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Date:   Mon, 16 Apr 2018 11:26:36 -0400 (EDT)
From:   David Miller <>
Subject: Re: [PATCH] ibmvnic: Clear pending interrupt after device reset

From: Thomas Falcon <>
Date: Sun, 15 Apr 2018 18:53:36 -0500

> Due to a firmware bug, the hypervisor can send an interrupt to a
> transmit or receive queue just prior to a partition migration, not
> allowing the device enough time to handle it and send an EOI. When
> the partition migrates, the interrupt is lost but an "EOI-pending"
> flag for the interrupt line is still set in firmware. No further
> interrupts will be sent until that flag is cleared, effectively
> freezing that queue. To workaround this, the driver will disable the
> hardware interrupt and send an H_EOI signal prior to re-enabling it.
> This will flush the pending EOI and allow the driver to continue
> operation.
> Signed-off-by: Thomas Falcon <>

Applied, thanks Thomas.

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