diff options
| author | Gabe Black <gabeblack@google.com> | 2012-11-21 02:16:13 -0800 |
|---|---|---|
| committer | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2013-02-28 01:25:46 +0100 |
| commit | ef650a5d2456196d653667de7d02abc0591ec024 (patch) | |
| tree | 877a62eea8c4eaecb3f998b4ad6bb46c763beb93 /payloads/libpayload/drivers | |
| parent | 1cca340942957009ad74e24ef04bdd5eb44aabaf (diff) | |
libpayload: Check for completion more often in ehci_set_periodic_schedule.
This function was using mdelay in a loop to check for the completion of an USB
controller operation. Since we're busy waiting anyway, we might as well wait
only 1 us before checking again and potentially seeing the completion 999 us
earlier than we would otherwise.
Change-Id: I177b303c5503a0078c608d5f945c395691d4bd8a
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: http://review.coreboot.org/2522
Tested-by: build bot (Jenkins)
Reviewed-by: Dave Frodin <dave.frodin@se-eng.com>
Reviewed-by: Anton Kochkov <anton.kochkov@gmail.com>
Diffstat (limited to 'payloads/libpayload/drivers')
| -rw-r--r-- | payloads/libpayload/drivers/usb/ehci.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/payloads/libpayload/drivers/usb/ehci.c b/payloads/libpayload/drivers/usb/ehci.c index 3e57902c70..ec33b18216 100644 --- a/payloads/libpayload/drivers/usb/ehci.c +++ b/payloads/libpayload/drivers/usb/ehci.c @@ -157,10 +157,10 @@ static int ehci_set_periodic_schedule(ehci_t *ehcic, int enable) * This shouldn't take too long, but we should timeout nevertheless. */ enable = enable ? HC_OP_PERIODIC_SCHED_STAT : 0; - int timeout = 100; /* time out after 100ms */ + int timeout = 100000; /* time out after 100ms */ while (((ehcic->operation->usbsts & HC_OP_PERIODIC_SCHED_STAT) != enable) && timeout--) - mdelay(1); + udelay(1); if (timeout < 0) { usb_debug("ehci periodic schedule status change timed out.\n"); return 1; |