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;
 }