Re: [PATCH] platform/x86: hp-bioscfg: Support allocations of larger data

[Mario Limonciello <mario.limonciello@amd.com>]

On 2/23/2026 10:32 AM, Mario Limonciello wrote:
> Some systems have much larger amounts of enumeration attributes
> than have been previously encountered. This can lead to page allocation
> failures when using kcalloc().  Switch over to using kvcalloc() to
> allow larger allocations.
> 
> Fixes: 6b2770bfd6f92 ("platform/x86: hp-bioscfg: enum-attributes")
> Cc: stable@vger.kernel.org
> Reported-by: Paul Kerry <p.kerry@sheffield.ac.uk>
> Closes: https://bugs.debian.org/1127612
> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>

Add a tag for Paul's test 
(https://lore.kernel.org/platform-driver-x86/b2535142-aaff-4eb0-87bd-34c9f8f16f07@sheffield.ac.uk/T/#m5ae303266e0685309c19c67d2e320a6d42579cd5)

Tested-by: Paul Kerry <p.kerry@sheffield.ac.uk>

> ---
>   drivers/platform/x86/hp/hp-bioscfg/enum-attributes.c | 7 +++++--
>   1 file changed, 5 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/platform/x86/hp/hp-bioscfg/enum-attributes.c b/drivers/platform/x86/hp/hp-bioscfg/enum-attributes.c
> index 470b9f44ed7aa..af24313d078db 100644
> --- a/drivers/platform/x86/hp/hp-bioscfg/enum-attributes.c
> +++ b/drivers/platform/x86/hp/hp-bioscfg/enum-attributes.c
> @@ -94,8 +94,11 @@ int hp_alloc_enumeration_data(void)
>   	bioscfg_drv.enumeration_instances_count =
>   		hp_get_instance_count(HP_WMI_BIOS_ENUMERATION_GUID);
>   
> -	bioscfg_drv.enumeration_data = kzalloc_objs(*bioscfg_drv.enumeration_data,
> -						    bioscfg_drv.enumeration_instances_count);
> +	if (!bioscfg_drv.enumeration_instances_count)
> +		return -EINVAL;
> +	bioscfg_drv.enumeration_data = kvcalloc(bioscfg_drv.enumeration_instances_count,
> +						sizeof(*bioscfg_drv.enumeration_data), GFP_KERNEL);
> +
>   	if (!bioscfg_drv.enumeration_data) {
>   		bioscfg_drv.enumeration_instances_count = 0;
>   		return -ENOMEM;