diff options
| author | Peter Harliman Liem <pliem@maxlinear.com> | 2022-09-13 11:03:47 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2022-09-24 11:14:42 +0300 |
| commit | 49186a7d9e46ff132a0ed9b721ad6b6a58dba6c1 (patch) | |
| tree | b52b060e162e47a32c507096385def1cd60437b1 /drivers/crypto | |
| parent | 072d36eefd6fde17928d214df64fdac32f60b4f4 (diff) | |
| download | linux-49186a7d9e46ff132a0ed9b721ad6b6a58dba6c1.tar.xz | |
crypto: inside_secure - Avoid dma map if size is zero
From commit d03c54419274 ("dma-mapping: disallow .map_sg
operations from returning zero on error"), dma_map_sg()
produces warning if size is 0. This results in visible
warnings if crypto length is zero.
To avoid that, we avoid calling dma_map_sg if size is zero.
Signed-off-by: Peter Harliman Liem <pliem@maxlinear.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
| -rw-r--r-- | drivers/crypto/inside-secure/safexcel_cipher.c | 44 |
1 files changed, 31 insertions, 13 deletions
diff --git a/drivers/crypto/inside-secure/safexcel_cipher.c b/drivers/crypto/inside-secure/safexcel_cipher.c index d68ef16650d4..5a222c228c3b 100644 --- a/drivers/crypto/inside-secure/safexcel_cipher.c +++ b/drivers/crypto/inside-secure/safexcel_cipher.c @@ -642,10 +642,16 @@ static int safexcel_handle_req_result(struct safexcel_crypto_priv *priv, int rin safexcel_complete(priv, ring); if (src == dst) { - dma_unmap_sg(priv->dev, src, sreq->nr_src, DMA_BIDIRECTIONAL); + if (sreq->nr_src > 0) + dma_unmap_sg(priv->dev, src, sreq->nr_src, + DMA_BIDIRECTIONAL); } else { - dma_unmap_sg(priv->dev, src, sreq->nr_src, DMA_TO_DEVICE); - dma_unmap_sg(priv->dev, dst, sreq->nr_dst, DMA_FROM_DEVICE); + if (sreq->nr_src > 0) + dma_unmap_sg(priv->dev, src, sreq->nr_src, + DMA_TO_DEVICE); + if (sreq->nr_dst > 0) + dma_unmap_sg(priv->dev, dst, sreq->nr_dst, + DMA_FROM_DEVICE); } /* @@ -737,23 +743,29 @@ static int safexcel_send_req(struct crypto_async_request *base, int ring, max(totlen_src, totlen_dst)); return -EINVAL; } - dma_map_sg(priv->dev, src, sreq->nr_src, DMA_BIDIRECTIONAL); + if (sreq->nr_src > 0) + dma_map_sg(priv->dev, src, sreq->nr_src, + DMA_BIDIRECTIONAL); } else { if (unlikely(totlen_src && (sreq->nr_src <= 0))) { dev_err(priv->dev, "Source buffer not large enough (need %d bytes)!", totlen_src); return -EINVAL; } - dma_map_sg(priv->dev, src, sreq->nr_src, DMA_TO_DEVICE); + + if (sreq->nr_src > 0) + dma_map_sg(priv->dev, src, sreq->nr_src, DMA_TO_DEVICE); if (unlikely(totlen_dst && (sreq->nr_dst <= 0))) { dev_err(priv->dev, "Dest buffer not large enough (need %d bytes)!", totlen_dst); - dma_unmap_sg(priv->dev, src, sreq->nr_src, - DMA_TO_DEVICE); - return -EINVAL; + ret = -EINVAL; + goto unmap; } - dma_map_sg(priv->dev, dst, sreq->nr_dst, DMA_FROM_DEVICE); + + if (sreq->nr_dst > 0) + dma_map_sg(priv->dev, dst, sreq->nr_dst, + DMA_FROM_DEVICE); } memcpy(ctx->base.ctxr->data, ctx->key, ctx->key_len); @@ -883,12 +895,18 @@ rdesc_rollback: cdesc_rollback: for (i = 0; i < n_cdesc; i++) safexcel_ring_rollback_wptr(priv, &priv->ring[ring].cdr); - +unmap: if (src == dst) { - dma_unmap_sg(priv->dev, src, sreq->nr_src, DMA_BIDIRECTIONAL); + if (sreq->nr_src > 0) + dma_unmap_sg(priv->dev, src, sreq->nr_src, + DMA_BIDIRECTIONAL); } else { - dma_unmap_sg(priv->dev, src, sreq->nr_src, DMA_TO_DEVICE); - dma_unmap_sg(priv->dev, dst, sreq->nr_dst, DMA_FROM_DEVICE); + if (sreq->nr_src > 0) + dma_unmap_sg(priv->dev, src, sreq->nr_src, + DMA_TO_DEVICE); + if (sreq->nr_dst > 0) + dma_unmap_sg(priv->dev, dst, sreq->nr_dst, + DMA_FROM_DEVICE); } return ret; |