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authorKrzysztof Kozlowski <k.kozlowski@samsung.com>2015-06-15 17:25:16 +0900
committerVinod Koul <vinod.koul@intel.com>2015-07-07 09:27:53 +0530
commitae128293d97404f491dc76f1843c7adacfec3441 (patch)
tree661e782b5dd0259eefeeccf26a8332e6a940b6b8
parentd770e558e21961ad6cfdf0ff7df0eb5d7d4f0754 (diff)
downloadlinux-ae128293d97404f491dc76f1843c7adacfec3441.tar.bz2
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>
-rw-r--r--drivers/dma/pl330.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index f513f77b1d85..c535cd059724 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -2623,6 +2623,7 @@ pl330_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dst,
desc->rqcfg.brst_len = 1;
desc->rqcfg.brst_len = get_burst_len(desc, len);
+ desc->bytes_requested = len;
desc->txd.flags = flags;