linux-kernel - Re: [PATCH v15 17/17] PCI: imx6: Reformat suspend callback to keep symmetric with resume

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Date:   Mon, 18 Jul 2022 06:19:00 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Richard Zhu <hongxing.zhu@....com>
Cc:     l.stach@...gutronix.de, bhelgaas@...gle.com, robh+dt@...nel.org,
        broonie@...nel.org, lorenzo.pieralisi@....com, festevam@...il.com,
        francesco.dolcini@...adex.com, linux-pci@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kernel@...gutronix.de, linux-imx@....com
Subject: Re: [PATCH v15 17/17] PCI: imx6: Reformat suspend callback to keep
 symmetric with resume

On Thu, Jul 14, 2022 at 03:31:09PM +0800, Richard Zhu wrote:
> Create imx6_pcie_stop_link() and imx6_pcie_host_exit() functions.
> Encapsulate clocks, regulators disables and PHY uninitialization into
> imx6_pcie_host_exit().
> 
> To keep suspend/resume symmetric as much as possible, invoke these two
> new created functions in suspend callback.
> 
> To be symmetric with imx6_pcie_host_exit(), move imx6_pcie_clk_enable()
> to imx6_pcie_host_init() from imx6_pcie_deassert_core_reset().
> 
> Link: https://lore.kernel.org/r/1656645935-1370-18-git-send-email-hongxing.zhu@nxp.com
> Signed-off-by: Richard Zhu <hongxing.zhu@....com>
> Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
> Reviewed-by: Lucas Stach <l.stach@...gutronix.de>

If CONFIG_PM_SLEEP=n:

Error log:
drivers/pci/controller/dwc/pci-imx6.c:973:13: error: 'imx6_pcie_host_exit' defined but not used [-Werror=unused-function]
  973 | static void imx6_pcie_host_exit(struct dw_pcie_rp *pp)
      |             ^~~~~~~~~~~~~~~~~~~
drivers/pci/controller/dwc/pci-imx6.c:904:13: error: 'imx6_pcie_stop_link' defined but not used [-Werror=unused-function]
  904 | static void imx6_pcie_stop_link(struct dw_pcie *pci)

Guenter