lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

USB: EHCI: use the new clear_tt_buffer interface

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/usb/host/ehci.h
View File

@@ -354,7 +354,9 @@ struct ehci_qh {
unsigned short period; /* polling interval */
unsigned short start; /* where polling starts */
#define NO_FRAME ((unsigned short)~0) /* pick new start */
struct usb_device *dev; /* access to TT */
unsigned clearing_tt:1; /* Clear-TT-Buf in progress */
} __attribute__ ((aligned (32)));
/*-------------------------------------------------------------------------*/