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[Bug 1611399] Re: [SRU] xgene_enet: an extra interrupt may be pending for an interrupt controller that doesn't support irq_disable and hardware with level interrupt

 

** Also affects: linux (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Changed in: linux (Ubuntu Xenial)
       Status: New => Fix Committed

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https://bugs.launchpad.net/bugs/1611399

Title:
  [SRU] xgene_enet: an extra interrupt may be pending for an interrupt
  controller that doesn't support irq_disable and hardware with level
  interrupt

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Xenial:
  Fix Committed

Bug description:
  [Impact]
  For interrupt controller that doesn't support irq_disable and hardware
  with level interrupt, an extra interrupt may be pending. This patch fixes
  the issue by setting IRQ_DISABLE_UNLAZY flag for the interrupt line,
  as suggested by,

  'commit e9849777d0e2 ("genirq: Add flag to force mask in
           disable_irq[_nosync]()")'

  [Test Case]
  Run iperf on a merlin board to exercise the xgene_enet driver

  [Regression Risk]
  This commit only affects the xgene_enet driver

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