From patchwork Fri Mar 4 06:46:39 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiasheng Jiang X-Patchwork-Id: 548702 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 0796BC433EF for ; Fri, 4 Mar 2022 06:46:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234092AbiCDGrf (ORCPT ); Fri, 4 Mar 2022 01:47:35 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40634 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229889AbiCDGrd (ORCPT ); Fri, 4 Mar 2022 01:47:33 -0500 Received: from cstnet.cn (smtp84.cstnet.cn [159.226.251.84]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id C657218CC21; Thu, 3 Mar 2022 22:46:45 -0800 (PST) Received: from localhost.localdomain (unknown [124.16.138.126]) by APP-05 (Coremail) with SMTP id zQCowADHqPHQtSFiSwAcAg--.15700S2; Fri, 04 Mar 2022 14:46:41 +0800 (CST) From: Jiasheng Jiang To: broonie@kernel.org, michal.simek@xilinx.com Cc: linux-spi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Jiasheng Jiang Subject: [PATCH] spi: spi-zynq-qspi: Handle error for clk_enable Date: Fri, 4 Mar 2022 14:46:39 +0800 Message-Id: <20220304064639.416690-1-jiasheng@iscas.ac.cn> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-CM-TRANSID: zQCowADHqPHQtSFiSwAcAg--.15700S2 X-Coremail-Antispam: 1UD129KBjvdXoW7Xr47tF17AF47CryxZr1rtFb_yoWkGrg_Ca 17XrZIqrs8uw4xCF1xtr4DAFyUurs5Xr12q3Wvqay3trZxJrnFqrWDZrWUJ34fZw1UCrs3 Cr429340yr43CjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbzxFF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_tr0E3s1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j 6F4UJwA2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oV Cq3wAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0 I7IYx2IY67AKxVWUJVWUGwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r 4UM4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwCF04k20xvY0x0EwIxG rwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4 vE14v26r106r1rMI8E67AF67kF1VAFwI0_JF0_Jw1lIxkGc2Ij64vIr41lIxAIcVC0I7IY x2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Jr0_Gr1lIxAIcVCF04k26c xKx2IYs7xG6rW3Jr0E3s1lIxAIcVC2z280aVAFwI0_Jr0_Gr1lIxAIcVC2z280aVCY1x02 67AKxVW8JVW8JrUvcSsGvfC2KfnxnUUI43ZEXa7VUbrMaUUUUUU== X-Originating-IP: [124.16.138.126] X-CM-SenderInfo: pmld2xxhqjqxpvfd2hldfou0/ Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org As the potential failure of the clk_enable(), it should be better to check it and return error if fails. Fixes: 67dca5e580f1 ("spi: spi-mem: Add support for Zynq QSPI controller") Signed-off-by: Jiasheng Jiang --- drivers/spi/spi-zynq-qspi.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-zynq-qspi.c b/drivers/spi/spi-zynq-qspi.c index 78f31b61a2aa..77ea6b522348 100644 --- a/drivers/spi/spi-zynq-qspi.c +++ b/drivers/spi/spi-zynq-qspi.c @@ -379,12 +379,21 @@ static int zynq_qspi_setup_op(struct spi_device *spi) { struct spi_controller *ctlr = spi->master; struct zynq_qspi *qspi = spi_controller_get_devdata(ctlr); + int ret; if (ctlr->busy) return -EBUSY; - clk_enable(qspi->refclk); - clk_enable(qspi->pclk); + ret = clk_enable(qspi->refclk); + if (ret) + return ret; + + ret = clk_enable(qspi->pclk); + if (ret) { + clk_disable(qspi->refclk); + return ret; + } + zynq_qspi_write(qspi, ZYNQ_QSPI_ENABLE_OFFSET, ZYNQ_QSPI_ENABLE_ENABLE_MASK);