From 0e5f231bc16ff9910882fa5b9d64d80e7691cfab Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Thu, 8 Apr 2010 16:56:37 -0400 Subject: USB: EHCI: defer reclamation of siTDs This patch (as1369) fixes a problem in ehci-hcd. Some controllers occasionally run into trouble when the driver reclaims siTDs too quickly. This can happen while streaming audio; it causes the controller to crash. The patch changes siTD reclamation to work the same way as iTD reclamation: Completed siTDs are stored on a list and not reused until at least one frame has passed. Signed-off-by: Alan Stern Tested-by: Nate Case CC: Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/ehci.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'drivers/usb/host/ehci.h') diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h index b1dce96dd621..556c0b48f3ab 100644 --- a/drivers/usb/host/ehci.h +++ b/drivers/usb/host/ehci.h @@ -87,8 +87,9 @@ struct ehci_hcd { /* one per controller */ int next_uframe; /* scan periodic, start here */ unsigned periodic_sched; /* periodic activity count */ - /* list of itds completed while clock_frame was still active */ + /* list of itds & sitds completed while clock_frame was still active */ struct list_head cached_itd_list; + struct list_head cached_sitd_list; unsigned clock_frame; /* per root hub port */ @@ -195,7 +196,7 @@ timer_action_done (struct ehci_hcd *ehci, enum ehci_timer_action action) clear_bit (action, &ehci->actions); } -static void free_cached_itd_list(struct ehci_hcd *ehci); +static void free_cached_lists(struct ehci_hcd *ehci); /*-------------------------------------------------------------------------*/ -- cgit v1.2.1