Re: [PATCH] gpiolib: demote the hogging log messages to debug

[Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>]

On Mon, Jun 05, 2023 at 02:52:48PM +0200, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
> 
> Drivers should be silent when they work correctly. There's no reason to
> emit info messages when GPIO lines are hogged. Demote the message to
> debug.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>

> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
> Suggested-by: Kent Gibson <warthog618@xxxxxxxxx>
> ---
>  drivers/gpio/gpiolib.c |  2 +-
>  drivers/of/unittest.c  | 16 ++++++++--------
>  2 files changed, 9 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
> index a7220e04a93e..e4515bda8915 100644
> --- a/drivers/gpio/gpiolib.c
> +++ b/drivers/gpio/gpiolib.c
> @@ -4243,7 +4243,7 @@ int gpiod_hog(struct gpio_desc *desc, const char *name,
>  	/* Mark GPIO as hogged so it can be identified and removed later */
>  	set_bit(FLAG_IS_HOGGED, &desc->flags);
>  
> -	gpiod_info(desc, "hogged as %s%s\n",
> +	gpiod_dbg(desc, "hogged as %s%s\n",
>  		(dflags & GPIOD_FLAGS_BIT_DIR_OUT) ? "output" : "input",
>  		(dflags & GPIOD_FLAGS_BIT_DIR_OUT) ?
>  		  (dflags & GPIOD_FLAGS_BIT_DIR_VAL) ? "/high" : "/low" : "");
> diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
> index 2191c0136531..0060334a98a7 100644
> --- a/drivers/of/unittest.c
> +++ b/drivers/of/unittest.c
> @@ -1849,19 +1849,19 @@ static void __init of_unittest_overlay_gpio(void)
>  	 * driver is registered
>  	 */
>  
> -	EXPECT_BEGIN(KERN_INFO,
> +	EXPECT_BEGIN(KERN_DEBUG,
>  		     "gpio-<<int>> (line-B-input): hogged as input\n");
>  
> -	EXPECT_BEGIN(KERN_INFO,
> +	EXPECT_BEGIN(KERN_DEBUG,
>  		     "gpio-<<int>> (line-A-input): hogged as input\n");
>  
>  	ret = platform_driver_register(&unittest_gpio_driver);
>  	if (unittest(ret == 0, "could not register unittest gpio driver\n"))
>  		return;
>  
> -	EXPECT_END(KERN_INFO,
> +	EXPECT_END(KERN_DEBUG,
>  		   "gpio-<<int>> (line-A-input): hogged as input\n");
> -	EXPECT_END(KERN_INFO,
> +	EXPECT_END(KERN_DEBUG,
>  		   "gpio-<<int>> (line-B-input): hogged as input\n");
>  
>  	unittest(probe_pass_count + 2 == unittest_gpio_probe_pass_count,
> @@ -1888,7 +1888,7 @@ static void __init of_unittest_overlay_gpio(void)
>  	probe_pass_count = unittest_gpio_probe_pass_count;
>  	chip_request_count = unittest_gpio_chip_request_count;
>  
> -	EXPECT_BEGIN(KERN_INFO,
> +	EXPECT_BEGIN(KERN_DEBUG,
>  		     "gpio-<<int>> (line-D-input): hogged as input\n");
>  
>  	/* overlay_gpio_03 contains gpio node and child gpio hog node */
> @@ -1896,7 +1896,7 @@ static void __init of_unittest_overlay_gpio(void)
>  	unittest(overlay_data_apply("overlay_gpio_03", NULL),
>  		 "Adding overlay 'overlay_gpio_03' failed\n");
>  
> -	EXPECT_END(KERN_INFO,
> +	EXPECT_END(KERN_DEBUG,
>  		   "gpio-<<int>> (line-D-input): hogged as input\n");
>  
>  	unittest(probe_pass_count + 1 == unittest_gpio_probe_pass_count,
> @@ -1935,7 +1935,7 @@ static void __init of_unittest_overlay_gpio(void)
>  	 *   - processing gpio for overlay_gpio_04b
>  	 */
>  
> -	EXPECT_BEGIN(KERN_INFO,
> +	EXPECT_BEGIN(KERN_DEBUG,
>  		     "gpio-<<int>> (line-C-input): hogged as input\n");
>  
>  	/* overlay_gpio_04b contains child gpio hog node */
> @@ -1943,7 +1943,7 @@ static void __init of_unittest_overlay_gpio(void)
>  	unittest(overlay_data_apply("overlay_gpio_04b", NULL),
>  		 "Adding overlay 'overlay_gpio_04b' failed\n");
>  
> -	EXPECT_END(KERN_INFO,
> +	EXPECT_END(KERN_DEBUG,
>  		   "gpio-<<int>> (line-C-input): hogged as input\n");
>  
>  	unittest(chip_request_count + 1 == unittest_gpio_chip_request_count,
> -- 
> 2.39.2
> 

-- 
With Best Regards,
Andy Shevchenko