From: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Date: Mon, 15 Jun 2015 08:25:16 +0000 (+0900)
Subject: dmaengine: pl330: Fix overflow when reporting residue in memcpy
X-Git-Tag: omap-for-v4.3/fixes-merge-window~155^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ae128293d97404f491dc76f1843c7adacfec3441;p=pandora-kernel.git

dmaengine: pl330: Fix overflow when reporting residue in memcpy

During memcpy operations the residue was always set to an u32 overflowed
value.

In pl330_tx_status() function number of currently transferred bytes was
subtracted from internal "bytes_requested" field. However this
"bytes_requested" was not initialized at start to length of memcpy
buffer so transferred bytes were subtracted from 0 causing overflow.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: <stable@vger.kernel.org>
Fixes: aee4d1fac887 ("dmaengine: pl330: improve pl330_tx_status() function")
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
---

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