linux-kernel - Re: [PATCH v3 01/13] PCI: dwc: Stop link in the host init error and de-initialization

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Message-ID: <20220526213028.GO54904-robh@kernel.org>
Date:   Thu, 26 May 2022 16:30:28 -0500
From:   Rob Herring <robh@...nel.org>
To:     Serge Semin <Sergey.Semin@...kalelectronics.ru>
Cc:     Jingoo Han <jingoohan1@...il.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Serge Semin <fancer.lancer@...il.com>,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Pavel Parkhomenko <Pavel.Parkhomenko@...kalelectronics.ru>,
        Frank Li <Frank.Li@....com>, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 01/13] PCI: dwc: Stop link in the host init error and
 de-initialization

On Tue, May 17, 2022 at 03:50:46PM +0300, Serge Semin wrote:
> It's logically correct to undo everything what was done in case of an
> error is discovered or in the corresponding cleanup counterpart. Otherwise
> the host controller will be left in an undetermined state. Seeing the link
> is set up in the Host-initialization method it will be right to
> de-activate it there in the cleanup-on-error block and stop the link in
> the antagonistic routine - dw_pcie_host_deinit(). The link de-activation
> is a platform-specific thing and is supposed to be implemented in the
> framework of the dw_pcie_ops.stop_link() operation.
> 
> Fixes: 886a9c134755 ("PCI: dwc: Move link handling into common code")
> Signed-off-by: Serge Semin <Sergey.Semin@...kalelectronics.ru>
> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> Tested-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> ---
>  .../pci/controller/dwc/pcie-designware-host.c    | 16 ++++++++++++++--
>  1 file changed, 14 insertions(+), 2 deletions(-)

Reviewed-by: Rob Herring <robh@...nel.org>