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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/include/ipxe/efi/efi_driver.h
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@@ -19,8 +19,6 @@ struct efi_device {
struct device dev;
/** EFI device handle */
EFI_HANDLE device;
/** Device path */
EFI_DEVICE_PATH_PROTOCOL *path;
/** Driver for this device */
struct efi_driver *driver;
/** Driver-private data */

8
src/include/ipxe/efi/efi_snp.h
View File

@@ -66,12 +66,8 @@ struct efi_snp_device {
wchar_t driver_name[16];
/** Controller name */
wchar_t controller_name[64];
/** The device path
*
* This field is variable in size and must appear at the end
* of the structure.
*/
EFI_DEVICE_PATH_PROTOCOL path;
/** The device path */
EFI_DEVICE_PATH_PROTOCOL *path;
};
extern int efi_snp_hii_install ( struct efi_snp_device *snpdev );