diff options
| author | David Brownell <david-b@pacbell.net> | 2005-11-23 15:45:28 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-23 23:04:28 -0800 |
| commit | f03c17fc9abe8582d6ad830290b3093fdf1eea61 (patch) | |
| tree | b110f763ddf4043ef1b994ea2f284d02f6039921 /drivers/usb/host/ehci-hub.c | |
| parent | b4723ae3cc66fd067a8e661b5c05d5bd41be29b5 (diff) | |
[PATCH] USB: EHCI updates
This fixes some bugs in EHCI suspend/resume that joined us over the past
few releases (as usbcore, PCI, pmcore, and other components evolved):
- Removes suspend and resume recursion from the EHCI driver, getting
rid of the USB_SUSPEND special casing.
- Updates the wakeup mechanism to work again; there's a newish usbcore
call it needs to use.
- Provide simpler tests for "do we need to restart from scratch", to
address another case where PCI Vaux was lost. (In this case it was
restoring a swsusp snapshot, but there could be others.)
Un-exports a symbol that was temporarily exported.
A notable change from previous version is that this doesn't move
the spinlock init, so there's still a resume/reinit path bug.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/usb/host/ehci-hub.c')
| -rw-r--r-- | drivers/usb/host/ehci-hub.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c index 88cb4ada686..82caf336e9b 100644 --- a/drivers/usb/host/ehci-hub.c +++ b/drivers/usb/host/ehci-hub.c @@ -94,6 +94,13 @@ static int ehci_bus_resume (struct usb_hcd *hcd) msleep(5); spin_lock_irq (&ehci->lock); + /* Ideally and we've got a real resume here, and no port's power + * was lost. (For PCI, that means Vaux was maintained.) But we + * could instead be restoring a swsusp snapshot -- so that BIOS was + * the last user of the controller, not reset/pm hardware keeping + * state we gave to it. + */ + /* re-init operational registers in case we lost power */ if (readl (&ehci->regs->intr_enable) == 0) { /* at least some APM implementations will try to deliver |