linux-kernel - [PATCH v2] usb: bdc: Fix the return value and remove duplicate error message

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Message-Id: <20200928120051.21748-1-tangbin@cmss.chinamobile.com>
Date:   Mon, 28 Sep 2020 20:00:51 +0800
From:   Tang Bin <tangbin@...s.chinamobile.com>
To:     f.fainelli@...il.com, balbi@...nel.org, gregkh@...uxfoundation.org,
        chunfeng.yun@...iatek.com
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Tang Bin <tangbin@...s.chinamobile.com>,
        Zhang Shengju <zhangshengju@...s.chinamobile.com>
Subject: [PATCH v2] usb: bdc: Fix the return value and remove duplicate error message

When call function devm_platform_ioremap_resource(), we should use
IS_ERR() to check the return value and return PTR_ERR() if failed,
and it can print an error message itself if failed. So remove the
redundant dev_err() in this place.

Signed-off-by: Zhang Shengju <zhangshengju@...s.chinamobile.com>
Signed-off-by: Tang Bin <tangbin@...s.chinamobile.com>
---
Changes from v1
 - fix the subject and commit message
 - fix the code of right return if failed
---
 drivers/usb/gadget/udc/bdc/bdc_core.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/gadget/udc/bdc/bdc_core.c b/drivers/usb/gadget/udc/bdc/bdc_core.c
index 02a3a7746..70ff31bc8 100644
--- a/drivers/usb/gadget/udc/bdc/bdc_core.c
+++ b/drivers/usb/gadget/udc/bdc/bdc_core.c
@@ -508,10 +508,9 @@ static int bdc_probe(struct platform_device *pdev)
 	bdc->clk = clk;
 
 	bdc->regs = devm_platform_ioremap_resource(pdev, 0);
-	if (IS_ERR(bdc->regs)) {
-		dev_err(dev, "ioremap error\n");
-		return -ENOMEM;
-	}
+	if (IS_ERR(bdc->regs))
+		return PTR_ERR(bdc->regs);
+
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0)
 		return irq;
-- 
2.20.1.windows.1