linux-kernel - staging: Unwritten function for ion_carveout

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Date:	Wed, 23 Jul 2014 16:04:07 -0400
From:	Nick Krause <xerofoify@...il.com>
To:	Greg KH <gregkh@...uxfoundation.org>
Cc:	john.stultz@...aro.org, ccross@...roid.com, rebecca@...roid.com,
	Laura Abbott <lauraa@...eaurora.org>, gioh.kim@....com,
	benjamin.gaignard@...aro.org, devel@...verdev.osuosl.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: staging: Unwritten function for ion_carveout_heap.c

Hey Greg and others.
Sorry for another email but it seems the function,
ion_carveout_heap_unmap_dma is
just returning and not doing anything useful. Furthermore I am new so
I don't known how
to write this function but this may  be causing  some rather  serious
bugs as if the dma heap
is not unmaped and we  call this function a lot this will make the
kernel not able to handle dma requests
for this driver and other drivers that need this and in turn lead to
a oops or even a kernel panic due to leaked
dma allocated memory. I would recommend writing this function or
helping me write it in
other to avoid some rather serious bugs without a proper dma unmapping
function for this driver  :).
Nick
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