linux-kernel - Re: [PATCH v7 0/2] PCI: dwc: fix two MSI issues

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Message-ID: <20201009084904.GA16200@e121166-lin.cambridge.arm.com>
Date:   Fri, 9 Oct 2020 09:49:05 +0100
From:   Lorenzo Pieralisi <lorenzo.pieralisi@....com>
To:     Jisheng Zhang <Jisheng.Zhang@...aptics.com>
Cc:     Kishon Vijay Abraham I <kishon@...com>,
        Rob Herring <robh@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Jingoo Han <jingoohan1@...il.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        linux-omap@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 0/2] PCI: dwc: fix two MSI issues

On Fri, Oct 09, 2020 at 03:53:11PM +0800, Jisheng Zhang wrote:
> Fix two MSI issues. One to skip PCIE_MSI_INTR0* programming if MSI is
> disabled, another to use an address in the driver data for MSI address,
> to fix the MSI page leakage during suspend/resume.
> 
> Since v6:
>   - Keep the IS_ENABLED(CONFIG_PCI_MSI) check in dw_pcie_msi_init().
> 
> Since v5:
>   - rebase on pci/dwc branch
>   - add Acked-by tag
> 
> Since v4:
>   - fix pci-dra7xx.c
> 
> Since v3:
>   - add Acked-by tag
>   - change patch2 commit msg to make it clear
>   - map the MSI msg with dma_map_single_attrs() for some platforms
>     which either has separate addrs for dma and phy or has mem access
>     limitation for the PCIe.
> 
> Since v2:
>   - add Acked-by tag
>   - use an address in the driver data for MSI address. Thank Ard and Rob
>     for pointing out this correct direction.
>   - Since the MSI page has gone, the leak issue doesn't exist anymore,
>     remove unnecessary patches.
>   - Remove dw_pcie_free_msi rename and the last patch. They could be
>     targeted to next. So will send out patches in a separate series.
> 
> Since v1:
>   - add proper error handling patches.
>   - solve the msi page leakage by moving dw_pcie_msi_init() from each
>     users to designware host
> 
> Jisheng Zhang (2):
>   PCI: dwc: Skip PCIE_MSI_INTR0* programming if MSI is disabled
>   PCI: dwc: Fix MSI page leakage in suspend/resume
> 
>  drivers/pci/controller/dwc/pci-dra7xx.c       | 18 +++++++++-
>  .../pci/controller/dwc/pcie-designware-host.c | 35 ++++++++++---------
>  drivers/pci/controller/dwc/pcie-designware.h  |  2 +-
>  3 files changed, 37 insertions(+), 18 deletions(-)

Applied to pci/dwc, thanks.

Lorenzo