ide: call udma_filter() before resorting to the UltraDMA mask

[linux-2.6-omap-h63xx.git] / crypto / blkcipher.c

diff --git a/crypto/blkcipher.c b/crypto/blkcipher.c
index 7755834b8846e450d53cac256032295ed7b88830..d8f8ec320213a4fc4656ad9340b30ddc904328a0 100644 (file)
--- 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);