diff options
| author | Gustavo A. R. Silva <gustavo@embeddedor.com> | 2018-08-24 04:15:40 +0300 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2018-12-20 10:10:26 +0300 |
| commit | 83ea00d6873fd7a6b7e94cf40f6dd0007593fb1e (patch) | |
| tree | 41887f7c1bccbd6b764fbaea6792f2fac840b955 /drivers/net/wireless | |
| parent | b71a9c35f214dbd9e9e33d36219bd0383f861677 (diff) | |
| download | linux-83ea00d6873fd7a6b7e94cf40f6dd0007593fb1e.tar.xz | |
iwlwifi: mvm: d3: 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>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers/net/wireless')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/mvm/d3.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/d3.c b/drivers/net/wireless/intel/iwlwifi/mvm/d3.c index 9b018d00f78f..01b5338201d6 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/d3.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/d3.c @@ -1811,8 +1811,7 @@ static void iwl_mvm_query_netdetect_reasons(struct iwl_mvm *mvm, n_matches = 0; } - net_detect = kzalloc(sizeof(*net_detect) + - (n_matches * sizeof(net_detect->matches[0])), + net_detect = kzalloc(struct_size(net_detect, matches, n_matches), GFP_KERNEL); if (!net_detect || !n_matches) goto out_report_nd; @@ -1827,8 +1826,7 @@ static void iwl_mvm_query_netdetect_reasons(struct iwl_mvm *mvm, for (j = 0; j < SCAN_OFFLOAD_MATCHING_CHANNELS_LEN; j++) n_channels += hweight8(fw_match->matching_channels[j]); - match = kzalloc(sizeof(*match) + - (n_channels * sizeof(*match->channels)), + match = kzalloc(struct_size(match, channels, n_channels), GFP_KERNEL); if (!match) goto out_report_nd; |