Recent platforms require more slack slots than the current value of EFI_MMAP_NR_SLACK_SLOTS, otherwise they fail to boot. The current workaround is to append `efi=disable_early_pci_dma` to the kernel's cmdline. So, bump up EFI_MMAP_NR_SLACK_SLOTS to 32 to allow those platforms to boot with the aforementioned workaround. Cc: stable@xxxxxxxxxx Cc: Ard Biesheuvel <ardb@xxxxxxxxxx> Cc: Allen Pais <apais@xxxxxxxxxxxxxxxxxxx> Cc: Tyler Hicks <code@xxxxxxxxxxx> Signed-off-by: Hamza Mahfooz <hamzamahfooz@xxxxxxxxxxxxxxxxxxx> --- drivers/firmware/efi/libstub/efistub.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/firmware/efi/libstub/efistub.h b/drivers/firmware/efi/libstub/efistub.h index 76e44c185f29..e95ce6ae5c26 100644 --- a/drivers/firmware/efi/libstub/efistub.h +++ b/drivers/firmware/efi/libstub/efistub.h @@ -171,7 +171,7 @@ void efi_set_u64_split(u64 data, u32 *lo, u32 *hi) * the EFI memory map. Other related structures, e.g. x86 e820ext, need * to factor in this headroom requirement as well. */ -#define EFI_MMAP_NR_SLACK_SLOTS 8 +#define EFI_MMAP_NR_SLACK_SLOTS 32 typedef struct efi_generic_dev_path efi_device_path_protocol_t; -- 2.47.1
