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| author | Krzysztof Kozlowski <k.kozlowski@samsung.com> | 2015-06-15 10:25:16 +0200 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2015-07-07 05:57:53 +0200 |
| commit | ae128293d97404f491dc76f1843c7adacfec3441 (patch) | |
| tree | 661e782b5dd0259eefeeccf26a8332e6a940b6b8 /drivers/dma/pl330.c | |
| parent | Linux 4.2-rc1 (diff) | |
| download | linux-ae128293d97404f491dc76f1843c7adacfec3441.tar.xz linux-ae128293d97404f491dc76f1843c7adacfec3441.zip | |
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>
Diffstat (limited to 'drivers/dma/pl330.c')
| -rw-r--r-- | drivers/dma/pl330.c | 1 |
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; |