linux-kernel - [PATCH] spi: spi-at91-usart: Fix wrong goto jump label when spi_alloc

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Message-Id: <1623165248-24038-1-git-send-email-zpershuai@gmail.com>
Date:   Tue,  8 Jun 2021 23:14:07 +0800
From:   zpershuai <zpershuai@...il.com>
To:     Radu Pirea <radu_nicolae.pirea@....ro>,
        Mark Brown <broonie@...nel.org>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Ludovic Desroches <ludovic.desroches@...rochip.com>,
        linux-spi@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Cc:     zpershuai <zpershuai@...il.com>
Subject: [PATCH] spi: spi-at91-usart: Fix wrong goto jump label when spi_alloc_master() returns error.

When spi_alloc_master() returns null pointer, it’s no need to use
spi_master_put() to release the memory, although spi_master_put()
function has null pointer checks.

Signed-off-by: zpershuai <zpershuai@...il.com>
---
 drivers/spi/spi-at91-usart.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-at91-usart.c b/drivers/spi/spi-at91-usart.c
index 8c83526..c8136dc 100644
--- a/drivers/spi/spi-at91-usart.c
+++ b/drivers/spi/spi-at91-usart.c
@@ -533,8 +533,10 @@ static int at91_usart_spi_probe(struct platform_device *pdev)
 
 	ret = -ENOMEM;
 	controller = spi_alloc_master(&pdev->dev, sizeof(*aus));
-	if (!controller)
-		goto at91_usart_spi_probe_fail;
+	if (!controller) {
+		dev_err(&pdev->dev, "Error allocating SPI controller\n");
+		return -ENOMEM;
+	}
 
 	ret = at91_usart_gpio_setup(pdev);
 	if (ret)
-- 
2.7.4