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efi_loader: fix efi_dp_find_obj()

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efi_dp_find_obj() should not return any handle with a partially matching
device path but the handle with the maximum matching device path.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
This commit is contained in:
Heinrich Schuchardt
2022-03-04 08:20:00 +01:00
parent 8399488672
commit c409593d08
2 changed files with 63 additions and 51 deletions
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4
include/efi_loader.h
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@@ -730,8 +730,8 @@ struct efi_device_path *efi_dp_shorten(struct efi_device_path *dp);
struct efi_device_path *efi_dp_next(const struct efi_device_path *dp);
int efi_dp_match(const struct efi_device_path *a,
const struct efi_device_path *b);
struct efi_object *efi_dp_find_obj(struct efi_device_path *dp,
struct efi_device_path **rem);
efi_handle_t efi_dp_find_obj(struct efi_device_path *dp,
struct efi_device_path **rem);
/* get size of the first device path instance excluding end node */
efi_uintn_t efi_dp_instance_size(const struct efi_device_path *dp);
/* size of multi-instance device path excluding end node */