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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D4F3DC433F5 for ; Thu, 2 Dec 2021 09:16:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1356084AbhLBJUU (ORCPT ); Thu, 2 Dec 2021 04:20:20 -0500 Received: from smtp23.cstnet.cn ([159.226.251.23]:37850 "EHLO cstnet.cn" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S241170AbhLBJUR (ORCPT ); Thu, 2 Dec 2021 04:20:17 -0500 Received: from localhost.localdomain (unknown [124.16.138.128]) by APP-03 (Coremail) with SMTP id rQCowADHzVnxjqhhhBrgAA--.2166S2; Thu, 02 Dec 2021 17:16:34 +0800 (CST) From: Jiasheng Jiang To: gregkh@linuxfoundation.org Cc: linux-kernel@vger.kernel.org, Jiasheng Jiang Subject: [PATCH] uio: uio_dmem_genirq: Catch the Exception The return value of dma_set_coherent_mask() is not always 0. To catch the exception in case that dma is not support the mask. Date: Thu, 2 Dec 2021 17:16:30 +0800 Message-Id: <20211202091630.1489107-1-jiasheng@iscas.ac.cn> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID: rQCowADHzVnxjqhhhBrgAA--.2166S2 X-Coremail-Antispam: 1UD129KBjvdXoW7Jr4UtFyUtFW7GFy3CrWUCFg_yoW3ArbEkr W8uFWIg395ur409wsF9w1YvrW5KFWvgr4q9Fn7KFy3Way7Grn3Jw42yF1DJ34UXrs8Gr9r ZwsFyrZ3Zr4fujkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbc8FF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_JFI_Gr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr0_ Cr1l84ACjcxK6I8E87Iv67AKxVWxJr0_GcWl84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s 0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xII jxv20xvE14v26r1j6r18McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr0_Gr 1lF7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7MxkIecxEwVAFwVW8uwCF 04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r 18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jrv_JF1lIxkGc2Ij64vI r41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Jr0_Gr 1lIxAIcVCF04k26cxKx2IYs7xG6rW3Jr0E3s1lIxAIcVC2z280aVAFwI0_Jr0_Gr1lIxAI cVC2z280aVCY1x0267AKxVWUJVW8JbIYCTnIWIevJa73UjIFyTuYvjfU0VyxDUUUU X-Originating-IP: [124.16.138.128] X-CM-SenderInfo: pmld2xxhqjqxpvfd2hldfou0/ Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Fixes: 0a0c3b5a24bd ("Add new uio device for dynamic memory allocation") Signed-off-by: Jiasheng Jiang --- drivers/uio/uio_dmem_genirq.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/uio/uio_dmem_genirq.c b/drivers/uio/uio_dmem_genirq.c index 6b5cfa5b0673..570f5be64b46 100644 --- a/drivers/uio/uio_dmem_genirq.c +++ b/drivers/uio/uio_dmem_genirq.c @@ -188,7 +188,9 @@ static int uio_dmem_genirq_probe(struct platform_device *pdev) return -ENOMEM; } - dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); + ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); + if (ret) + return ret; priv->uioinfo = uioinfo; spin_lock_init(&priv->lock); -- 2.25.1