Looks good,
Reviewed-by: Johannes Thumshirn <redacted>

+static int floppy_revalidate(struct gendisk *disk);

Completely unrelated to this series but, this is the 3rd floppy 
driver in the series defining it's own floppy_revalidate() and 
naming it floppy_revalidate().

This makes grepping and reviewing a pain.