From: Luca Coelho <luca@coelho.fi>
To: kvalo@codeaurora.org
Cc: linux-wireless@vger.kernel.org,
"Gustavo A. R. Silva" <gustavo@embeddedor.com>,
Luca Coelho <luciano.coelho@intel.com>
Subject: [PATCH 04/20] iwlwifi: eeprom-parse: use struct_size() in kzalloc()
Date: Fri, 15 Feb 2019 13:49:08 +0200 [thread overview]
Message-ID: <20190215114924.2545-5-luca@coelho.fi> (raw)
In-Reply-To: <20190215114924.2545-1-luca@coelho.fi>
From: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
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 code 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>
---
drivers/net/wireless/intel/iwlwifi/iwl-eeprom-parse.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-eeprom-parse.c b/drivers/net/wireless/intel/iwlwifi/iwl-eeprom-parse.c
index 75940ac406b9..04338c3a6205 100644
--- a/drivers/net/wireless/intel/iwlwifi/iwl-eeprom-parse.c
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-eeprom-parse.c
@@ -850,8 +850,7 @@ iwl_parse_eeprom_data(struct device *dev, const struct iwl_cfg *cfg,
if (WARN_ON(!cfg || !cfg->eeprom_params))
return NULL;
- data = kzalloc(sizeof(*data) +
- sizeof(struct ieee80211_channel) * IWL_NUM_CHANNELS,
+ data = kzalloc(struct_size(data, channels, IWL_NUM_CHANNELS),
GFP_KERNEL);
if (!data)
return NULL;
--
2.20.1
next prev parent reply other threads:[~2019-02-15 11:49 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-15 11:49 [PATCH 00/20] iwlwifi: updates intended for v5.1 2019-02-15 Luca Coelho
2019-02-15 11:49 ` [PATCH 01/20] iwlwifi: pcie: allocate rb_stts's for all queues in one place Luca Coelho
2019-02-15 11:49 ` [PATCH 02/20] iwlwifi: mvm: Don't request HW restart if already requested Luca Coelho
2019-02-15 11:49 ` [PATCH 03/20] iwlwifi: fix false-positive maybe-uninitialized warning Luca Coelho
2019-02-15 11:49 ` Luca Coelho [this message]
2019-02-15 11:49 ` [PATCH 05/20] iwlwifi: nvm-parse: use struct_size() in kzalloc() Luca Coelho
2019-02-15 11:49 ` [PATCH 06/20] iwlwifi: mvm: fix error path in iwl_mvm_mac_setup_register() Luca Coelho
2019-02-15 11:49 ` [PATCH 07/20] iwlwifi: nvm-parse: advertise IEEE80211_VHT_EXT_NSS_BW_CAPABLE in VHT Luca Coelho
2019-02-15 11:49 ` [PATCH 08/20] iwlwifi: dvm: no need to check return value of debugfs_create functions Luca Coelho
2019-02-15 11:49 ` [PATCH 09/20] iwlwifi: fw: " Luca Coelho
2019-02-15 11:49 ` [PATCH 10/20] iwlwifi: iwl-drv: " Luca Coelho
2019-02-15 11:49 ` [PATCH 11/20] iwlwifi: mvm: reject new beacons when in inject mode Luca Coelho
2019-02-20 8:54 ` [PATCH v2 " Luca Coelho
2019-02-15 11:49 ` [PATCH 12/20] iwlwifi: mvm: add read debugfs for he_sniffer_params Luca Coelho
2019-02-15 11:49 ` [PATCH 13/20] iwlwifi: mvm: support non-transmitting AP Luca Coelho
2019-02-15 11:49 ` [PATCH 14/20] iwlwifi: mvm: Set TX_CMD_FLG_PROT_REQUIRE correctly Luca Coelho
2019-02-15 11:49 ` [PATCH 15/20] iwlwifi: mvm: remove IWL_MVM_INIT_STATUS_REG_HW_INIT_COMPLETE Luca Coelho
2019-02-15 11:49 ` [PATCH 16/20] iwlwifi: mvm: Allow retries for probe responses Luca Coelho
2019-02-15 11:49 ` [PATCH 17/20] iwlwifi: mvm: implement VHT extended NSS support in rs.c Luca Coelho
2019-02-15 11:49 ` [PATCH 18/20] iwlwifi: remove redundant condition from prior alive dump flow Luca Coelho
2019-02-15 11:49 ` [PATCH 19/20] iwlwifi: mvm: add some debug data to TX path Luca Coelho
2019-02-15 11:49 ` [PATCH 20/20] iwlwifi: dbg_ini: fix infinite time ignore consecutive dumps Luca Coelho
2019-02-20 12:35 ` [PATCH 00/20] iwlwifi: updates intended for v5.1 2019-02-15 Kalle Valo
2019-02-20 12:43 ` Luca Coelho
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