linux-kernel - Re: [PATCH] PCI: pciehp: Add quirk for QDF2400 Command Completed erratum

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Message-ID: <20180507124349.GC2879@lahna.fi.intel.com>
Date:   Mon, 7 May 2018 15:43:49 +0300
From:   Mika Westerberg <mika.westerberg@...ux.intel.com>
To:     Sinan Kaya <okaya@...eaurora.org>
Cc:     linux-pci@...r.kernel.org, timur@...eaurora.org,
        sulrich@...eaurora.org, linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, stable@...r.kernel.org,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kees Cook <keescook@...omium.org>,
        Markus Elfring <elfring@...rs.sourceforge.net>,
        Keith Busch <keith.busch@...el.com>,
        Lukas Wunner <lukas@...ner.de>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] PCI: pciehp: Add quirk for QDF2400 Command Completed
 erratum

On Sun, May 06, 2018 at 06:30:53AM -0400, Sinan Kaya wrote:
> The QDF2400 controller does not set the Command Completed bit unless
> writes to the Slot Command register change "Control" bits.  Command
> Completed is never set for writes that only change software notification
> "Enable" bits.  This results in timeouts like this:
> 
> pciehp 0000:00:00.0:pcie004: Timeout on hotplug command 0x1038
> 
> Cc: stable@...r.kernel.org
> Signed-off-by: Sinan Kaya <okaya@...eaurora.org>

Reviewed-by: Mika Westerberg <mika.westerberg@...ux.intel.com>