diff options
Diffstat (limited to 'drivers/crypto/caam/sg_sw_sec4.h')
| -rw-r--r-- | drivers/crypto/caam/sg_sw_sec4.h | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/drivers/crypto/caam/sg_sw_sec4.h b/drivers/crypto/caam/sg_sw_sec4.h index 62bdf16..0dca376 100644 --- a/drivers/crypto/caam/sg_sw_sec4.h +++ b/drivers/crypto/caam/sg_sw_sec4.h @@ -33,7 +33,10 @@ static inline struct sec4_sg_entry * sg_to_sec4_sg(struct scatterlist *sg, int sg_count, struct sec4_sg_entry *sec4_sg_ptr, u16 offset) { - while (sg_count) { + if (!sg) + return NULL; + + while (sg_count && sg) { dma_to_sec4_sg_one(sec4_sg_ptr, sg_dma_address(sg), sg_dma_len(sg), offset); sec4_sg_ptr++; @@ -51,6 +54,8 @@ static inline void sg_to_sec4_sg_last(struct scatterlist *sg, int sg_count, struct sec4_sg_entry *sec4_sg_ptr, u16 offset) { + if (!sg) + return; sec4_sg_ptr = sg_to_sec4_sg(sg, sg_count, sec4_sg_ptr, offset); sec4_sg_ptr->len |= SEC4_SG_LEN_FIN; } @@ -89,9 +94,12 @@ static int dma_map_sg_chained(struct device *dev, struct scatterlist *sg, unsigned int nents, enum dma_data_direction dir, bool chained) { + if (!sg || !nents) + return 0; + if (unlikely(chained)) { int i; - for (i = 0; i < nents; i++) { + for (i = 0; i < nents && sg; i++) { dma_map_sg(dev, sg, 1, dir); sg = scatterwalk_sg_next(sg); } @@ -105,9 +113,12 @@ static int dma_unmap_sg_chained(struct device *dev, struct scatterlist *sg, unsigned int nents, enum dma_data_direction dir, bool chained) { + if (!sg || !nents) + return; + if (unlikely(chained)) { int i; - for (i = 0; i < nents; i++) { + for (i = 0; i < nents && sg; i++) { dma_unmap_sg(dev, sg, 1, dir); sg = scatterwalk_sg_next(sg); } |