From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792584931; b=AzNF50vY09MDJLYN0NHxoFSfUYAUG2/+lzSt1N8LraLb5j+yuDHkKtuRyB3QOa2M4SzB XN8dxUEUNj5aljX45x1oz5USbweoaz9qKOOHdmGESgvObdksdsXEPap9t/O4S29TnMnBd M5Rx5VaHl40T/O+ULgKlWPNC/UJ0x2OmWu0PyAhDW/meK427nlG8rexQGdYQiV77LTObf Tn1HkACIw9w+L/Y+OnauyPn5HM0z9evVqsi0+npX0NF9Wb4VnOTVKK8z5Y8EBYNyQ3lq9 syERuSxrnqnnjIJJrXQrxR6/yw5pm6FtE41VxrifzYZXpjsdH5tGjdlUemS3bkFEMRQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792584931; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=X9lWh4O6O7Umzil2pxjsOPjFQX4WkHiI/3kxYZplzAY=; b=T9y7VXKw2O1MlfyKHw0b6+v9U7bjyghniUDXysRXPCYMwvmuNO5CjK1mhJDOcrqs6Ui3 XGwPqkv/qcw+cDWNkgxHhsqOMMBrGXAqEg81uuwJ8Pe4+I4jmwX9TJlXZysEuUjaane5Y o8DZGomtnJzAa3IUOqwegAr2VlBcB1g/OfmxWAnA5oT8aZPGgKnseQBIAFtq3XKCKFMjV EInf9OHeTDd97Y0gmqKwvzFg8+R6sbHS7GnC+JAg9lTof8NDPUiOR0wvCP75ejjHokCs0 5wcGO5Lz3VuSJF9DGhNY6IKz/+Y8WG9I6ISx4q/SLT0iWUFaSh+A/7j9QObue7eLMCg== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=S97KVlOa; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3ABE1606A321; Wed, 21 Oct 2026 12:15:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=S97KVlOa Received: by smtp.kernel.org (Postfix) with ESMTPSA id 390511F000C4; Wed, 21 Oct 2026 12:15:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792584930; bh=X9lWh4O6O7Umzil2pxjsOPjFQX4WkHiI/3kxYZplzAY=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=S97KVlOaNk7UeV9V67X4hdY7yar3aMYGquTLgF/sf9CPyYn6wickeS7DDsV12lw7/ Yl1IBvB/8Gv4VKc0O+VJWadzuD666BCmNy/yytqe8k7EHsh70NIW/apxE5S2hCdhTu nSHEHm1lxbLfjVq3Rho4NvJepBZ1ghQ2SJd7ijcjswzGKysmpUPlLmRzpOfj6KV4Hu qBwdIjPW7o5Yu75A7RIpocZLgLN8Y9PBHoaqcdOmHrnaNsUrQ5pqHi2Zp0S8uU87aK anpwftz0tEXdNjmybuCRtWbcoWtiqFNaxiDCM6ooy/jNcmzF2qGhBXb9pLiZkAOFk+ 10zw7k2T1k06g== From: Lee Jones To: lee@kernel.org, Qunqin Zhao , Yinggang Gu , Huacai Chen , linux-crypto@vger.kernel.org, mfd@lists.linux.dev, linux-kernel@vger.kernel.org Cc: stable@vger.kernel.org Subject: [PATCH 15/28] mfd: loongson-se: Check return value of dma_set_mask_and_coherent() Date: Wed, 21 Oct 2026 12:09:37 +0000 Message-ID: <20261021121245.3111563-15-lee@kernel.org> X-Mailer: git-send-email 2.56.0.218.g1ec904b173-goog In-Reply-To: <20261021121245.3111563-1-lee@kernel.org> References: <20261021121245.3111563-1-lee@kernel.org> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit loongson_se_probe() ignores the return value of dma_set_mask_and_coherent() when requesting a 64-bit DMA mask before allocating coherent DMA memory. Check the return value and abort probe if the platform cannot satisfy the 64-bit DMA mask requirement. Fixes: e551fa3159e3 ("mfd: Add support for Loongson Security Engine chip controller") Closes: https://sashiko.dev/#/bug/linux-6685ee0c-b7ed-4f21-8800-cc705cec449b Cc: stable@vger.kernel.org Signed-off-by: Lee Jones --- drivers/mfd/loongson-se.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/mfd/loongson-se.c b/drivers/mfd/loongson-se.c index 3902ba377d69..8dcb90a067b3 100644 --- a/drivers/mfd/loongson-se.c +++ b/drivers/mfd/loongson-se.c @@ -199,7 +199,10 @@ static int loongson_se_probe(struct platform_device *pdev) spin_lock_init(&se->dev_lock); mutex_init(&se->engine_init_lock); - dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)); + err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)); + if (err) + return err; + if (device_property_read_u32(dev, "dmam_size", &se->dmam_size)) return -ENODEV; -- 2.56.0.218.g1ec904b173-goog