linux-kernel - Re: [PATCH v2 0/5] PCI: dwc: improve msi handling

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Message-ID: <20201006143647.3f989340@xhacker.debian>
Date:   Tue, 6 Oct 2020 14:36:47 +0800
From:   Jisheng Zhang <Jisheng.Zhang@...aptics.com>
To:     Vidya Sagar <vidyas@...dia.com>
Cc:     Kishon Vijay Abraham I <kishon@...com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Rob Herring <robh@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Jingoo Han <jingoohan1@...il.com>,
        Kukjin Kim <kgene@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Richard Zhu <hongxing.zhu@....com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        "Yue Wang" <yue.wang@...ogic.com>,
        Kevin Hilman <khilman@...libre.com>,
        "Neil Armstrong" <narmstrong@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Jesper Nilsson <jesper.nilsson@...s.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        Xiaowei Song <songxiaowei@...ilicon.com>,
        Binghui Wang <wangbinghui@...ilicon.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Stanimir Varbanov <svarbanov@...sol.com>,
        Pratyush Anand <pratyush.anand@...il.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        "Kunihiko Hayashi" <hayashi.kunihiko@...ionext.com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        "linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-samsung-soc@...r.kernel.org" 
        <linux-samsung-soc@...r.kernel.org>,
        "linux-amlogic@...ts.infradead.org" 
        <linux-amlogic@...ts.infradead.org>,
        "linux-arm-kernel@...s.com" <linux-arm-kernel@...s.com>,
        "linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>,
        "linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>
Subject: Re: [PATCH v2 0/5] PCI: dwc: improve msi handling

On Tue, 6 Oct 2020 11:56:34 +0530 Vidya Sagar wrote:

> 
> 
> Hi,

Hi,

> I would like to verify this series along with the other series "PCI:
> dwc: fix two MSI issues" on Tegra194. I tried to apply these series on
> both linux-next and Lorenzo's pci/dwc branches but there seem to be non
> trivial conflicts. Could you please tell me which branch I can use and
> apply these series cleanly?

This is a fix, so I thought the series would be picked up in v5.9, so the
series is patched against v5.9-rcN

could you please try v5 https://lkml.org/lkml/2020/9/29/2511 on v5.9-rc7?


Thanks

> FWIW, I acknowledge that the existing code does leak MSI target page
> every time system goes through suspend-resume sequence on Tegra194.
> 
> Thanks,
> Vidya Sagar
> 
> On 9/24/2020 4:35 PM, Jisheng Zhang wrote:
> > External email: Use caution opening links or attachments
> >
> >
> > Improve the msi code:
> > 1. Add proper error handling.
> > 2. Move dw_pcie_msi_init() from each users to designware host to solve
> > msi page leakage in resume path.
> >
> > 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 (5):
> >    PCI: dwc: Call dma_unmap_page() before freeing the msi page
> >    PCI: dwc: Check alloc_page() return value
> >    PCI: dwc: Rename dw_pcie_free_msi to dw_pcie_msi_deinit
> >    PCI: dwc: Skip PCIE_MSI_INTR0* programming if MSI is disabled
> >    PCI: dwc: Move dw_pcie_msi_init() from each users to designware host
> >
> >   drivers/pci/controller/dwc/pci-dra7xx.c       |  1 +
> >   drivers/pci/controller/dwc/pci-exynos.c       |  2 -
> >   drivers/pci/controller/dwc/pci-imx6.c         |  3 --
> >   drivers/pci/controller/dwc/pci-meson.c        |  8 ----
> >   drivers/pci/controller/dwc/pcie-artpec6.c     | 10 -----
> >   .../pci/controller/dwc/pcie-designware-host.c | 43 +++++++++++++------
> >   .../pci/controller/dwc/pcie-designware-plat.c |  3 --
> >   drivers/pci/controller/dwc/pcie-designware.h  |  9 +++-
> >   drivers/pci/controller/dwc/pcie-histb.c       |  3 --
> >   drivers/pci/controller/dwc/pcie-kirin.c       |  3 --
> >   drivers/pci/controller/dwc/pcie-qcom.c        |  3 --
> >   drivers/pci/controller/dwc/pcie-spear13xx.c   |  1 -
> >   drivers/pci/controller/dwc/pcie-tegra194.c    |  2 -
> >   drivers/pci/controller/dwc/pcie-uniphier.c    |  9 +---
> >   14 files changed, 38 insertions(+), 62 deletions(-)
> >
> > --
> > 2.28.0
> >