Upper portion of a dishwasher door

FIG. 1 is a front perspective view of an upper portion of a dishwasher door according our new ornamental design;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof, with the right side view thereof being a mirror image thereof; and,

FIG. 4 is another perspective view from the bottom thereof.

The broken lines of the dishwasher, dishwasher compartment and/or components thereof show surrounding structure or environment and do not form part of the claimed design.

The dotted lines represent the border between claimed and unclaimed subject matter and do not form a part of the claimed design.

The bottom and rear parts of the dishwasher door, and the bottom, rear and top of the dishwasher compartment are unornamented or simply not claimed and form no part of the claimed design.