Cut-through bridge error isolation

A method comprising:

• intercepting, by a control signal interceptor of a controller, one or more control signals between a first stage and a second stage of a cut-through bridge of the controller comprising a plurality of stages for communication packet transmission, wherein the controller is a component of a peripheral component interconnect express (PCIe) adapter;
• generating a forced valid control signal for each of the one or more control signals regardless of an error condition of the one or more control signals;
• outputting the forced valid control signal for each of the one or more control signals to the second stage of the cut-through bridge;
• and
• propagating the forced valid control signal for each of the one or more control signals through one or more successive stages of the cut-through bridge to an end stage to prevent an invalid state at the end stage.

A computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a processing circuit of a controller to cause the processing circuit to perform:

• intercepting one or more control signals between a first stage and a second stage of a cut-through bridge comprising a plurality of stages for communication packet transmission;
• generating a forced valid control signal for each of the one or more control signals regardless of an error condition of the one or more control signals;
• outputting the forced valid control signal for each of the one or more control signals to the second stage of the cut-through bridge;
• propagating the forced valid control signal for each of the one or more control signals through one or more successive stages of the cut-through bridge to an end stage to prevent an invalid state at the end stage;
• detecting the error condition of the one or more control signals by an error monitor between the first stage and the second stage of the cut-through bridge;
• applying a logical-OR of the error condition with an existing error signal as an augmented error signal;
• and
• outputting the augmented error signal.