diff mbox series

[v3] spi: fsl: simplify error path in of_fsl_spi_probe()

Message ID 2a4a7e11b37cfa0558d68f0d35e90d6da858b059.1579017697.git.christophe.leroy@c-s.fr (mailing list archive)
State Accepted
Commit 2f3d8035b0f7a8e781b60e0884551dd8a1173a75
Headers show
Series [v3] spi: fsl: simplify error path in of_fsl_spi_probe() | expand

Commit Message

Christophe Leroy Jan. 14, 2020, 4:02 p.m. UTC
No need to 'goto err;' for just doing a return.
return directly from where the error happens.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
v3: rebase on today's spi/for-next and using PTR_ERR_OR_ZERO() in one place.
---
 drivers/spi/spi-fsl-spi.c | 27 ++++++++-------------------
 1 file changed, 8 insertions(+), 19 deletions(-)

Comments

Joakim Tjernlund Jan. 14, 2020, 4:26 p.m. UTC | #1
On Tue, 2020-01-14 at 16:02 +0000, Christophe Leroy wrote:
> CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe.
> 
> 
> No need to 'goto err;' for just doing a return.
> return directly from where the error happens.
> 
> Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
> ---
> v3: rebase on today's spi/for-next and using PTR_ERR_OR_ZERO() in one place.
> ---
>  drivers/spi/spi-fsl-spi.c | 27 ++++++++-------------------
>  1 file changed, 8 insertions(+), 19 deletions(-)
> 
> diff --git a/drivers/spi/spi-fsl-spi.c b/drivers/spi/spi-fsl-spi.c
> index fb4159ad6bf6..3b81772fea0d 100644
> --- a/drivers/spi/spi-fsl-spi.c
> +++ b/drivers/spi/spi-fsl-spi.c
> @@ -706,8 +706,8 @@ static int of_fsl_spi_probe(struct platform_device *ofdev)
>         struct device_node *np = ofdev->dev.of_node;
>         struct spi_master *master;
>         struct resource mem;
> -       int irq = 0, type;
> -       int ret = -ENOMEM;
> +       int irq, type;
> +       int ret;
> 
>         ret = of_mpc8xxx_spi_probe(ofdev);
>         if (ret)
> @@ -722,10 +722,8 @@ static int of_fsl_spi_probe(struct platform_device *ofdev)
> 
>                 if (spisel_boot) {
>                         pinfo->immr_spi_cs = ioremap(get_immrbase() + IMMR_SPI_CS_OFFSET, 4);
> -                       if (!pinfo->immr_spi_cs) {
> -                               ret = -ENOMEM;
> -                               goto err;
> -                       }
> +                       if (!pinfo->immr_spi_cs)
> +                               return -ENOMEM;
>                 }
>  #endif
>                 /*
> @@ -744,24 +742,15 @@ static int of_fsl_spi_probe(struct platform_device *ofdev)
> 
>         ret = of_address_to_resource(np, 0, &mem);
>         if (ret)
> -               goto err;
> +               return ret;
> 
>         irq = platform_get_irq(ofdev, 0);
> -       if (irq < 0) {
> -               ret = irq;
> -               goto err;
> -       }
> +       if (irq < 0)
> +               return irq;
> 
>         master = fsl_spi_probe(dev, &mem, irq);
> -       if (IS_ERR(master)) {
> -               ret = PTR_ERR(master);
> -               goto err;
> -       }
> -

Don't you need to "undo" ioremap, irq etc. in case of later errors?

> -       return 0;
> 
> -err:
> -       return ret;
> +       return PTR_ERR_OR_ZERO(master);
>  }
> 
>  static int of_fsl_spi_remove(struct platform_device *ofdev)
> --
> 2.13.3
>
Mark Brown Jan. 14, 2020, 4:57 p.m. UTC | #2
On Tue, Jan 14, 2020 at 04:26:18PM +0000, Joakim Tjernlund wrote:

> Don't you need to "undo" ioremap, irq etc. in case of later errors?

Better, convert to devm_
diff mbox series

Patch

diff --git a/drivers/spi/spi-fsl-spi.c b/drivers/spi/spi-fsl-spi.c
index fb4159ad6bf6..3b81772fea0d 100644
--- a/drivers/spi/spi-fsl-spi.c
+++ b/drivers/spi/spi-fsl-spi.c
@@ -706,8 +706,8 @@  static int of_fsl_spi_probe(struct platform_device *ofdev)
 	struct device_node *np = ofdev->dev.of_node;
 	struct spi_master *master;
 	struct resource mem;
-	int irq = 0, type;
-	int ret = -ENOMEM;
+	int irq, type;
+	int ret;
 
 	ret = of_mpc8xxx_spi_probe(ofdev);
 	if (ret)
@@ -722,10 +722,8 @@  static int of_fsl_spi_probe(struct platform_device *ofdev)
 
 		if (spisel_boot) {
 			pinfo->immr_spi_cs = ioremap(get_immrbase() + IMMR_SPI_CS_OFFSET, 4);
-			if (!pinfo->immr_spi_cs) {
-				ret = -ENOMEM;
-				goto err;
-			}
+			if (!pinfo->immr_spi_cs)
+				return -ENOMEM;
 		}
 #endif
 		/*
@@ -744,24 +742,15 @@  static int of_fsl_spi_probe(struct platform_device *ofdev)
 
 	ret = of_address_to_resource(np, 0, &mem);
 	if (ret)
-		goto err;
+		return ret;
 
 	irq = platform_get_irq(ofdev, 0);
-	if (irq < 0) {
-		ret = irq;
-		goto err;
-	}
+	if (irq < 0)
+		return irq;
 
 	master = fsl_spi_probe(dev, &mem, irq);
-	if (IS_ERR(master)) {
-		ret = PTR_ERR(master);
-		goto err;
-	}
-
-	return 0;
 
-err:
-	return ret;
+	return PTR_ERR_OR_ZERO(master);
 }
 
 static int of_fsl_spi_remove(struct platform_device *ofdev)