linux-kernel - [PATCH] soc: imx: imx8m-blk-ctrl: Fix wrong check

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Date:   Tue, 13 Sep 2022 15:21:55 +0800
From:   Tang Bin <tangbin@...s.chinamobile.com>
To:     shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
        festevam@...il.com, linux-imx@....com
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Tang Bin <tangbin@...s.chinamobile.com>
Subject: [PATCH] soc: imx: imx8m-blk-ctrl: Fix wrong check

In the function imx8m_blk_ctrl_probe(),
dev_pm_domain_attach_by_name() may return NULL in some cases,
so IS_ERR() doesn't meet the requirements. Thus fix it.

Fixes: 2684ac05a8c4 ("soc: imx: add i.MX8M blk-ctrl driver")
Signed-off-by: Tang Bin <tangbin@...s.chinamobile.com>
---
 drivers/soc/imx/imx8m-blk-ctrl.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/soc/imx/imx8m-blk-ctrl.c b/drivers/soc/imx/imx8m-blk-ctrl.c
index ccd0577a7..98a1f2151 100644
--- a/drivers/soc/imx/imx8m-blk-ctrl.c
+++ b/drivers/soc/imx/imx8m-blk-ctrl.c
@@ -235,10 +235,10 @@ static int imx8m_blk_ctrl_probe(struct platform_device *pdev)
 
 		domain->power_dev =
 			dev_pm_domain_attach_by_name(dev, data->gpc_name);
-		if (IS_ERR(domain->power_dev)) {
+		if (IS_ERR_OR_NULL(domain->power_dev)) {
 			dev_err_probe(dev, PTR_ERR(domain->power_dev),
 				      "failed to attach power domain\n");
-			ret = PTR_ERR(domain->power_dev);
+			ret = PTR_ERR(domain->power_dev) ? : -ENODATA;
 			goto cleanup_pds;
 		}
 
-- 
2.20.1.windows.1