linux-kernel - [PATCH AUTOSEL 5.4 196/350] spi: sifive: disable clk when probe fails and remove

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Message-Id: <20191210210735.9077-157-sashal@kernel.org>
Date:   Tue, 10 Dec 2019 16:05:01 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Chuhong Yuan <hslester96@...il.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>, linux-spi@...r.kernel.org,
        linux-riscv@...ts.infradead.org
Subject: [PATCH AUTOSEL 5.4 196/350] spi: sifive: disable clk when probe fails and remove

From: Chuhong Yuan <hslester96@...il.com>

[ Upstream commit a725272bda77e61c1b4de85c7b0c875b2ea639b6 ]

The driver forgets to disable and unprepare clk when probe fails and
remove.
Add the calls to fix the problem.

Signed-off-by: Chuhong Yuan <hslester96@...il.com>
Reviewed-by: Palmer Dabbelt <palmer@...belt.com>
Link: https://lore.kernel.org/r/20191101121745.13413-1-hslester96@gmail.com
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/spi/spi-sifive.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/spi/spi-sifive.c b/drivers/spi/spi-sifive.c
index 35254bdc42c48..f7c1e20432e07 100644
--- a/drivers/spi/spi-sifive.c
+++ b/drivers/spi/spi-sifive.c
@@ -357,14 +357,14 @@ static int sifive_spi_probe(struct platform_device *pdev)
 	if (!cs_bits) {
 		dev_err(&pdev->dev, "Could not auto probe CS lines\n");
 		ret = -EINVAL;
-		goto put_master;
+		goto disable_clk;
 	}
 
 	num_cs = ilog2(cs_bits) + 1;
 	if (num_cs > SIFIVE_SPI_MAX_CS) {
 		dev_err(&pdev->dev, "Invalid number of spi slaves\n");
 		ret = -EINVAL;
-		goto put_master;
+		goto disable_clk;
 	}
 
 	/* Define our master */
@@ -393,7 +393,7 @@ static int sifive_spi_probe(struct platform_device *pdev)
 			       dev_name(&pdev->dev), spi);
 	if (ret) {
 		dev_err(&pdev->dev, "Unable to bind to interrupt\n");
-		goto put_master;
+		goto disable_clk;
 	}
 
 	dev_info(&pdev->dev, "mapped; irq=%d, cs=%d\n",
@@ -402,11 +402,13 @@ static int sifive_spi_probe(struct platform_device *pdev)
 	ret = devm_spi_register_master(&pdev->dev, master);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "spi_register_master failed\n");
-		goto put_master;
+		goto disable_clk;
 	}
 
 	return 0;
 
+disable_clk:
+	clk_disable_unprepare(spi->clk);
 put_master:
 	spi_master_put(master);
 
@@ -420,6 +422,7 @@ static int sifive_spi_remove(struct platform_device *pdev)
 
 	/* Disable all the interrupts just in case */
 	sifive_spi_write(spi, SIFIVE_SPI_REG_IE, 0);
+	clk_disable_unprepare(spi->clk);
 
 	return 0;
 }
-- 
2.20.1