The patch titled
UHCI: don't test the Short Packet Detect bit
has been added to the -mm tree. Its filename is
uhci-dont-test-the-short-packet-detect-bit.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: UHCI: don't test the Short Packet Detect bit
From: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Apparently some UHCI controllers change the value of the Short Packet
Detect (SPD) bit in the TD status word -- presumably when they receive a
short packet. This patch (as759) changes uhci-hcd to avoid assuming that
the bit is unchanged; in fact, the driver no longer looks at SPD at all.
This fixes the second problem reported in Bugzilla #6752.
Signed-off-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Cc: Greg KH <greg@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/usb/host/uhci-q.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff -puN drivers/usb/host/uhci-q.c~uhci-dont-test-the-short-packet-detect-bit drivers/usb/host/uhci-q.c
--- a/drivers/usb/host/uhci-q.c~uhci-dont-test-the-short-packet-detect-bit
+++ a/drivers/usb/host/uhci-q.c
@@ -943,7 +943,9 @@ static int uhci_result_common(struct uhc
/* We received a short packet */
if (urb->transfer_flags & URB_SHORT_NOT_OK)
ret = -EREMOTEIO;
- else if (ctrlstat & TD_CTRL_SPD)
+
+ /* Fixup needed only if this isn't the URB's last TD */
+ else if (&td->list != urbp->td_list.prev)
ret = 1;
}
_
Patches currently in -mm which might be from stern@xxxxxxxxxxxxxxxxxxx are
uhci-dont-test-the-short-packet-detect-bit.patch
e100-disable-interrupts-at-boot.patch
usb-hub-driver-improve-use-of-ifdef-fix.patch
block-layer-early-detection-of-medium-not-present.patch
scsi-core-and-sd-early-detection-of-medium-not-present.patch
sd-early-detection-of-medium-not-present.patch
scsi-early-detection-of-medium-not-present-updated.patch
add-srcu-based-notifier-chains.patch
-
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