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efi_loader: simplify try_load_entry()

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Use function efi_create_indexed_name() to create the BootXXXX variable
name.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
This commit is contained in:
Heinrich Schuchardt 2022-04-25 23:35:01 +02:00
parent dd1086ac6b
commit 4f419960bf
1 changed files with 2 additions and 6 deletions
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8
lib/efi_loader/efi_bootmgr.c
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@ -46,16 +46,12 @@ static efi_status_t try_load_entry(u16 n, efi_handle_t *handle,
void **load_options)
{
struct efi_load_option lo;
u16 varname[] = u"Boot0000";
u16 hexmap[] = u"0123456789ABCDEF";
u16 varname[9];
void *load_option;
efi_uintn_t size;
efi_status_t ret;
varname[4] = hexmap[(n & 0xf000) >> 12];
varname[5] = hexmap[(n & 0x0f00) >> 8];
varname[6] = hexmap[(n & 0x00f0) >> 4];
varname[7] = hexmap[(n & 0x000f) >> 0];
efi_create_indexed_name(varname, sizeof(varname), "Boot", n);
load_option = efi_get_var(varname, &efi_global_variable_guid, &size);
if (!load_option)