diff options
| author | Alan Stern <stern@rowland.harvard.edu> | 2012-07-11 11:22:31 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-07-16 16:54:25 -0700 |
| commit | bf6387bcd16975ba8952b094f262a359d74e1c8a (patch) | |
| tree | ac578ff256a5cd972c5866525c65e44e4360974e /drivers/usb/host/ehci.h | |
| parent | df2022553dd8d34d49e16c19d851ea619438f0ef (diff) | |
USB: EHCI: use hrtimer for controller death
This patch (as1578) adds an hrtimer event to handle the death of an
EHCI controller. When a controller dies, it doesn't necessarily stop
running right away. The new event polls at 1-ms intervals to see when
all activity has safely stopped. This replaces a busy-wait polling
loop in the current code.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/ehci.h')
| -rw-r--r-- | drivers/usb/host/ehci.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h index f36f1f85d7fd..6874d89b0b64 100644 --- a/drivers/usb/host/ehci.h +++ b/drivers/usb/host/ehci.h @@ -81,6 +81,7 @@ enum ehci_rh_state { enum ehci_hrtimer_event { EHCI_HRTIMER_POLL_ASS, /* Poll for async schedule off */ EHCI_HRTIMER_POLL_PSS, /* Poll for periodic schedule off */ + EHCI_HRTIMER_POLL_DEAD, /* Wait for dead controller to stop */ EHCI_HRTIMER_UNLINK_INTR, /* Wait for interrupt QH unlink */ EHCI_HRTIMER_DISABLE_PERIODIC, /* Wait to disable periodic sched */ EHCI_HRTIMER_DISABLE_ASYNC, /* Wait to disable async sched */ @@ -97,6 +98,7 @@ struct ehci_hcd { /* one per controller */ int PSS_poll_count; int ASS_poll_count; + int died_poll_count; /* glue to PCI and HCD framework */ struct ehci_caps __iomem *caps; |