGw== X-Gm-Message-State: AFuF++nmITaEUWB0/ivVzAc9ZtMm0gqQla+h7PRf1GxSUVjhCIi8ogpT 9EzgPQgTmjUOw/cMS1973HPyGtiUPDyUbxGEPMmqM/uX82jpP/d9w8ynohK+ylQX X-Gm-Gg: AYBFou3+j3d8gJ8PPvuycPtKsyyPeggBQ+vaHq9uaAcjyU+LlCJgpHvj2WUXGMczUZ/ M8YtfSDxh+aB5R1sySqs7zZRjCzDaBnYuqxA3NYiuhVPPbSl0PGA1ks91yn2DILylQcbOL68B7P frrGvaJ5JQC5uzzUgbb3tK9F2If2bBz0o6rA8WmXk9+ZsRXuVfMZj4kjPC33PEkHTG8aGH5SnPY fasuveEy6TUtKg1g8o+aqQGjRMVug02uAam47Ifrgm8ayLgpTjdUkZyxT6yFTxwzOXl5OGprJd8 NrVd5vPnX8PUuX972Nb7AZ7yjB6tLiU7RIToMHnYPZJaOheoGhNJGmD8Vr6qRWnlB5ZjgNoUzQp 2X0i9YIo3OA1tYf/b1yuCYwJDT8uQPU/4soGkqu0W9JyAoyqYzjaSYJeKJgr/c5QasD2QBtkbVg gRd22/0GxXuKkMUlkgUdUx4rAANpQlJhSznyHvykn1gz4CiIvmArhKtumciTbpehZTL83yqUann XiMpA== X-Received: by 2002:a05:600c:6749:b0:49c:c96a:d36b with SMTP id 5b1f17b1804b1-49cf5be1647mr19593155e9.12.1788451084371; Thu, 03 Sep 2026 08:58:04 -0700 (PDT) Received: from localhost.localdomain ([82.215.83.93]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-48448e736a6sm14388587f8f.5.2026.09.03.08.58.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 03 Sep 2026 08:58:03 -0700 (PDT) From: Andrey Erokhin To: dri-devel@lists.freedesktop.org Cc: linux-kernel@vger.kernel.org, Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , =?UTF-8?q?Christian=20K=C3=B6nig?= , =?UTF-8?q?Micha=C5=82=20Winiarski?= , stable@vger.kernel.org Subject: [PATCH] drm: Register the full minor range Date: Thu, 3 Sep 2026 20:57:43 +0500 Message-ID: <20260903155745.3027211-1-language.lawyer@gmail.com> X-Mailer: git-send-email 2.55.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Commit 071d583e01c8 ("drm: Expand max DRM device number to full MINORBITS") expanded DRM minor allocation to the full range provided by MINORBITS. However, drm_core_init() still uses register_chrdev(), which registers only minors 0 through 255. Consequently, character-device lookup for a DRM minor greater than 255 fails with -ENXIO before drm_stub_open() can handle the open. Register and unregister the full minor range explicitly. Fixes: 071d583e01c8 ("drm: Expand max DRM device number to full MINORBITS") Cc: stable@vger.kernel.org Signed-off-by: Andrey Erokhin --- drivers/gpu/drm/drm_drv.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c index c808958a2188..25819c88c627 100644 --- a/drivers/gpu/drm/drm_drv.c +++ b/drivers/gpu/drm/drm_drv.c @@ -1250,7 +1250,7 @@ static void drm_core_exit(void) drm_privacy_screen_lookup_exit(); drm_panic_exit(); accel_core_exit(); - unregister_chrdev(DRM_MAJOR, "drm"); + __unregister_chrdev(DRM_MAJOR, 0, MINORMASK + 1, "drm"); drm_debugfs_remove_root(); drm_sysfs_destroy(); WARN_ON(!xa_empty(&drm_minors_xa)); @@ -1273,7 +1273,7 @@ static int __init drm_core_init(void) drm_debugfs_init_root(); drm_debugfs_bridge_params(); - ret = register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops); + ret = __register_chrdev(DRM_MAJOR, 0, MINORMASK + 1, "drm", &drm_stub_fops); if (ret < 0) goto error; -- 2.55.0