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USB: EHCI: use the new clear_tt_buffer interface

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This patch (as1256) changes ehci-hcd and all the other drivers in the
EHCI family to make use of the new clear_tt_buffer callbacks.  When a
Clear-TT-Buffer request is in progress for a QH, the QH is not allowed
to be linked into the async schedule until the request is finished.
At that time, if there are any URBs queued for the QH, it is linked
into the async schedule.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern
2009-06-29 10:47:30 -04:00
committed by Greg Kroah-Hartman
parent cb88a1b887
commit 914b701280
10 changed files with 86 additions and 23 deletions
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2
drivers/usb/host/ehci-hcd.c
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@@ -1003,6 +1003,8 @@ idle_timeout:
schedule_timeout_uninterruptible(1);
goto rescan;
case QH_STATE_IDLE: /* fully unlinked */
if (qh->clearing_tt)
goto idle_timeout;
if (list_empty (&qh->qtd_list)) {
qh_put (qh);
break;