linux-kernel - Re: [PATCH] nvmem: switch to simpler IDA interface

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Date:   Fri, 11 Sep 2020 13:04:40 +0100
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     Bartosz Golaszewski <brgl@...ev.pl>
Cc:     linux-kernel@...r.kernel.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: Re: [PATCH] nvmem: switch to simpler IDA interface



On 08/09/2020 14:27, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bgolaszewski@...libre.com>
> 
> We don't need to specify any ranges when allocating IDs so we can switch
> to ida_alloc() and ida_free() instead of the ida_simple_ counterparts.
> 
> ida_simple_get(ida, 0, 0, gfp) is equivalent to
> ida_alloc_range(ida, 0, UINT_MAX, gfp) which is equivalent to
> ida_alloc(ida, gfp). Note: IDR will never actually allocate an ID
> larger than INT_MAX.
> 
> Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
> ---
>   drivers/nvmem/core.c | 6 +++---
>   1 file changed, 3 insertions(+), 3 deletions(-)

thanks Applied!

--srini
> 
> diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
> index 6cd3edb2eaf6..cd332d711dd1 100644
> --- a/drivers/nvmem/core.c
> +++ b/drivers/nvmem/core.c
> @@ -321,7 +321,7 @@ static void nvmem_release(struct device *dev)
>   {
>   	struct nvmem_device *nvmem = to_nvmem_device(dev);
>   
> -	ida_simple_remove(&nvmem_ida, nvmem->id);
> +	ida_free(&nvmem_ida, nvmem->id);
>   	gpiod_put(nvmem->wp_gpio);
>   	kfree(nvmem);
>   }
> @@ -596,7 +596,7 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config)
>   	if (!nvmem)
>   		return ERR_PTR(-ENOMEM);
>   
> -	rval  = ida_simple_get(&nvmem_ida, 0, 0, GFP_KERNEL);
> +	rval  = ida_alloc(&nvmem_ida, GFP_KERNEL);
>   	if (rval < 0) {
>   		kfree(nvmem);
>   		return ERR_PTR(rval);
> @@ -608,7 +608,7 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config)
>   		nvmem->wp_gpio = gpiod_get_optional(config->dev, "wp",
>   						    GPIOD_OUT_HIGH);
>   	if (IS_ERR(nvmem->wp_gpio)) {
> -		ida_simple_remove(&nvmem_ida, nvmem->id);
> +		ida_free(&nvmem_ida, nvmem->id);
>   		rval = PTR_ERR(nvmem->wp_gpio);
>   		kfree(nvmem);
>   		return ERR_PTR(rval);
>