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. Bug link: https://bugzilla.kernel.org/show_bug.cgi?id=81551 https://bugzilla.kernel.org/show_bug.cgi?id=84861 And we can revert the below commit after this patch is applied: e6b7e41(ata: Disabling the async PM for JMicron chip 363/361) Cc: stable@xxxxxxxxxxxxxxx # 3.15+ Acked-by: Aaron Lu <aaron.lu@xxxxxxxxx> Signed-off-by: Chuansheng Liu <chuansheng.liu@xxxxxxxxx> --- drivers/pci/pci.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 625a4ac..53128f0 100644 --- 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; -- 1.7.9.5 -- 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
