On 6/24/13 6:35 PM, Felipe Balbi wrote:
Hi,
On Mon, Jun 24, 2013 at 06:31:07PM +0400, Denis V. Lunev wrote:
with a length that isn't multiply by max pkt size for this endpoint.
The commit 689d6eac (USB: UHCI: add native scatter-gather support(v1))
introduced an implementation of scatter-gather list for UHCI.
This implementation has a bug when the size of a non-last sg
element was not multiply by TD's max-pkt-size. This bug was latent
till the commit 2851784f (usb/uhci: initialize sg_table properly)
which really initializes sg_table and enables SG lists in UHCI.
The bug can be easily reproduced with Gadget Zero in full_speed mode
connected to a host with UHCI controller by the standard test from
tools/usb/ with command line
testusb -a -t 7 -c 2000 -s 4096 -v 41
The test sends trash bytes to the gadget instead of only zero bytes
and so the test fails.
This patch shortens TD's packet not only for the last TD in sg list,
but also for the last TD in sg element.
Signed-off-by: Konstantin Filatov <kfilatov@xxxxxxxxxxxxx>
Signed-off-by: Denis V. Lunev <den@xxxxxxxxxx>
Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
CC: Ming Lei <tom.leiming@xxxxxxxxx>
CC: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
CC: linux-usb@xxxxxxxxxxxxxxx
this is not the correct way to send a patch. Subject line is wrong,
please fix that.
yep, sorry, fixed already.
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
