From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6743514830F; Tue, 23 Jan 2024 00:06:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705968388; cv=none; b=JGXde6J2J/Pa1JXqGuHWH9K8f2F4AUAdgSotVKMPCO0WsYJONozFqbgczSWiiRLPZ4bt/AkXz2kcDA7/w5XbvZHZMzIsMwlF/Jc6WaVbnTDeIi8Ed6Eid5C5MkBkHnq8lA16FpYRqFM+c8Kuh8KONF3zRpLfy4xvMx+cDFXcPLU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705968388; c=relaxed/simple; bh=qvZcMztYeRBU49SU+8PldygT7O2hyYfQkepP0VF7WJg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=TWCtdz7vzcUGAikYt5kcQ82JzR6B7Y+zHkqxhg7bd+NU8/sCCtGtHUl92leVRYfHgVioyrlgaBSOy2kQVrF7HggKbvuKNM/9NqrZTWMBPtk6QNH2/VfJdJwvN44pMLEaUDJesdEWxCjDljxVyJQ9rXZriDY97hZ+jAiOc1qNdRE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Rt7San1e; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Rt7San1e" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B823BC433F1; Tue, 23 Jan 2024 00:06:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1705968387; bh=qvZcMztYeRBU49SU+8PldygT7O2hyYfQkepP0VF7WJg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Rt7San1epHBEvv+Rp4zerflxaK23cA2a6skyXoNMjfrzH07dIjzcYzSJnd/XUZKsY arL7pccZY460T0Ojp4i2tCk6/8TVJ6h9NnB8AOihAcq+g0Vzfdb7hAhzB6cMx8hQ+C 4EkovA0EuyfhA+8jVqRC/+eXk2mtMJBytYxFw9Fo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Nikita Zhandarovich , Alex Deucher , Sasha Levin Subject: [PATCH 4.19 092/148] drm/radeon: check return value of radeon_ring_lock() Date: Mon, 22 Jan 2024 15:57:28 -0800 Message-ID: <20240122235716.109475148@linuxfoundation.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240122235712.442097787@linuxfoundation.org> References: <20240122235712.442097787@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Nikita Zhandarovich [ Upstream commit 71225e1c930942cb1e042fc08c5cc0c4ef30e95e ] In the unlikely event of radeon_ring_lock() failing, its errno return value should be processed. This patch checks said return value and prints a debug message in case of an error. Found by Linux Verification Center (linuxtesting.org) with static analysis tool SVACE. Fixes: 48c0c902e2e6 ("drm/radeon/kms: add support for CP setup on SI") Signed-off-by: Nikita Zhandarovich Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/radeon/si.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/radeon/si.c b/drivers/gpu/drm/radeon/si.c index 644ddd8d65ad..167dbcef0c38 100644 --- a/drivers/gpu/drm/radeon/si.c +++ b/drivers/gpu/drm/radeon/si.c @@ -3612,6 +3612,10 @@ static int si_cp_start(struct radeon_device *rdev) for (i = RADEON_RING_TYPE_GFX_INDEX; i <= CAYMAN_RING_TYPE_CP2_INDEX; ++i) { ring = &rdev->ring[i]; r = radeon_ring_lock(rdev, ring, 2); + if (r) { + DRM_ERROR("radeon: cp failed to lock ring (%d).\n", r); + return r; + } /* clear the compute context state */ radeon_ring_write(ring, PACKET3_COMPUTE(PACKET3_CLEAR_STATE, 0)); -- 2.43.0