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Wed, 15 Apr 2020 17:58:41 +0200 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id E24D2100039; Wed, 15 Apr 2020 17:58:40 +0200 (CEST) Received: from Webmail-eu.st.com (sfhdag6node2.st.com [10.75.127.17]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id CDF302AF597; Wed, 15 Apr 2020 17:58:40 +0200 (CEST) Received: from localhost (10.75.127.49) by SFHDAG6NODE2.st.com (10.75.127.17) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Wed, 15 Apr 2020 17:58:40 +0200 From: Christophe Kerello To: , , , , , , Subject: [PATCH v2 04/12] mtd: rawnand: stm32_fmc2: manage all errors cases at probe time Date: Wed, 15 Apr 2020 17:57:28 +0200 Message-ID: <1586966256-29548-5-git-send-email-christophe.kerello@st.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1586966256-29548-1-git-send-email-christophe.kerello@st.com> References: <1586966256-29548-1-git-send-email-christophe.kerello@st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.49] X-ClientProxiedBy: SFHDAG6NODE3.st.com (10.75.127.18) To SFHDAG6NODE2.st.com (10.75.127.17) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138, 18.0.676 definitions=2020-04-15_05:2020-04-14, 2020-04-15 signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200415_085851_857121_C97F9775 X-CRM114-Status: GOOD ( 15.94 ) X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: marex@denx.de, devicetree@vger.kernel.org, Christophe Kerello , linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org, linux-stm32@st-md-mailman.stormreply.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org This patch defers its probe when the expected reset control is not yet ready. This patch also handles properly all errors cases at probe time. Signed-off-by: Christophe Kerello --- drivers/mtd/nand/raw/stm32_fmc2_nand.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/drivers/mtd/nand/raw/stm32_fmc2_nand.c b/drivers/mtd/nand/raw/stm32_fmc2_nand.c index b6d45cd..0a96797 100644 --- a/drivers/mtd/nand/raw/stm32_fmc2_nand.c +++ b/drivers/mtd/nand/raw/stm32_fmc2_nand.c @@ -1967,7 +1967,11 @@ static int stm32_fmc2_probe(struct platform_device *pdev) } rstc = devm_reset_control_get(dev, NULL); - if (!IS_ERR(rstc)) { + if (IS_ERR(rstc)) { + ret = PTR_ERR(rstc); + if (ret == -EPROBE_DEFER) + goto err_clk_disable; + } else { reset_control_assert(rstc); reset_control_deassert(rstc); } @@ -1975,7 +1979,7 @@ static int stm32_fmc2_probe(struct platform_device *pdev) /* DMA setup */ ret = stm32_fmc2_dma_setup(fmc2); if (ret) - return ret; + goto err_dma_setup; /* FMC2 init routine */ stm32_fmc2_init(fmc2); @@ -1997,7 +2001,7 @@ static int stm32_fmc2_probe(struct platform_device *pdev) /* Scan to find existence of the device */ ret = nand_scan(chip, nand->ncs); if (ret) - goto err_scan; + goto err_dma_setup; ret = mtd_device_register(mtd, NULL, 0); if (ret) @@ -2010,7 +2014,7 @@ static int stm32_fmc2_probe(struct platform_device *pdev) err_device_register: nand_cleanup(chip); -err_scan: +err_dma_setup: if (fmc2->dma_ecc_ch) dma_release_channel(fmc2->dma_ecc_ch); if (fmc2->dma_tx_ch) @@ -2021,6 +2025,7 @@ static int stm32_fmc2_probe(struct platform_device *pdev) sg_free_table(&fmc2->dma_data_sg); sg_free_table(&fmc2->dma_ecc_sg); +err_clk_disable: clk_disable_unprepare(fmc2->clk); return ret; -- 1.9.1 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/