[U-Boot] [PATCH 2/2] efi_loader: do not set invalid screen mode

[Heinrich Schuchardt]

EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.SetMode() should return EFI_UNDEFINED if a
screen mode is not available.

Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
---
 lib/efi_loader/efi_console.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/efi_loader/efi_console.c b/lib/efi_loader/efi_console.c
index d5222c46b4..540a009145 100644
--- a/lib/efi_loader/efi_console.c
+++ b/lib/efi_loader/efi_console.c
@@ -375,6 +375,10 @@ static efi_status_t EFIAPI efi_cout_set_mode(

 	if (mode_number >= efi_con_mode.max_mode)
 		return EFI_EXIT(EFI_UNSUPPORTED);
+
+	if (!efi_cout_modes[mode_number].present)
+		return EFI_EXIT(EFI_UNSUPPORTED);
+
 	efi_con_mode.mode = mode_number;
 	EFI_CALL(efi_cout_clear_screen(this));

--
2.23.0.rc1