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| author | Wolfram Sang <w.sang@pengutronix.de> | 2012-10-08 12:46:32 +0200 |
|---|---|---|
| committer | Wolfram Sang <w.sang@pengutronix.de> | 2012-10-08 12:46:32 +0200 |
| commit | 102084d3d3969646cc89ea159e50898aeafc6649 (patch) | |
| tree | e92924469b3fab3ee6fa29e338e0a3a4cb167e82 /drivers/dma/at_hdmac.c | |
| parent | i2c: add Renesas R-Car I2C driver (diff) | |
| parent | Linux 3.6-rc7 (diff) | |
| download | linux-102084d3d3969646cc89ea159e50898aeafc6649.tar.xz linux-102084d3d3969646cc89ea159e50898aeafc6649.zip | |
Merge tag 'v3.6-rc7' into i2c-embedded/for-next
Linux 3.6-rc7
Needed to get updates from i2c-embedded/for-current into i2c-embedded/for-next
Diffstat (limited to 'drivers/dma/at_hdmac.c')
| -rw-r--r-- | drivers/dma/at_hdmac.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c index 3934fcc4e00b..7ab6e26664a7 100644 --- a/drivers/dma/at_hdmac.c +++ b/drivers/dma/at_hdmac.c @@ -661,7 +661,7 @@ atc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, flags); if (unlikely(!atslave || !sg_len)) { - dev_dbg(chan2dev(chan), "prep_dma_memcpy: length is zero!\n"); + dev_dbg(chan2dev(chan), "prep_slave_sg: sg length is zero!\n"); return NULL; } @@ -689,6 +689,11 @@ atc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, mem = sg_dma_address(sg); len = sg_dma_len(sg); + if (unlikely(!len)) { + dev_dbg(chan2dev(chan), + "prep_slave_sg: sg(%d) data length is zero\n", i); + goto err; + } mem_width = 2; if (unlikely(mem & 3 || len & 3)) mem_width = 0; @@ -724,6 +729,11 @@ atc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, mem = sg_dma_address(sg); len = sg_dma_len(sg); + if (unlikely(!len)) { + dev_dbg(chan2dev(chan), + "prep_slave_sg: sg(%d) data length is zero\n", i); + goto err; + } mem_width = 2; if (unlikely(mem & 3 || len & 3)) mem_width = 0; @@ -757,6 +767,7 @@ atc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, err_desc_get: dev_err(chan2dev(chan), "not enough descriptors available\n"); +err: atc_desc_put(atchan, first); return NULL; } |