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authorAlan Stern <stern@rowland.harvard.edu>2010-04-08 16:56:37 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2010-04-22 15:18:28 -0700
commit0e5f231bc16ff9910882fa5b9d64d80e7691cfab (patch)
tree6312287dcfdd99634ce9027f6ba08e087c124b0e /drivers/usb/host/ehci.h
parent5f677f1d45b2bf08085bbba7394392dfa586fa8e (diff)
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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 <stern@rowland.harvard.edu> Tested-by: Nate Case <ncase@xes-inc.com> CC: <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host/ehci.h')
-rw-r--r--drivers/usb/host/ehci.h5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
index b1dce96dd62..556c0b48f3a 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);
/*-------------------------------------------------------------------------*/