diff options
Diffstat (limited to 'drivers/usb/host/ehci-timer.c')
| -rw-r--r-- | drivers/usb/host/ehci-timer.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-timer.c b/drivers/usb/host/ehci-timer.c index 0e28bae78d18..eb896a2c8f2e 100644 --- a/drivers/usb/host/ehci-timer.c +++ b/drivers/usb/host/ehci-timer.c @@ -76,6 +76,7 @@ static unsigned event_delays_ns[] = { 10 * NSEC_PER_MSEC, /* EHCI_HRTIMER_IAA_WATCHDOG */ 10 * NSEC_PER_MSEC, /* EHCI_HRTIMER_DISABLE_PERIODIC */ 15 * NSEC_PER_MSEC, /* EHCI_HRTIMER_DISABLE_ASYNC */ + 100 * NSEC_PER_MSEC, /* EHCI_HRTIMER_IO_WATCHDOG */ }; /* Enable a pending hrtimer event */ @@ -332,6 +333,25 @@ static void ehci_iaa_watchdog(struct ehci_hcd *ehci) } +/* Enable the I/O watchdog, if appropriate */ +static void turn_on_io_watchdog(struct ehci_hcd *ehci) +{ + /* Not needed if the controller isn't running or it's already enabled */ + if (ehci->rh_state != EHCI_RH_RUNNING || + (ehci->enabled_hrtimer_events & + BIT(EHCI_HRTIMER_IO_WATCHDOG))) + return; + + /* + * Isochronous transfers always need the watchdog. + * For other sorts we use it only if the flag is set. + */ + if (ehci->isoc_count > 0 || (ehci->need_io_watchdog && + ehci->async_count + ehci->intr_count > 0)) + ehci_enable_event(ehci, EHCI_HRTIMER_IO_WATCHDOG, true); +} + + /* * Handler functions for the hrtimer event types. * Keep this array in the same order as the event types indexed by @@ -347,6 +367,7 @@ static void (*event_handlers[])(struct ehci_hcd *) = { ehci_iaa_watchdog, /* EHCI_HRTIMER_IAA_WATCHDOG */ ehci_disable_PSE, /* EHCI_HRTIMER_DISABLE_PERIODIC */ ehci_disable_ASE, /* EHCI_HRTIMER_DISABLE_ASYNC */ + ehci_work, /* EHCI_HRTIMER_IO_WATCHDOG */ }; static enum hrtimer_restart ehci_hrtimer_func(struct hrtimer *t) |