[02/12] pinctrl: at91-pio4: account for const type of of_device_id.data

Message ID 1514899688-27844-3-git-send-email-Julia.Lawall@lip6.fr
State New
Headers show
Series
  • account for const type of of_device_id.data
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Commit Message

Julia Lawall Jan. 2, 2018, 1:27 p.m.
This driver creates a const structure that it stores in the data field
of an of_device_id array.

Adding const to the declaration of the location that receives the
const value from the data field ensures that the compiler will
continue to check that the value is not modified.  Furthermore, the
const-discarding cast on the extraction from the data field is no
longer needed.

Done using Coccinelle.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

---
 drivers/pinctrl/pinctrl-at91-pio4.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)


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Comments

Linus Walleij Jan. 3, 2018, 7:58 a.m. | #1
On Tue, Jan 2, 2018 at 2:27 PM, Julia Lawall <Julia.Lawall@lip6.fr> wrote:

> This driver creates a const structure that it stores in the data field
> of an of_device_id array.
>
> Adding const to the declaration of the location that receives the
> const value from the data field ensures that the compiler will
> continue to check that the value is not modified.  Furthermore, the
> const-discarding cast on the extraction from the data field is no
> longer needed.
>
> Done using Coccinelle.
>
> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

Patch applied.

Yours,
Linus Walleij
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Patch

diff -u -p a/drivers/pinctrl/pinctrl-at91-pio4.c b/drivers/pinctrl/pinctrl-at91-pio4.c
--- a/drivers/pinctrl/pinctrl-at91-pio4.c
+++ b/drivers/pinctrl/pinctrl-at91-pio4.c
@@ -910,7 +910,7 @@  static int atmel_pinctrl_probe(struct pl
 	int i, ret;
 	struct resource	*res;
 	struct atmel_pioctrl *atmel_pioctrl;
-	struct atmel_pioctrl_data *atmel_pioctrl_data;
+	const struct atmel_pioctrl_data *atmel_pioctrl_data;
 
 	atmel_pioctrl = devm_kzalloc(dev, sizeof(*atmel_pioctrl), GFP_KERNEL);
 	if (!atmel_pioctrl)
@@ -924,7 +924,7 @@  static int atmel_pinctrl_probe(struct pl
 		dev_err(dev, "unknown compatible string\n");
 		return -ENODEV;
 	}
-	atmel_pioctrl_data = (struct atmel_pioctrl_data *)match->data;
+	atmel_pioctrl_data = match->data;
 	atmel_pioctrl->nbanks = atmel_pioctrl_data->nbanks;
 	atmel_pioctrl->npins = atmel_pioctrl->nbanks * ATMEL_PIO_NPINS_PER_BANK;