From: Alan Stern <stern@rowland.harvard.edu>
Date: Thu, 6 Jan 2011 15:17:09 +0000 (-0500)
Subject: USB: EHCI: fix DMA deallocation bug
X-Git-Tag: v2.6.37.1~248
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a76a1ca75a098183f2029fda1da489a6e57d1625;p=pandora-kernel.git

USB: EHCI: fix DMA deallocation bug

commit f75593ceaa08e6d27aec1a5de31cded19e850dd1 upstream.

This patch (as1440) fixes a bug in ehci-hcd.  ehci->periodic_size is
used to compute the size in a dma_alloc_coherent() call, but then it
gets changed later on.  As a result, the corresponding call to
dma_free_coherent() passes a different size from the original
allocation.  Fix the problem by adjusting ehci->periodic_size before
carrying out any of the memory allocations.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Larry Finger <Larry.Finger@lwfinger.net>
CC: David Brownell <david-b@pacbell.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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