[PATCH] spi: sifive: disable clk when probe fails and remove

[PATCH] spi: sifive: disable clk when probe fails and remove

[Chuhong Yuan]

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@gmail.com>
---
 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 35254bdc42c4..f7c1e20432e0 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;
 }
-- 
2.23.0


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Re: [PATCH] spi: sifive: disable clk when probe fails and remove

[Palmer Dabbelt]

On Fri, 01 Nov 2019 05:17:45 PDT (-0700), hslester96@gmail.com wrote:
> 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@gmail.com>
> ---
>  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 35254bdc42c4..f7c1e20432e0 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;
>  }

Reviewed-by: Palmer Dabbelt <palmer@dabbelt.com>

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Re: [PATCH] spi: sifive: disable clk when probe fails and remove

[Mark Brown]

[-- Attachment #1.1: Type: text/plain, Size: 531 bytes --]

On Fri, Nov 01, 2019 at 04:07:29PM -0700, Palmer Dabbelt wrote:
> On Fri, 01 Nov 2019 05:17:45 PDT (-0700), hslester96@gmail.com wrote:
> > The driver forgets to disable and unprepare clk when probe fails and
> > remove.
> > Add the calls to fix the problem.

> Reviewed-by: Palmer Dabbelt <palmer@dabbelt.com>

Please delete unneeded context from mails when replying.  Doing this
makes it much easier to find your reply in the message, helping ensure
it won't be missed by people scrolling through the irrelevant quoted
material.

[-- Attachment #1.2: signature.asc --]
[-- Type: application/pgp-signature, Size: 488 bytes --]

[-- Attachment #2: Type: text/plain, Size: 161 bytes --]

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Applied "spi: sifive: disable clk when probe fails and remove" to the spi tree

[Mark Brown]

The patch

   spi: sifive: disable clk when probe fails and remove

has been applied to the spi tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-5.4

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

From a725272bda77e61c1b4de85c7b0c875b2ea639b6 Mon Sep 17 00:00:00 2001
From: Chuhong Yuan <hslester96@gmail.com>
Date: Fri, 1 Nov 2019 20:17:45 +0800
Subject: [PATCH] spi: sifive: disable clk when probe fails and remove

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@gmail.com>
Reviewed-by: Palmer Dabbelt <palmer@dabbelt.com>
Link: https://lore.kernel.org/r/20191101121745.13413-1-hslester96@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.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 35254bdc42c4..f7c1e20432e0 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


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