On Monday 19 January 2009, Andrey Borzenkov wrote: > On 19 января 2009 12:51:12 Rafael J. Wysocki wrote: > > On Monday 19 January 2009, Andrey Borzenkov wrote: > > > On 19 января 2009 03:17:49 Rafael J. Wysocki wrote: > > > > On Sunday 18 January 2009, Andrey Borzenkov wrote: > > > > > On 18 января 2009 23:21:24 Rafael J. Wysocki wrote: > > > > > > > > As far as I can tell, timekeeping_resume is called via > > > > > > > > class ->resume method; and according to comments in > > > > > > > > sysdev_resume() and device_power_up(), they are called > > > > > > > > with interrupts disabled. > > > > > > > > > > > > > > > > Looking at suspend_enter, irqs *are* disabled at this > > > > > > > > point. > > > > > > > > > > > > > > > > So it actually looks like something (may be some driver) > > > > > > > > unconditionally enabled irqs in resume path. > > > > > > > > > > > > > > > > I believe the patch should be hold back until this is > > > > > > > > clarified. > > > > > > > > > > > > > > That's a nice theory! > > > > > > > > > > > > That would be a bad bug. > [...] > > > > However, I suspect the problem is somewhere else. > > > > Right. > > > Can you apply the patch I sent earlier in this thread > > (http://lkml.org/lkml/2009/1/18/183) and retest? > > > > I did and it was silent. But with patch below I get: > > [ 152.526550] Freezing user space processes ... (elapsed 0.01 seconds) > done. > [ 152.544162] Freezing remaining freezable tasks ... (elapsed 0.00 seconds) > done. > [ 152.544854] Suspending console(s) (use no_console_suspend to debug) > [ 152.556234] sd 0:0:0:0: [sda] Synchronizing SCSI cache > [ 152.907091] sd 0:0:0:0: [sda] Stopping disk > [ 153.579824] pci 0000:01:00.0: power state changed by ACPI to D3 > [ 153.594449] e100 0000:00:0a.0: PME# enabled > [ 153.594688] e100 0000:00:0a.0: wake-up capability enabled by ACPI > [ 153.594855] e100 0000:00:0a.0: PCI INT A disabled > [ 153.650834] ALI 5451 0000:00:06.0: PCI INT A disabled > [ 153.663826] ALI 5451 0000:00:06.0: power state changed by ACPI to D3 > [ 154.417072] pata_ali 0000:00:04.0: can't derive routing for PCI INT A > [ 154.430275] ohci_hcd 0000:00:02.0: PME# enabled > [ 154.430490] ohci_hcd 0000:00:02.0: wake-up capability enabled by ACPI > [ 154.430520] ohci_hcd 0000:00:02.0: PCI INT A disabled > [ 154.446867] ACPI: Preparing to enter system sleep state S3 > [ 154.460237] ------------[ cut here ]------------ > [ 154.460250] WARNING: at /home/bor/src/linux- > git/drivers/base/power/main.c:579 device_power_down+0x18f/0x1e0() > [ 154.460259] Hardware name: PORTEGE 4000 > [ 154.460265] Interrupts enabled after 0000:00:02.0! > > The device is > > {pts/2}% lspci -nnv -s 00:02.0 > 00:02.0 USB Controller [0c03]: ALi Corporation USB 1.1 Controller > [10b9:5237] (rev 03) (prog-if 10 [OHCI]) > Subsystem: Toshiba America Info Systems Device [1179:0004] > Flags: bus master, medium devsel, latency 64, IRQ 11 > Memory at f7eff000 (32-bit, non-prefetchable) [size=4K] > Capabilities: <access denied> > Kernel driver in use: ohci_hcd > Kernel modules: ohci-hcd > > and this does not surprise me at all given all the problems I had with this > USB controller. > > Suspicious is > > ohci_hcd 0000:00:02.0: wake-up capability enabled by ACPI > > this controller has history of broken wake up functionality. Ah. Can you please check if the appended patch fixes the issue for you? Rafael --- drivers/usb/core/hcd-pci.c | 116 ++++++++++---------------------------------- drivers/usb/core/hcd.h | 1 drivers/usb/host/ehci-pci.c | 1 drivers/usb/host/ohci-pci.c | 1 drivers/usb/host/uhci-hcd.c | 1 5 files changed, 27 insertions(+), 93 deletions(-) Index: linux-2.6/drivers/usb/core/hcd-pci.c =================================================================== --- linux-2.6.orig/drivers/usb/core/hcd-pci.c +++ linux-2.6/drivers/usb/core/hcd-pci.c @@ -200,6 +200,7 @@ int usb_hcd_pci_suspend(struct pci_dev * struct usb_hcd *hcd = pci_get_drvdata(dev); int retval = 0; int wake, w; + int has_pci_pm; /* Root hub suspend should have stopped all downstream traffic, * and all bus master traffic. And done so for both the interface @@ -229,6 +230,15 @@ int usb_hcd_pci_suspend(struct pci_dev * synchronize_irq(dev->irq); + /* Downstream ports from this root hub should already be quiesced, so + * there will be no DMA activity. Now we can shut down the upstream + * link (except maybe for PME# resume signaling) and enter some PCI + * low power state, if the hardware allows. + */ + pci_disable_device(dev); + + pci_save_state(dev); + /* Don't fail on error to enable wakeup. We rely on pci code * to reject requests the hardware can't implement, rather * than coding the same thing. @@ -240,35 +250,6 @@ int usb_hcd_pci_suspend(struct pci_dev * wake = w; dev_dbg(&dev->dev, "wakeup: %d\n", wake); - /* Downstream ports from this root hub should already be quiesced, so - * there will be no DMA activity. Now we can shut down the upstream - * link (except maybe for PME# resume signaling) and enter some PCI - * low power state, if the hardware allows. - */ - pci_disable_device(dev); - done: - return retval; -} -EXPORT_SYMBOL_GPL(usb_hcd_pci_suspend); - -/** - * usb_hcd_pci_suspend_late - suspend a PCI-based HCD after IRQs are disabled - * @dev: USB Host Controller being suspended - * @message: Power Management message describing this state transition - * - * Store this function in the HCD's struct pci_driver as .suspend_late. - */ -int usb_hcd_pci_suspend_late(struct pci_dev *dev, pm_message_t message) -{ - int retval = 0; - int has_pci_pm; - - /* We might already be suspended (runtime PM -- not yet written) */ - if (dev->current_state != PCI_D0) - goto done; - - pci_save_state(dev); - /* Don't change state if we don't need to */ if (message.event == PM_EVENT_FREEZE || message.event == PM_EVENT_PRETHAW) { @@ -314,7 +295,7 @@ int usb_hcd_pci_suspend_late(struct pci_ done: return retval; } -EXPORT_SYMBOL_GPL(usb_hcd_pci_suspend_late); +EXPORT_SYMBOL_GPL(usb_hcd_pci_suspend); /** * usb_hcd_pci_resume_early - resume a PCI-based HCD before IRQs are enabled @@ -324,65 +305,8 @@ EXPORT_SYMBOL_GPL(usb_hcd_pci_suspend_la */ int usb_hcd_pci_resume_early(struct pci_dev *dev) { - int retval = 0; - pci_power_t state = dev->current_state; - -#ifdef CONFIG_PPC_PMAC - /* Reenable ASIC clocks for USB */ - if (machine_is(powermac)) { - struct device_node *of_node; - - of_node = pci_device_to_OF_node(dev); - if (of_node) - pmac_call_feature(PMAC_FTR_USB_ENABLE, - of_node, 0, 1); - } -#endif - - /* NOTE: chip docs cover clean "real suspend" cases (what Linux - * calls "standby", "suspend to RAM", and so on). There are also - * dirty cases when swsusp fakes a suspend in "shutdown" mode. - */ - if (state != PCI_D0) { -#ifdef DEBUG - int pci_pm; - u16 pmcr; - - pci_pm = pci_find_capability(dev, PCI_CAP_ID_PM); - pci_read_config_word(dev, pci_pm + PCI_PM_CTRL, &pmcr); - pmcr &= PCI_PM_CTRL_STATE_MASK; - if (pmcr) { - /* Clean case: power to USB and