linux-kernel - Re: [PATCH v6 08/10] PCI: imx6: Use dwc common suspend resume method

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20241122165712.5m7xuycxzjzatf35@thinkpad>
Date: Fri, 22 Nov 2024 22:27:12 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: Frank Li <Frank.li@....com>
Cc: Richard Zhu <hongxing.zhu@....com>, l.stach@...gutronix.de,
	bhelgaas@...gle.com, lpieralisi@...nel.org, kw@...ux.com,
	robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org,
	shawnguo@...nel.org, s.hauer@...gutronix.de, festevam@...il.com,
	imx@...ts.linux.dev, kernel@...gutronix.de,
	linux-pci@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 08/10] PCI: imx6: Use dwc common suspend resume method

On Fri, Nov 15, 2024 at 12:38:33PM -0500, Frank Li wrote:
> On Fri, Nov 15, 2024 at 12:39:32PM +0530, Manivannan Sadhasivam wrote:
> > On Fri, Nov 01, 2024 at 03:06:08PM +0800, Richard Zhu wrote:
> > > From: Frank Li <Frank.Li@....com>
> > >
> > > Call common dwc suspend/resume function. Use dwc common iATU method to
> > > send out PME_TURN_OFF message. In Old DWC implementations,
> > > PCIE_ATU_INHIBIT_PAYLOAD bit in iATU Ctrl2 register is reserved. So the
> > > generic DWC implementation of sending the PME_Turn_Off message using a
> > > dummy MMIO write cannot be used. Use previouse method to kick off
> > > PME_TURN_OFF MSG for these platforms.
> > >
> > > Replace the imx_pcie_stop_link() and imx_pcie_host_exit() by
> > > dw_pcie_suspend_noirq() in imx_pcie_suspend_noirq().
> > >
> > > Since dw_pcie_suspend_noirq() already does these, see below call stack:
> > > dw_pcie_suspend_noirq()
> > >   dw_pcie_stop_link();
> > >     imx_pcie_stop_link();
> > >   pci->pp.ops->deinit();
> > >     imx_pcie_host_exit();
> > >
> > > Replace the imx_pcie_host_init(), dw_pcie_setup_rc() and
> > > imx_pcie_start_link() by dw_pcie_resume_noirq() in
> > > imx_pcie_resume_noirq().
> > >
> > > Since dw_pcie_resume_noirq() already does these, see below call stack:
> > > dw_pcie_resume_noirq()
> > >   pci->pp.ops->init();
> > >     imx_pcie_host_init();
> > >   dw_pcie_setup_rc();
> > >   dw_pcie_start_link();
> > >     imx_pcie_start_link();
> > >
> >
> > Are these two changes (dw_pcie_suspend_noirq(), dw_pcie_resume_noirq()) related
> > to this patch? If not, these should be in a separate patch.
> 
> 
> Sorry, this patch have not touch dw_pcie_suspend_noirq() and
> dw_pcie_resume_noirq()'s implement, just call it. I have not understood
> what's your means.
> 

Sorry, I got confused. Please ignore above comment.

- Mani

-- 
மணிவண்ணன் சதாசிவம்