2019-01-29 03:22:29

by Yue Haibing

Subject: [PATCH v2 0/2] cleanup for iwlwifi

v2: Use struct_size in regd allocation

YueHaibing (2):
iwlwifi: Use kmemdup instead of duplicating its function
iwlwifi: Use struct_size() in kzalloc

drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c | 19 ++++---------------
1 file changed, 4 insertions(+), 15 deletions(-)

--
2.7.4

2019-01-29 03:23:28

by Yue Haibing

Subject: [PATCH v2 1/2] iwlwifi: Use kmemdup instead of duplicating its function

Use kmemdup rather than duplicating its implementation

Signed-off-by: YueHaibing <[email protected]>
---
drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c | 8 ++------
1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c b/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c
index d9afedc..569cc50 100644
--- a/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c
@@ -1196,13 +1196,9 @@ iwl_parse_nvm_mcc_info(struct device *dev, const struct iwl_cfg *cfg,
regd_to_copy = sizeof(struct ieee80211_regdomain) +
valid_rules * sizeof(struct ieee80211_reg_rule);

- copy_rd = kzalloc(regd_to_copy, GFP_KERNEL);
- if (!copy_rd) {
+ copy_rd = kmemdup(regd, regd_to_copy, GFP_KERNEL);
+ if (!copy_rd)
copy_rd = ERR_PTR(-ENOMEM);
- goto out;
- }
-
- memcpy(copy_rd, regd, regd_to_copy);

out:
kfree(regdb_ptrs);
--
2.7.4

2019-01-29 03:24:24

by Yue Haibing

Subject: [PATCH v2 2/2] iwlwifi: Use struct_size() in kzalloc

Use struct_size() in kzalloc instead of the 'regd_to_copy'

Signed-off-by: YueHaibing <[email protected]>
---
drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c | 13 +++----------
1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c b/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c
index 569cc50..2b87c7c 100644
--- a/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c
@@ -1093,7 +1093,6 @@ iwl_parse_nvm_mcc_info(struct device *dev, const struct iwl_cfg *cfg,
const u8 *nvm_chan = cfg->nvm_type == IWL_NVM_EXT ?
iwl_ext_nvm_channels : iwl_nvm_channels;
struct ieee80211_regdomain *regd, *copy_rd;
- int size_of_regd, regd_to_copy;
struct ieee80211_reg_rule *rule;
struct regdb_ptrs *regdb_ptrs;
enum nl80211_band band;
@@ -1113,11 +1112,7 @@ iwl_parse_nvm_mcc_info(struct device *dev, const struct iwl_cfg *cfg,
num_of_ch);

/* build a regdomain rule for every valid channel */
- size_of_regd =
- sizeof(struct ieee80211_regdomain) +
- num_of_ch * sizeof(struct ieee80211_reg_rule);
-
- regd = kzalloc(size_of_regd, GFP_KERNEL);
+ regd = kzalloc(struct_size(regd, reg_rules, num_of_ch), GFP_KERNEL);
if (!regd)
return ERR_PTR(-ENOMEM);

@@ -1193,10 +1188,8 @@ iwl_parse_nvm_mcc_info(struct device *dev, const struct iwl_cfg *cfg,
* Narrow down regdom for unused regulatory rules to prevent hole
* between reg rules to wmm rules.
*/
- regd_to_copy = sizeof(struct ieee80211_regdomain) +
- valid_rules * sizeof(struct ieee80211_reg_rule);
-
- copy_rd = kmemdup(regd, regd_to_copy, GFP_KERNEL);
+ copy_rd = kmemdup(regd, struct_size(regd, reg_rules, valid_rules),
+ GFP_KERNEL);
if (!copy_rd)
copy_rd = ERR_PTR(-ENOMEM);

--
2.7.4

2019-02-14 11:29:30

by Luciano Coelho

Subject: Re: [PATCH v2 1/2] iwlwifi: Use kmemdup instead of duplicating its function

On Tue, 2019-01-29 at 11:21 +0800, YueHaibing wrote:
> Use kmemdup rather than duplicating its implementation
>
> Signed-off-by: YueHaibing <[email protected]>
> ---
> drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c | 8 ++------
> 1 file changed, 2 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c
> b/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c
> index d9afedc..569cc50 100644
> --- a/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c
> +++ b/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c
> @@ -1196,13 +1196,9 @@ iwl_parse_nvm_mcc_info(struct device *dev,
> const struct iwl_cfg *cfg,
> regd_to_copy = sizeof(struct ieee80211_regdomain) +
> valid_rules * sizeof(struct ieee80211_reg_rule);
>
> - copy_rd = kzalloc(regd_to_copy, GFP_KERNEL);
> - if (!copy_rd) {
> + copy_rd = kmemdup(regd, regd_to_copy, GFP_KERNEL);
> + if (!copy_rd)
> copy_rd = ERR_PTR(-ENOMEM);
> - goto out;
> - }
> -
> - memcpy(copy_rd, regd, regd_to_copy);
>
> out:
> kfree(regdb_ptrs);

This was already applied. Dropping.

--
Luca.

2019-02-14 11:30:23

by Luciano Coelho

Subject: Re: [PATCH v2 2/2] iwlwifi: Use struct_size() in kzalloc

On Tue, 2019-01-29 at 11:21 +0800, YueHaibing wrote:
> Use struct_size() in kzalloc instead of the 'regd_to_copy'
>
> Signed-off-by: YueHaibing <[email protected]>
> ---

Applied to our internal tree and it will reach the mainline following
our normal upstreaming process.

Thanks!

--
Luca.