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| author | Alan Stern <stern@rowland.harvard.edu> | 2009-04-27 17:33:41 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-06-16 04:44:44 (GMT) |
| commit | 6ec4beb5c701f728548b587082c83ef62eb36035 (patch) | |
| tree | c5450f6e40f3656b5e27a0ca30adda2a16ad303f /drivers/usb/core | |
| parent | abb306416a7ec2386678de0da6b632a6cb068af0 (diff) | |
| download | linux-fsl-qoriq-6ec4beb5c701f728548b587082c83ef62eb36035.tar.xz | |
USB: new flag for resume-from-hibernation
This patch (as1237) changes the way the PCI host controller drivers
avoid retaining bogus hardware states during resume-from-hibernation.
Previously we had reset the hardware as part of preparing to reinstate
the memory image. But we can do better now with the new PM framework,
since we know exactly which resume operations are from hibernation.
The pci_resume method is changed to accept a flag indicating whether
the system is resuming from hibernation. When this flag is set, the
drivers will reset the hardware to get rid of any existing state.
Similarly, the pci_suspend method is changed to remove the
pm_message_t argument. It's no longer needed, since no special action
has to be taken when preparing to reinstate the memory image.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/core')
| -rw-r--r-- | drivers/usb/core/hcd-pci.c | 4 | ||||
| -rw-r--r-- | drivers/usb/core/hcd.h | 4 |
2 files changed, 4 insertions, 4 deletions
diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c index 5db4d40..91f2885 100644 --- a/drivers/usb/core/hcd-pci.c +++ b/drivers/usb/core/hcd-pci.c @@ -237,7 +237,7 @@ static int hcd_pci_suspend(struct device *dev) return retval; if (hcd->driver->pci_suspend) { - retval = hcd->driver->pci_suspend(hcd, PMSG_SUSPEND); + retval = hcd->driver->pci_suspend(hcd); suspend_report_result(hcd->driver->pci_suspend, retval); if (retval) return retval; @@ -344,7 +344,7 @@ static int resume_common(struct device *dev, bool hibernated) clear_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); if (hcd->driver->pci_resume) { - retval = hcd->driver->pci_resume(hcd); + retval = hcd->driver->pci_resume(hcd, hibernated); if (retval) { dev_err(dev, "PCI post-resume error %d!\n", retval); usb_hc_died(hcd); diff --git a/drivers/usb/core/hcd.h b/drivers/usb/core/hcd.h index 7f068d6..174170f 100644 --- a/drivers/usb/core/hcd.h +++ b/drivers/usb/core/hcd.h @@ -182,10 +182,10 @@ struct hc_driver { * a whole, not just the root hub; they're for PCI bus glue. */ /* called after suspending the hub, before entering D3 etc */ - int (*pci_suspend) (struct usb_hcd *hcd, pm_message_t message); + int (*pci_suspend)(struct usb_hcd *hcd); /* called after entering D0 (etc), before resuming the hub */ - int (*pci_resume) (struct usb_hcd *hcd); + int (*pci_resume)(struct usb_hcd *hcd, bool hibernated); /* cleanly make HCD stop writing memory and doing I/O */ void (*stop) (struct usb_hcd *hcd); |