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Date:   Thu, 28 Feb 2019 07:31:57 +0100
From:   Lukas Wunner <lukas@wunner.de>
To:     Alexandru Gagniuc <mr.nuke.me@gmail.com>
Cc:     bhelgaas@google.com, austin_bolen@dell.com,
        alex_gagniuc@dellteam.com, keith.busch@intel.com,
        Shyam_Iyer@Dell.com, okaya@kernel.org,
        "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
        Oza Pawandeep <poza@codeaurora.org>,
        Mika Westerberg <mika.westerberg@linux.intel.com>,
        Benjamin Young <youngcdev@gmail.com>,
        Frederick Lawler <fred@fredlawl.com>,
        linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org
Subject: Re: [PATCH v3] PCI: portdrv: Report degraded links via link
 bandwidth notification
Message-ID: <20190228063157.rl2lywgian2ij5m4@wunner.de>
References: <20190227205840.26898-1-mr.nuke.me@gmail.com>
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On Wed, Feb 27, 2019 at 02:58:17PM -0600, Alexandru Gagniuc wrote:
> A warning is generated when a PCIe device is probed with a degraded
> link, but there was no similar mechanism to warn when the link becomes
> degraded after probing. The Link Bandwidth Notification provides this
> mechanism.
> 
> Use the link bandwidth notification interrupt to detect bandwidth
> changes, and rescan the bandwidth, looking for the weakest point. This
> is the same logic used in probe().
> 
> Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>

Reviewed-by: Lukas Wunner <lukas@wunner.de>