Hello. On 21-06-2013 15:00, Denis V. Lunev wrote:
From: Konstantin Filatov <kfilatov@xxxxxxxxxxxxx>
Commit 689d6eac
Please also specify that commit's summary line in parens.
introduced an implementation of scatter-gather list for UHCI. This implementation has a bug in case when a non-last sg element was not aligned by TD's max-pkt-size. This bug was latent till commit 2851784f
And this one too.
which initializes sg_table and enables using the implementation.
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 crashes with SIGBUS.
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> CC: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> CC: linux-usb@xxxxxxxxxxxxxxx
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