diff options
| author | Kai Ye | 2021-04-09 17:04:00 +0800 |
|---|---|---|
| committer | Herbert Xu | 2021-04-16 21:16:33 +1000 |
| commit | 51028c6efa90ba4ab2311b0977287aac8c154f5b (patch) | |
| tree | 3d34b5f2c7cbcab4fad8fa0dc0b222462fe740d1 /drivers/crypto | |
| parent | 07a4356bafa932eb64159866059ce17847520ecb (diff) | |
crypto: hisilicon/sgl - add a comment for block size initialization
This seems "32" and "31" is obfuscating, It might be better to add a comment,
which explain it.
Signed-off-by: Kai Ye <yekai13@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
| -rw-r--r-- | drivers/crypto/hisilicon/sgl.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/crypto/hisilicon/sgl.c b/drivers/crypto/hisilicon/sgl.c index 3bff6394acaf..cf1629c367b3 100644 --- a/drivers/crypto/hisilicon/sgl.c +++ b/drivers/crypto/hisilicon/sgl.c @@ -66,6 +66,11 @@ struct hisi_acc_sgl_pool *hisi_acc_create_sgl_pool(struct device *dev, sgl_size = sizeof(struct acc_hw_sge) * sge_nr + sizeof(struct hisi_acc_hw_sgl); + + /* + * the pool may allocate a block of memory of size PAGE_SIZE * 2^(MAX_ORDER - 1), + * block size may exceed 2^31 on ia64, so the max of block size is 2^31 + */ block_size = 1 << (PAGE_SHIFT + MAX_ORDER <= 32 ? PAGE_SHIFT + MAX_ORDER - 1 : 31); sgl_num_per_block = block_size / sgl_size; |