I was surprised too.
Raoul does have a lesser known brother, Jean Dufy, and they both did fabrics as well as paintings. However, the little I can see of the fabric does seem to be in the style of Raoul's flower paintings (more so perhaps than it is of his fabric designs), so I suspect if it's not a genuine Dufy fabric design, it's a homage / allusion / ripoff of Raoul Dufy, rather than an entirely different artist. And the signature is pretty close.