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efi/libstub: Use cleanup helpers for freeing copies of the memory map

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The EFI stub may obtain the memory map from the firmware numerous times,
and this involves doing a EFI pool allocation first, which needs to be
freed after use.

Streamline this using a cleanup helper, which makes the code easier to
follow.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
This commit is contained in:
Ard Biesheuvel
2024-12-19 15:30:39 +01:00
parent 90534e689d
commit ad69b0b6f9
5 changed files with 20 additions and 29 deletions
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4
drivers/firmware/efi/libstub/randomalloc.c
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@@ -59,9 +59,9 @@ efi_status_t efi_random_alloc(unsigned long size,
unsigned long alloc_min,
unsigned long alloc_max)
{
struct efi_boot_memmap *map __free(efi_pool) = NULL;
unsigned long total_slots = 0, target_slot;
unsigned long total_mirrored_slots = 0;
struct efi_boot_memmap *map;
efi_status_t status;
int map_offset;
@@ -130,7 +130,5 @@ efi_status_t efi_random_alloc(unsigned long size,
break;
}
efi_bs_call(free_pool, map);
return status;
}