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efi_loader: DisconnectController() with no driver

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If DisconnectController() is called and no driver is managing
ControllerHandle, return EFI_SUCCESS.

UEFI SCT II 2017, 3.3.12 DisconnectController(), 5.1.3.12.4 - 5.1.3.12.6

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt 2019-06-02 01:43:33 +02:00
parent 8a802a2eef
commit 66ca24a9a0
1 changed files with 7 additions and 2 deletions
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9
lib/efi_loader/efi_boottime.c
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@ -1134,11 +1134,15 @@ static efi_status_t efi_get_drivers(efi_handle_t handle,
++count;
}
}
*number_of_drivers = 0;
if (!count) {
*driver_handle_buffer = NULL;
return EFI_SUCCESS;
}
/*
* Create buffer. In case of duplicate driver assignments the buffer
* will be too large. But that does not harm.
*/
*number_of_drivers = 0;
*driver_handle_buffer = calloc(count, sizeof(efi_handle_t));
if (!*driver_handle_buffer)
return EFI_OUT_OF_RESOURCES;
@ -1194,7 +1198,8 @@ static efi_status_t efi_disconnect_all_drivers
&driver_handle_buffer);
if (ret != EFI_SUCCESS)
return ret;
if (!number_of_drivers)
return EFI_SUCCESS;
ret = EFI_NOT_FOUND;
while (number_of_drivers) {
r = EFI_CALL(efi_disconnect_controller(