linux-kernel - Re: [PATCH] ACPI: fix test for hex digit.

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Date:	Wed, 30 Jul 2014 13:00:12 -0700
From:	Joe Perches <joe@...ches.com>
To:	Arjun Sreedharan <arjun024@...il.com>
Cc:	rjw@...ysocki.net, lenb@...nel.org, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ACPI: fix test for hex digit.

On Thu, 2014-07-31 at 01:22 +0530, Arjun Sreedharan wrote:
> decimal 0 is ascii for NULL. Hex digit matching should be from '0'
> (decimal 30 of ascii) to '9' and 'A' to 'F'.
> Unfixed version returns true for #,$,%,& etc.
[]
> diff --git a/drivers/acpi/acpi_pnp.c b/drivers/acpi/acpi_pnp.c
[]
> @@ -322,7 +322,7 @@ static const struct acpi_device_id acpi_pnp_device_ids[] = {
>  
>  static bool is_hex_digit(char c)
>  {
> -	return (c >= 0 && c <= '9') || (c >= 'A' && c <= 'F');
> +	return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'F');
>  }

Maybe delete this and do s/is_hex_digit/isxdigit/ ?


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