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authorKrzysztof Kozlowski <k.kozlowski@samsung.com>2015-06-15 17:25:16 +0900
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-08-16 20:52:11 -0700
commit9cd4b78cd56489755fcba685b5e1a243cea6e6cf (patch)
tree63e2e25339f989f6b44ad883aeccf0fec3593dc2 /drivers/dma
parent4e200fcacc37eebe93acfc3d751b6b7b79bf85a1 (diff)
dmaengine: pl330: Fix overflow when reporting residue in memcpy
commit ae128293d97404f491dc76f1843c7adacfec3441 upstream. 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> Fixes: aee4d1fac887 ("dmaengine: pl330: improve pl330_tx_status() function") Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/dma')
-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 340f9e607cd8..8652388e77d6 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -2621,6 +2621,7 @@ 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;