dmaengine: pl330: Fix overflow when reporting residue in memcpy
authorKrzysztof Kozlowski <k.kozlowski@samsung.com>
Mon, 15 Jun 2015 08:25:16 +0000 (17:25 +0900)
committerVinod Koul <vinod.koul@intel.com>
Tue, 7 Jul 2015 03:57:53 +0000 (09:27 +0530)
commitae128293d97404f491dc76f1843c7adacfec3441
tree661e782b5dd0259eefeeccf26a8332e6a940b6b8
parentd770e558e21961ad6cfdf0ff7df0eb5d7d4f0754
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>
drivers/dma/pl330.c