diff options
| author | Gustavo A. R. Silva <gustavo@embeddedor.com> | 2018-08-23 20:12:47 -0500 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2018-08-28 16:42:54 +0300 |
| commit | 06ae8dc00433797555481ee3391cab6acaf1a5db (patch) | |
| tree | 358655a8e2b76ed3fd6af33dbcdcb559f91da9b5 | |
| parent | a9911937e7d332761e8c4fcbc7ba0426bdc3956f (diff) | |
| download | linux-06ae8dc00433797555481ee3391cab6acaf1a5db.tar.bz2 | |
ath10k: use struct_size() in kzalloc()
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 foo {
int stuff;
void *entry[];
};
instance = kzalloc(sizeof(struct foo) + sizeof(void *) * count, GFP_KERNEL);
Instead of leaving these open-coded and prone to type mistakes, we can
now use the new struct_size() helper:
instance = kzalloc(struct_size(instance, entry, count), GFP_KERNEL);
This issue was detected with the help of Coccinelle.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
| -rw-r--r-- | drivers/net/wireless/ath/ath10k/ce.c | 24 |
1 files changed, 8 insertions, 16 deletions
diff --git a/drivers/net/wireless/ath/ath10k/ce.c b/drivers/net/wireless/ath/ath10k/ce.c index 18c709c484e7..d0381aaad01c 100644 --- a/drivers/net/wireless/ath/ath10k/ce.c +++ b/drivers/net/wireless/ath/ath10k/ce.c @@ -1416,10 +1416,8 @@ ath10k_ce_alloc_src_ring(struct ath10k *ar, unsigned int ce_id, nentries = roundup_pow_of_two(nentries); - src_ring = kzalloc(sizeof(*src_ring) + - (nentries * - sizeof(*src_ring->per_transfer_context)), - GFP_KERNEL); + src_ring = kzalloc(struct_size(src_ring, per_transfer_context, + nentries), GFP_KERNEL); if (src_ring == NULL) return ERR_PTR(-ENOMEM); @@ -1476,10 +1474,8 @@ ath10k_ce_alloc_src_ring_64(struct ath10k *ar, unsigned int ce_id, nentries = roundup_pow_of_two(nentries); - src_ring = kzalloc(sizeof(*src_ring) + - (nentries * - sizeof(*src_ring->per_transfer_context)), - GFP_KERNEL); + src_ring = kzalloc(struct_size(src_ring, per_transfer_context, + nentries), GFP_KERNEL); if (!src_ring) return ERR_PTR(-ENOMEM); @@ -1534,10 +1530,8 @@ ath10k_ce_alloc_dest_ring(struct ath10k *ar, unsigned int ce_id, nentries = roundup_pow_of_two(attr->dest_nentries); - dest_ring = kzalloc(sizeof(*dest_ring) + - (nentries * - sizeof(*dest_ring->per_transfer_context)), - GFP_KERNEL); + dest_ring = kzalloc(struct_size(dest_ring, per_transfer_context, + nentries), GFP_KERNEL); if (dest_ring == NULL) return ERR_PTR(-ENOMEM); @@ -1580,10 +1574,8 @@ ath10k_ce_alloc_dest_ring_64(struct ath10k *ar, unsigned int ce_id, nentries = roundup_pow_of_two(attr->dest_nentries); - dest_ring = kzalloc(sizeof(*dest_ring) + - (nentries * - sizeof(*dest_ring->per_transfer_context)), - GFP_KERNEL); + dest_ring = kzalloc(struct_size(dest_ring, per_transfer_context, + nentries), GFP_KERNEL); if (!dest_ring) return ERR_PTR(-ENOMEM); |