Brocade bna interface generates a large amount of soft interrupts (IRQs)

Issue

• Brocade bna interface generates a large amount of soft interrupts (IRQs)
• Issue is apparent on inbox and 3rd party drivers
• So far this has been tracked with EMC appliances running the Brocade 1020 10Gigabit CNA adapters at multiple customers.
• The description we have from Qlogic so far is that the receipt off CRC errors has the firmware and driver getting out of sync.
• When this happens the hardware keeps sending interrupts that are not acknowledged by the driver so they ramp up in a hurry and cause unnecessary system overhead and performance issues.