diff options
Diffstat (limited to 'arch/arm64/crypto/ghash-ce-glue.c')
| -rw-r--r-- | arch/arm64/crypto/ghash-ce-glue.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/arch/arm64/crypto/ghash-ce-glue.c b/arch/arm64/crypto/ghash-ce-glue.c index 42a0e84e276c..3c2c446dc96c 100644 --- a/arch/arm64/crypto/ghash-ce-glue.c +++ b/arch/arm64/crypto/ghash-ce-glue.c @@ -113,6 +113,9 @@ static void ghash_do_update(int blocks, u64 dg[], const char *src, } } +/* avoid hogging the CPU for too long */ +#define MAX_BLOCKS (SZ_64K / GHASH_BLOCK_SIZE) + static int ghash_update(struct shash_desc *desc, const u8 *src, unsigned int len) { @@ -136,11 +139,16 @@ static int ghash_update(struct shash_desc *desc, const u8 *src, blocks = len / GHASH_BLOCK_SIZE; len %= GHASH_BLOCK_SIZE; - ghash_do_update(blocks, ctx->digest, src, key, - partial ? ctx->buf : NULL); + do { + int chunk = min(blocks, MAX_BLOCKS); + + ghash_do_update(chunk, ctx->digest, src, key, + partial ? ctx->buf : NULL); - src += blocks * GHASH_BLOCK_SIZE; - partial = 0; + blocks -= chunk; + src += chunk * GHASH_BLOCK_SIZE; + partial = 0; + } while (unlikely(blocks > 0)); } if (len) memcpy(ctx->buf + partial, src, len); |