diff mbox series

[v2,08/10] pinctrl: sppctl: use gpiochip_dup_line_label()

Message ID 20231130134630.18198-9-brgl@bgdev.pl
State New
Headers show
Series gpio/pinctrl: replace gpiochip_is_requested() with a safer interface | expand

Commit Message

Bartosz Golaszewski Nov. 30, 2023, 1:46 p.m. UTC 
From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Use the new gpiochip_dup_line_label() helper to safely retrieve the
descriptor label.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
 drivers/pinctrl/sunplus/sppctl.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

Comments

Andy Shevchenko Nov. 30, 2023, 4:37 p.m. UTC | #1 
On Thu, Nov 30, 2023 at 02:46:28PM +0100, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
> 
> Use the new gpiochip_dup_line_label() helper to safely retrieve the
> descriptor label.

...

>  	for (i = 0; i < chip->ngpio; i++) {
> -		label = gpiochip_is_requested(chip, i);
> -		if (!label)
> -			label = "";
> +		char *label __free(kfree) = gpiochip_dup_line_label(chip, i);
> +		if (IS_ERR(label))
> +			continue;
>  
>  		seq_printf(s, " gpio-%03d (%-16.16s | %-16.16s)", i + chip->base,
> -			   chip->names[i], label);
> +			   chip->names[i], label ?: "");

So, as it's non-ABI change, we still can use "reserved" word here as well
("Unrequested" or whatever.)
Bartosz Golaszewski Nov. 30, 2023, 5:43 p.m. UTC | #2 
On Thu, Nov 30, 2023 at 5:37 PM Andy Shevchenko
<andriy.shevchenko@linux.intel.com> wrote:
>
> On Thu, Nov 30, 2023 at 02:46:28PM +0100, Bartosz Golaszewski wrote:
> > From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
> >
> > Use the new gpiochip_dup_line_label() helper to safely retrieve the
> > descriptor label.
>
> ...
>
> >       for (i = 0; i < chip->ngpio; i++) {
> > -             label = gpiochip_is_requested(chip, i);
> > -             if (!label)
> > -                     label = "";
> > +             char *label __free(kfree) = gpiochip_dup_line_label(chip, i);
> > +             if (IS_ERR(label))
> > +                     continue;
> >
> >               seq_printf(s, " gpio-%03d (%-16.16s | %-16.16s)", i + chip->base,
> > -                        chip->names[i], label);
> > +                        chip->names[i], label ?: "");
>
> So, as it's non-ABI change, we still can use "reserved" word here as well
> ("Unrequested" or whatever.)
>

See my other comment regarding the changes in output.

Bart

> --
> With Best Regards,
> Andy Shevchenko
>
>
diff mbox series

Patch

diff --git a/drivers/pinctrl/sunplus/sppctl.c b/drivers/pinctrl/sunplus/sppctl.c
index bb5ef391dbe4..ae156f779a16 100644
--- a/drivers/pinctrl/sunplus/sppctl.c
+++ b/drivers/pinctrl/sunplus/sppctl.c
@@ -4,6 +4,7 @@ 
  * Copyright (C) Sunplus Tech / Tibbo Tech.
  */
 
+#include <linux/cleanup.h>
 #include <linux/bitfield.h>
 #include <linux/device.h>
 #include <linux/err.h>
@@ -500,16 +501,15 @@  static int sppctl_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
 
 static void sppctl_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
 {
-	const char *label;
 	int i;
 
 	for (i = 0; i < chip->ngpio; i++) {
-		label = gpiochip_is_requested(chip, i);
-		if (!label)
-			label = "";
+		char *label __free(kfree) = gpiochip_dup_line_label(chip, i);
+		if (IS_ERR(label))
+			continue;
 
 		seq_printf(s, " gpio-%03d (%-16.16s | %-16.16s)", i + chip->base,
-			   chip->names[i], label);
+			   chip->names[i], label ?: "");
 		seq_printf(s, " %c", sppctl_gpio_get_direction(chip, i) ? 'I' : 'O');
 		seq_printf(s, ":%d", sppctl_gpio_get(chip, i));
 		seq_printf(s, " %s", sppctl_first_get(chip, i) ? "gpi" : "mux");