linux-kernel - Re: [PATCH] PCI: Do not enable async suspend for JMicron chips

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Date:	Thu, 06 Nov 2014 09:25:21 +0100
From:	Barto <mister.freeman@...oste.net>
To:	"Liu, Chuansheng" <chuansheng.liu@...el.com>,
	"Lu, Aaron" <aaron.lu@...el.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>
CC:	"Tejun Heo (tj@...nel.org)" <tj@...nel.org>,
	Rafael Wysocki <rjw@...ysocki.net>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] PCI: Do not enable async suspend for JMicron chips

I tried your patch and it doesn't work,

I think you have forgotten something, maybe you need also to modify the
file /drivers/ata/ahci.c and not only /drivers/ata/pata_jmicron.c

don't forget that I have a JMB363/368 SATA/IDE controller PCIe, which is
both a SATA and IDE controller in one PCie card, and a IDE hardisk is
connected on this JMB363/368 SATA/IDE controller PCIe,

for now the patch who works is this :

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -2046,7 +2046,17 @@ void pci_pm_init(struct pci_dev *dev)
 	pm_runtime_forbid(&dev->dev);
 	pm_runtime_set_active(&dev->dev);
 	pm_runtime_enable(&dev->dev);
-	device_enable_async_suspend(&dev->dev);
+	
+     /*
+      * The JMicron chip 361/363/368 contains one SATA controller and
+      * one PATA controller, they are brother-relation ship in PCI tree,
+      * but for powering on these both controller, we must follow the
+      * sequence one by one, otherwise one of them can not be powered on
+      * successfully, so here we disable the async suspend method for
+      * Jmicron chip.
+      */
+     if (dev->vendor != PCI_VENDOR_ID_JMICRON)
+         device_enable_async_suspend(&dev->dev);
 	dev->wakeup_prepared = false;

 	dev->pm_cap = 0;


Le 06/11/2014 07:39, Liu, Chuansheng a écrit :
> 

> diff --git a/drivers/ata/pata_jmicron.c b/drivers/ata/pata_jmicron.c
> index 47e418b..9e85f86 100644
> --- a/drivers/ata/pata_jmicron.c
> +++ b/drivers/ata/pata_jmicron.c
> @@ -158,6 +158,21 @@ static int jmicron_init_one (struct pci_dev *pdev, const struct pci_device_id *i
>         return ata_pci_bmdma_init_one(pdev, ppi, &jmicron_sht, NULL, 0);
>  }
>  
> +/*
> + * For JMicron chips, we need to disable the async_suspend method, otherwise
> + * they will hit the power-on issue when doing device resume, add one quick
> + * solution to disable the async_suspend method.
> + */
> +static void pci_async_suspend_fixup(struct pci_dev *pdev)
> +{
> +       /*
> +        * disabling the async_suspend method for JMicron chips to
> +        * avoid device resuming issue.
> +        */
> +       device_disable_async_suspend(&pdev->dev);
> +}
> +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, pci_async_suspend_fixup);
> +
>  static const struct pci_device_id jmicron_pci_tbl[] = {
>         { PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
>           PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 0 },
> 
> Barto,
> Could you have a try on your side? Thanks.
> 
> 
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