to HC registers was - * maintained; remote wakeup is easy. - */ - dev_dbg(&dev->dev, "resume from PCI D%d\n", pmcr); - } else { - /* Clean: HC lost Vcc power, D0 uninitialized - * + Vaux may have preserved port and transceiver - * state ... for remote wakeup from D3cold - * + or not; HCD must reinit + re-enumerate - * - * Dirty: D0 semi-initialized cases with swsusp - * + after BIOS init - * + after Linux init (HCD statically linked) - */ - dev_dbg(&dev->dev, "resume from previous PCI D%d\n", - state); - } -#endif - - retval = pci_set_power_state(dev, PCI_D0); - } else { - /* Same basic cases: clean (powered/not), dirty */ - dev_dbg(&dev->dev, "PCI legacy resume\n"); - } - - if (retval < 0) - dev_err(&dev->dev, "can't resume: %d\n", retval); - else - pci_restore_state(dev); - - return retval; + pci_restore_state(dev); + return 0; } EXPORT_SYMBOL_GPL(usb_hcd_pci_resume_early); @@ -397,6 +321,18 @@ int usb_hcd_pci_resume(struct pci_dev *d struct usb_hcd *hcd; int retval; +#ifdef CONFIG_PPC_PMAC + /* Reenable ASIC clocks for USB */ + if (machine_is(powermac)) { + struct device_node *of_node; + + of_node = pci_device_to_OF_node(dev); + if (of_node) + pmac_call_feature(PMAC_FTR_USB_ENABLE, + of_node, 0, 1); + } +#endif + hcd = pci_get_drvdata(dev); if (hcd->state != HC_STATE_SUSPENDED) { dev_dbg(hcd->self.controller, @@ -404,6 +340,8 @@ int usb_hcd_pci_resume(struct pci_dev *d return 0; } + pci_enable_wake(dev, PCI_D0, false); + retval = pci_enable_device(dev); if (retval < 0) { dev_err(&dev->dev, "can't re-enable after resume, %d!\n", Index: linux-2.6/drivers/usb/core/hcd.h =================================================================== --- linux-2.6.orig/drivers/usb/core/hcd.h +++ linux-2.6/drivers/usb/core/hcd.h @@ -257,7 +257,6 @@ extern void usb_hcd_pci_remove(struct pc #ifdef CONFIG_PM extern int usb_hcd_pci_suspend(struct pci_dev *dev, pm_message_t msg); -extern int usb_hcd_pci_suspend_late(struct pci_dev *dev, pm_message_t msg); extern int usb_hcd_pci_resume_early(struct pci_dev *dev); extern int usb_hcd_pci_resume(struct pci_dev *dev); #endif /* CONFIG_PM */ Index: linux-2.6/drivers/usb/host/ehci-pci.c =================================================================== --- linux-2.6.orig/drivers/usb/host/ehci-pci.c +++ linux-2.6/drivers/usb/host/ehci-pci.c @@ -432,7 +432,6 @@ static struct pci_driver ehci_pci_driver #ifdef CONFIG_PM .suspend = usb_hcd_pci_suspend, - .suspend_late = usb_hcd_pci_suspend_late, .resume_early = usb_hcd_pci_resume_early, .resume = usb_hcd_pci_resume, #endif Index: linux-2.6/drivers/usb/host/ohci-pci.c =================================================================== --- linux-2.6.orig/drivers/usb/host/ohci-pci.c +++ linux-2.6/drivers/usb/host/ohci-pci.c @@ -487,7 +487,6 @@ static struct pci_driver ohci_pci_driver #ifdef CONFIG_PM .suspend = usb_hcd_pci_suspend, - .suspend_late = usb_hcd_pci_suspend_late, .resume_early = usb_hcd_pci_resume_early, .resume = usb_hcd_pci_resume, #endif Index: linux-2.6/drivers/usb/host/uhci-hcd.c =================================================================== --- linux-2.6.orig/drivers/usb/host/uhci-hcd.c +++ linux-2.6/drivers/usb/host/uhci-hcd.c @@ -942,7 +942,6 @@ static struct pci_driver uhci_pci_driver #ifdef CONFIG_PM .suspend = usb_hcd_pci_suspend, - .suspend_late = usb_hcd_pci_suspend_late, .resume_early = usb_hcd_pci_resume_early, .resume = usb_hcd_pci_resume, #endif /* PM */ -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
