From: Pete Zaitcev <zaitcev@redhat.com>
Date: Fri, 14 Nov 2008 16:47:41 +0000 (-0700)
Subject: USB: usbmon: fix read(2)
X-Git-Tag: v2.6.28-rc6~2^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f1c0a2a3aff53698f4855968d576464041d49b39;p=pandora-kernel.git

USB: usbmon: fix read(2)

There's a bug in the usbmon binary reader: When using read() to fetch
the packets and a packet's data is partially read, the next read call
will once again return up to len_cap bytes of data. The b_read counter
is not regarded when determining the remaining chunk size.

So, when dumping USB data with "cat /dev/usbmon0 > usbmon.trace" while
reading from a USB storage device and analyzing the dump file
afterwards it will get out of sync after a couple of packets.

Signed-off-by: Ingo van Lil <inguin@gmx.de>
Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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