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[efi] Open device path protocol only at point of use

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Some EFI 1.10 systems (observed on an Apple iMac) do not allow us to
open the device path protocol with an attribute of
EFI_OPEN_PROTOCOL_BY_DRIVER and so we cannot maintain a safe,
long-lived pointer to the device path.  Work around this by instead
opening the device path protocol with an attribute of
EFI_OPEN_PROTOCOL_GET_PROTOCOL whenever we need to use it.

Debugged-by: Curtis Larsen <larsen@dixie.edu>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2014-08-05 20:49:42 +01:00
parent 3b42ed477f
commit 7b3cc18462
6 changed files with 73 additions and 52 deletions
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2
src/image/efi_image.c
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@@ -167,7 +167,7 @@ static int efi_image_exec ( struct image *image ) {
}
/* Create device path for image */
path = efi_image_path ( image, &snpdev->path );
path = efi_image_path ( image, snpdev->path );
if ( ! path ) {
DBGC ( image, "EFIIMAGE %p could not create device path\n",
image );