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| author | Gustavo A. R. Silva <gustavo@embeddedor.com> | 2019-06-06 17:57:13 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2019-06-13 09:31:41 +0300 |
| commit | 1793d1aba1941573ba9ebf75dfbb11a8c2b943b1 (patch) | |
| tree | f5fb556a4e5e654b39d79781c788494b069e4ca2 /drivers | |
| parent | 0b211338cf73eb7dd9a1c26721ce43076918373f (diff) | |
| download | linux-1793d1aba1941573ba9ebf75dfbb11a8c2b943b1.tar.xz | |
crypto: qat - use struct_size() helper
One of the more common cases of allocation size calculations is finding
the size of a structure that has a zero-sized array at the end, along
with memory for some number of elements for that array. For example:
struct qat_alg_buf_list {
...
struct qat_alg_buf bufers[];
} __packed __aligned(64);
Make use of the struct_size() helper instead of an open-coded version
in order to avoid any potential type mistakes.
So, replace the following form:
sizeof(struct qat_alg_buf_list) + ((1 + n) * sizeof(struct qat_alg_buf))
with:
struct_size(bufl, bufers, n + 1)
This code was detected with the help of Coccinelle.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/crypto/qat/qat_common/qat_algs.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/crypto/qat/qat_common/qat_algs.c b/drivers/crypto/qat/qat_common/qat_algs.c index 2842b2cdaa90..b50eb55f8f57 100644 --- a/drivers/crypto/qat/qat_common/qat_algs.c +++ b/drivers/crypto/qat/qat_common/qat_algs.c @@ -717,8 +717,7 @@ static int qat_alg_sgl_to_bufl(struct qat_crypto_instance *inst, dma_addr_t blp; dma_addr_t bloutp = 0; struct scatterlist *sg; - size_t sz_out, sz = sizeof(struct qat_alg_buf_list) + - ((1 + n) * sizeof(struct qat_alg_buf)); + size_t sz_out, sz = struct_size(bufl, bufers, n + 1); if (unlikely(!n)) return -EINVAL; @@ -755,8 +754,7 @@ static int qat_alg_sgl_to_bufl(struct qat_crypto_instance *inst, struct qat_alg_buf *bufers; n = sg_nents(sglout); - sz_out = sizeof(struct qat_alg_buf_list) + - ((1 + n) * sizeof(struct qat_alg_buf)); + sz_out = struct_size(buflout, bufers, n + 1); sg_nctr = 0; buflout = kzalloc_node(sz_out, GFP_ATOMIC, dev_to_node(&GET_DEV(inst->accel_dev))); |