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Although very unlikey, if size is too small or zero, then we end up with status not being set and returning garbage. Instead, initializing status to EFI_INVALID_PARAMETER to indicate that size is invalid in the calls to setup_uga32 and setup_uga64. Signed-off-by: Colin Ian King <colin.king@canonical.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@kernel.org> Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>