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From: haibo.chen@nxp.com
To: aisheng.dong@nxp.com, festevam@gmail.com, shawnguo@kernel.org,
	stefan@agner.ch, kernel@pengutronix.de, linus.walleij@linaro.org,
	s.hauer@pengutronix.de, linux-imx@nxp.com,
	christophe.jaillet@wanadoo.fr, dan.carpenter@oracle.com
Cc: linux-gpio@vger.kernel.org, haibo.chen@nxp.com
Subject: [PATCH v2] Revert "pinctrl: freescale: imx: Use 'devm_of_iomap()' to avoid a resource leak in case of error in 'imx_pinctrl_probe()'"
Date: Tue,  9 Jun 2020 11:27:03 +0800
Message-ID: <1591673223-1680-1-git-send-email-haibo.chen@nxp.com> (raw)

From: Haibo Chen <haibo.chen@nxp.com>

This reverts commit ba403242615c2c99e27af7984b1650771a2cc2c9.

After commit 26d8cde5260b ("pinctrl: freescale: imx: add shared
input select reg support"). i.MX7D has two iomux controllers
iomuxc and iomuxc-lpsr which share select_input register for
daisy chain settings.
If use 'devm_of_iomap()', when probe the iomuxc-lpsr, will call
devm_request_mem_region() for the region <0x30330000-0x3033ffff>
for the first time. Then, next time when probe the iomuxc, API
devm_platform_ioremap_resource() will also use the API
devm_request_mem_region() for the share region <0x30330000-0x3033ffff>
again, then cause issue, log like below:

[    0.179561] imx7d-pinctrl 302c0000.iomuxc-lpsr: initialized IMX pinctrl driver
[    0.191742] imx7d-pinctrl 30330000.pinctrl: can't request region for resource [mem 0x30330000-0x3033ffff]
[    0.191842] imx7d-pinctrl: probe of 30330000.pinctrl failed with error -16

Fixes: ba403242615c ("pinctrl: freescale: imx: Use 'devm_of_iomap()' to avoid a resource leak in case of error in 'imx_pinctrl_probe()'")
Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
Reviewed-by: Dong Aisheng <aisheng.dong@nxp.com>
---
 drivers/pinctrl/freescale/pinctrl-imx.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/pinctrl/freescale/pinctrl-imx.c b/drivers/pinctrl/freescale/pinctrl-imx.c
index cb7e0f08d2cf..1f81569c7ae3 100644
--- a/drivers/pinctrl/freescale/pinctrl-imx.c
+++ b/drivers/pinctrl/freescale/pinctrl-imx.c
@@ -824,13 +824,12 @@ int imx_pinctrl_probe(struct platform_device *pdev,
 				return -EINVAL;
 			}
 
-			ipctl->input_sel_base = devm_of_iomap(&pdev->dev, np,
-							      0, NULL);
+			ipctl->input_sel_base = of_iomap(np, 0);
 			of_node_put(np);
-			if (IS_ERR(ipctl->input_sel_base)) {
+			if (!ipctl->input_sel_base) {
 				dev_err(&pdev->dev,
 					"iomuxc input select base address not found\n");
-				return PTR_ERR(ipctl->input_sel_base);
+				return -ENOMEM;
 			}
 		}
 	}
-- 
2.17.1


             reply index

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-09  3:27 haibo.chen [this message]
2020-06-16  2:53 ` Aisheng Dong
2020-06-16 18:15   ` Andy Shevchenko
2020-06-17  1:14     ` Peng Fan
2020-06-17  2:53       ` Aisheng Dong
2020-06-17  2:56         ` Peng Fan
2020-06-17  2:43     ` Aisheng Dong
2020-06-16  8:21 ` Linus Walleij

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