netdev - Re: [PATCH net-next] liquidio: fix rare pci

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Date:   Fri, 26 May 2017 14:42:35 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     felix.manlunas@...ium.com
Cc:     netdev@...r.kernel.org, raghu.vatsavayi@...ium.com,
        derek.chickles@...ium.com, satananda.burla@...ium.com,
        prasad.kanneganti@...ium.com
Subject: Re: [PATCH net-next] liquidio: fix rare pci_driver.probe failure
 of VF driver

From: Felix Manlunas <felix.manlunas@...ium.com>
Date: Thu, 25 May 2017 10:42:14 -0700

> From: Prasad Kanneganti <prasad.kanneganti@...ium.com>
> 
> There's a rare pci_driver.probe failure of the VF driver that's caused by
> PF/VF handshake going out of sync.  The culprit is octeon_mbox_write() who
> ignores an ack timeout condition; it just keeps unconditionally writing all
> elements of mbox_cmd->data[] even when the other side is not ready for
> them.  Fix it by making each write of mbox_cmd->data[i] conditional to
> having previously received an ack.
> 
> Also fix the octeon_mbox_state enum such that each state gets a unique
> value.  Also add ULL suffix to numeric literals in macro definitions.
> 
> Signed-off-by: Prasad Kanneganti <prasad.kanneganti@...ium.com>
> Signed-off-by: Felix Manlunas <felix.manlunas@...ium.com>

Applied.