linux-kernel - Re: [PATCH v2] mfd: stmpe: Revert "Constify static struct resource"

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Date:   Fri, 5 Mar 2021 12:18:32 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Rikard Falkeborn <rikard.falkeborn@...il.com>
Cc:     Lee Jones <lee.jones@...aro.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] mfd: stmpe: Revert "Constify static struct resource"

On Fri, Mar 05, 2021 at 12:07:09AM +0100, Rikard Falkeborn wrote:
> In stmpe_devices_init(), the start and end field of these structs are
> modified, so they can not be const. Add a comment to those structs that
> lacked it to reduce the risk that this happens again.
> 
> This reverts commit 8d7b3a6dac4eae22c58b0853696cbd256966741b.

FWIW,
Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

> Fixes: 8d7b3a6dac4e ("mfd: stmpe: Constify static struct resource")
> Reported-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> Signed-off-by: Rikard Falkeborn <rikard.falkeborn@...il.com>
> ---
> Changes
> V1-V2: Add comments to the structs that they are dynamically modified
>        Rewrite commit message.
> 
> V1: https://lore.kernel.org/lkml/20210302234710.74455-1-rikard.falkeborn@gmail.com/
> 
>  drivers/mfd/stmpe.c | 14 +++++++++-----
>  1 file changed, 9 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/mfd/stmpe.c b/drivers/mfd/stmpe.c
> index 90f3292230c9..1dd39483e7c1 100644
> --- a/drivers/mfd/stmpe.c
> +++ b/drivers/mfd/stmpe.c
> @@ -312,7 +312,7 @@ EXPORT_SYMBOL_GPL(stmpe_set_altfunc);
>   * GPIO (all variants)
>   */
>  
> -static const struct resource stmpe_gpio_resources[] = {
> +static struct resource stmpe_gpio_resources[] = {
>  	/* Start and end filled dynamically */
>  	{
>  		.flags	= IORESOURCE_IRQ,
> @@ -336,7 +336,8 @@ static const struct mfd_cell stmpe_gpio_cell_noirq = {
>   * Keypad (1601, 2401, 2403)
>   */
>  
> -static const struct resource stmpe_keypad_resources[] = {
> +static struct resource stmpe_keypad_resources[] = {
> +	/* Start and end filled dynamically */
>  	{
>  		.name	= "KEYPAD",
>  		.flags	= IORESOURCE_IRQ,
> @@ -357,7 +358,8 @@ static const struct mfd_cell stmpe_keypad_cell = {
>  /*
>   * PWM (1601, 2401, 2403)
>   */
> -static const struct resource stmpe_pwm_resources[] = {
> +static struct resource stmpe_pwm_resources[] = {
> +	/* Start and end filled dynamically */
>  	{
>  		.name	= "PWM0",
>  		.flags	= IORESOURCE_IRQ,
> @@ -445,7 +447,8 @@ static struct stmpe_variant_info stmpe801_noirq = {
>   * Touchscreen (STMPE811 or STMPE610)
>   */
>  
> -static const struct resource stmpe_ts_resources[] = {
> +static struct resource stmpe_ts_resources[] = {
> +	/* Start and end filled dynamically */
>  	{
>  		.name	= "TOUCH_DET",
>  		.flags	= IORESOURCE_IRQ,
> @@ -467,7 +470,8 @@ static const struct mfd_cell stmpe_ts_cell = {
>   * ADC (STMPE811)
>   */
>  
> -static const struct resource stmpe_adc_resources[] = {
> +static struct resource stmpe_adc_resources[] = {
> +	/* Start and end filled dynamically */
>  	{
>  		.name	= "STMPE_TEMP_SENS",
>  		.flags	= IORESOURCE_IRQ,
> -- 
> 2.30.1
> 

-- 
With Best Regards,
Andy Shevchenko