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[efi] Ensure that all drivers are shut down before the OS boots

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Reported-by: Itay Gazit <itayg@mellanox.co.il>
Suggested-by: Michael R Turner <mikeyt@us.ibm.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2011-03-29 21:35:06 +01:00
parent 797c29adda
commit fc7239bdc8
3 changed files with 51 additions and 32 deletions
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30
src/image/efi_image.c
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@@ -26,20 +26,6 @@ FILE_LICENCE ( GPL2_OR_LATER );
FEATURE ( FEATURE_IMAGE, "EFI", DHCP_EB_FEATURE_EFI, 1 );
/** Event used to signal shutdown */
static EFI_EVENT efi_shutdown_event;
/**
* Shut down in preparation for booting an OS.
*
* This hook gets called at ExitBootServices time in order to make sure that
* the network cards are properly shut down before the OS takes over.
*/
static EFIAPI void efi_shutdown_hook ( EFI_EVENT event __unused,
void *context __unused ) {
shutdown_boot();
}
/**
* Execute EFI image
*
@@ -64,30 +50,14 @@ static int efi_image_exec ( struct image *image ) {
return -ENOEXEC;
}
/* Be sure to shut down the NIC at ExitBootServices time, or else
* DMA from the card can corrupt the OS.
*/
efirc = bs->CreateEvent ( EVT_SIGNAL_EXIT_BOOT_SERVICES,
TPL_CALLBACK, efi_shutdown_hook,
NULL, &efi_shutdown_event );
if ( efirc ) {
rc = EFIRC_TO_RC ( efirc );
goto done;
}
/* Start the image */
if ( ( efirc = bs->StartImage ( handle, &exit_data_size,
&exit_data ) ) != 0 ) {
DBGC ( image, "EFIIMAGE %p returned with status %s\n",
image, efi_strerror ( efirc ) );
}
rc = EFIRC_TO_RC ( efirc );
/* Remove the shutdown hook */
bs->CloseEvent ( efi_shutdown_event );
done:
/* Unload the image. We can't leave it loaded, because we
* have no "unload" operation.
*/