diff options
Diffstat (limited to 'crypto')
| -rw-r--r-- | crypto/async_tx/async_tx.c | 12 | ||||
| -rw-r--r-- | crypto/blkcipher.c | 11 |
2 files changed, 17 insertions, 6 deletions
diff --git a/crypto/async_tx/async_tx.c b/crypto/async_tx/async_tx.c index 0350071..bc18cbb 100644 --- a/crypto/async_tx/async_tx.c +++ b/crypto/async_tx/async_tx.c @@ -80,6 +80,7 @@ dma_wait_for_async_tx(struct dma_async_tx_descriptor *tx) { enum dma_status status; struct dma_async_tx_descriptor *iter; + struct dma_async_tx_descriptor *parent; if (!tx) return DMA_SUCCESS; @@ -87,8 +88,15 @@ dma_wait_for_async_tx(struct dma_async_tx_descriptor *tx) /* poll through the dependency chain, return when tx is complete */ do { iter = tx; - while (iter->cookie == -EBUSY) - iter = iter->parent; + + /* find the root of the unsubmitted dependency chain */ + while (iter->cookie == -EBUSY) { + parent = iter->parent; + if (parent && parent->cookie == -EBUSY) + iter = iter->parent; + else + break; + } status = dma_sync_wait(iter->chan, iter->cookie); } while (status == DMA_IN_PROGRESS || (iter != tx)); diff --git a/crypto/blkcipher.c b/crypto/blkcipher.c index 7755834..d8f8ec3 100644 --- a/crypto/blkcipher.c +++ b/crypto/blkcipher.c @@ -59,11 +59,13 @@ static inline void blkcipher_unmap_dst(struct blkcipher_walk *walk) scatterwalk_unmap(walk->dst.virt.addr, 1); } +/* Get a spot of the specified length that does not straddle a page. + * The caller needs to ensure that there is enough space for this operation. + */ static inline u8 *blkcipher_get_spot(u8 *start, unsigned int len) { - if (offset_in_page(start + len) < len) - return (u8 *)((unsigned long)(start + len) & PAGE_MASK); - return start; + u8 *end_page = (u8 *)(((unsigned long)(start + len - 1)) & PAGE_MASK); + return start > end_page ? start : end_page; } static inline unsigned int blkcipher_done_slow(struct crypto_blkcipher *tfm, @@ -155,7 +157,8 @@ static inline int blkcipher_next_slow(struct blkcipher_desc *desc, if (walk->buffer) goto ok; - n = bsize * 2 + (alignmask & ~(crypto_tfm_ctx_alignment() - 1)); + n = bsize * 3 - (alignmask + 1) + + (alignmask & ~(crypto_tfm_ctx_alignment() - 1)); walk->buffer = kmalloc(n, GFP_ATOMIC); if (!walk->buffer) return blkcipher_walk_done(desc, walk, -ENOMEM); |
