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Some BIOSes do not always set CF on error before return from int13. The patch adds additional check for status being zero (AH == 0). Signed-off-by: Andrey Borzenkov <arvidjaar@mail.ru> Cc: Matt Domsch <Matt_Domsch@dell.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>