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USB: ehci: fix audio record functionality for some Full speed sound blaster devices 

This patch fix audio record functionality for some Full speed sound blaster devices.
Issue: Sometimes transaction complete indication is coming from HW one frame later.
Solution: If scan_periodic process now frame or previous frame now-1 and sitd transaction
is not finished yet, exit scan_periodic function and check the same transaction in the next frame.

Signed-off-by: Dimitry Epshtein <dima@marvell.com>
Signed-off-by: Saeed Bishara <saeed@marvell.com>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Dmitri Epshtein 2009-12-14 17:17:34 +02:00 committed by Greg Kroah-Hartman
parent d63c66d2d0
commit 22e186948a
1 changed files with 7 additions and 3 deletions
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10
drivers/usb/host/ehci-sched.c
View File

@ -2324,9 +2324,13 @@ restart:
* No need to check for activity unless the * No need to check for activity unless the
* frame is current. * frame is current.
*/ */
if (frame == clock_frame && live && if (((frame == clock_frame) ||
(q.sitd->hw_results & (((frame + 1) % ehci->periodic_size)
SITD_ACTIVE(ehci))) { == clock_frame))
&& live
&& (q.sitd->hw_results &
SITD_ACTIVE(ehci))) {
incomplete = true; incomplete = true;
q_p = &q.sitd->sitd_next; q_p = &q.sitd->sitd_next;
hw_p = &q.sitd->hw_next; hw_p = &q.sitd->hw_next;