On 09/24/2014 03:22 PM, Chuansheng Liu wrote:
> Like the commit e6b7e41cdd8c ("ata: Disabling the async PM for JMicron chip 363/361"),
> Barto found the similar issue for JMicron chip 368, that 363/368 has no
> parent-children relationship, but they have the power dependency.
>
> So here we can exclude the JMicron chips out of pm_async method directly,
> to avoid further similar issues.
>
> Details in:
> https://bugzilla.kernel.org/show_bug.cgi?id=84861
I think we can disable the async PM for JMicron chips in PCI subsystem:
pci_pm_init, check if it is JMicron chip and then enable_async
accordingly. The problem doesn't have much to do with ATA, so move them
to PCI may be more appropriate.
Thanks,
Aaron
>
> Reported-and-tested-by: Barto <mister.freeman@xxxxxxxxxxx>
> Signed-off-by: Chuansheng Liu <chuansheng.liu@xxxxxxxxx>
> ---
> drivers/ata/ahci.c | 11 +++++------
> drivers/ata/pata_jmicron.c | 11 +++++------
> 2 files changed, 10 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
> index a0cc0ed..85aa6ec 100644
> --- a/drivers/ata/ahci.c
> +++ b/drivers/ata/ahci.c
> @@ -1340,15 +1340,14 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
> ahci_pci_bar = AHCI_PCI_BAR_ENMOTUS;
>
> /*
> - * The JMicron chip 361/363 contains one SATA controller and one
> + * The JMicron chip 361/363/368 contains one SATA controller and one
> * PATA controller,for powering on these both controllers, 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 these chips.
> + * powered on successfully.
> + * Here we can exclude the Jmicron family directly out of pm_async
> + * method to follow the power-on sequence.
> */
> - if (pdev->vendor == PCI_VENDOR_ID_JMICRON &&
> - (pdev->device == PCI_DEVICE_ID_JMICRON_JMB363 ||
> - pdev->device == PCI_DEVICE_ID_JMICRON_JMB361))
> + if (pdev->vendor == PCI_VENDOR_ID_JMICRON)
> device_disable_async_suspend(&pdev->dev);
>
> /* acquire resources */
> diff --git a/drivers/ata/pata_jmicron.c b/drivers/ata/pata_jmicron.c
> index 47e418b..1d685b6 100644
> --- a/drivers/ata/pata_jmicron.c
> +++ b/drivers/ata/pata_jmicron.c
> @@ -144,15 +144,14 @@ static int jmicron_init_one (struct pci_dev *pdev, const struct pci_device_id *i
> const struct ata_port_info *ppi[] = { &info, NULL };
>
> /*
> - * The JMicron chip 361/363 contains one SATA controller and one
> + * The JMicron chip 361/363/368 contains one SATA controller and one
> * PATA controller,for powering on these both controllers, 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 these chips.
> + * powered on successfully.
> + * Here we can exclude the Jmicron family directly out of pm_async
> + * method to follow the power-on sequence.
> */
> - if (pdev->vendor == PCI_VENDOR_ID_JMICRON &&
> - (pdev->device == PCI_DEVICE_ID_JMICRON_JMB363 ||
> - pdev->device == PCI_DEVICE_ID_JMICRON_JMB361))
> + if (pdev->vendor == PCI_VENDOR_ID_JMICRON)
> device_disable_async_suspend(&pdev->dev);
>
> return ata_pci_bmdma_init_one(pdev, ppi, &jmicron_sht, NULL, 0);
>
--
To unsubscribe from this list: send the line "unsubscribe linux-pci" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
