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 X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 10846C28CC5 for ; Mon, 1 Mar 2021 22:42:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EE87360230 for ; Mon, 1 Mar 2021 22:42:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245453AbhCAWfH (ORCPT ); Mon, 1 Mar 2021 17:35:07 -0500 Received: from mail.kernel.org ([198.145.29.99]:59902 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238028AbhCARhy (ORCPT ); Mon, 1 Mar 2021 12:37:54 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 0D7E6650AD; Mon, 1 Mar 2021 16:54:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1614617697; bh=/PGZx+z/3VG5q3Lq7C3W006OXAOObkYmHTYq5cNieg4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BPMY+kQRbopY7Z3WllQxtbemA4M6VxEHFKRZ2/r83ZZEn8qivZvp2VUshL5w4w5Kg GuzrlO47qZ+bS6gXy/HiB3B+IMXw7pRk8WZ/G7NruKVhLXNJdSPAulXx3fLgMdNoCp fQGSg5Rfv/srCPQnZXonQ19haLekaHMgJHZ1qDt4= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Pratyush Yadav , Mark Brown , Sasha Levin Subject: [PATCH 5.4 135/340] spi: cadence-quadspi: Abort read if dummy cycles required are too many Date: Mon, 1 Mar 2021 17:11:19 +0100 Message-Id: <20210301161054.956932157@linuxfoundation.org> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210301161048.294656001@linuxfoundation.org> References: <20210301161048.294656001@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Pratyush Yadav [ Upstream commit ceeda328edeeeeac7579e9dbf0610785a3b83d39 ] The controller can only support up to 31 dummy cycles. If the command requires more it falls back to using 31. This command is likely to fail because the correct number of cycles are not waited upon. Rather than silently issuing an incorrect command, fail loudly so the caller can get a chance to find out the command can't be supported by the controller. Fixes: 140623410536 ("mtd: spi-nor: Add driver for Cadence Quad SPI Flash Controller") Signed-off-by: Pratyush Yadav Link: https://lore.kernel.org/r/20201222184425.7028-3-p.yadav@ti.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- drivers/mtd/spi-nor/cadence-quadspi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mtd/spi-nor/cadence-quadspi.c b/drivers/mtd/spi-nor/cadence-quadspi.c index 7bef63947b29f..97a5e1eaeefdf 100644 --- a/drivers/mtd/spi-nor/cadence-quadspi.c +++ b/drivers/mtd/spi-nor/cadence-quadspi.c @@ -475,7 +475,7 @@ static int cqspi_read_setup(struct spi_nor *nor) /* Setup dummy clock cycles */ dummy_clk = nor->read_dummy; if (dummy_clk > CQSPI_DUMMY_CLKS_MAX) - dummy_clk = CQSPI_DUMMY_CLKS_MAX; + return -EOPNOTSUPP; if (dummy_clk / 8) { reg |= (1 << CQSPI_REG_RD_INSTR_MODE_EN_LSB); -- 2.27.0