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fpga: dfl: Use struct_size() in kzalloc() 

Make use of the struct_size() helper instead of an open-coded version
in order to avoid any potential type mistakes. Also, remove unnecessary
function dfl_feature_platform_data_size().

This code was detected with the help of Coccinelle and, audited and
fixed manually.

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Moritz Fischer <mdf@kernel.org>
This commit is contained in:
Gustavo A. R. Silva 2020-06-17 17:10:39 -05:00 committed by Moritz Fischer
parent 23f872b6ec
commit e1d9ec3af3
2 changed files with 1 additions and 8 deletions
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3
drivers/fpga/dfl.c
View File

@ -487,8 +487,7 @@ static int build_info_commit_dev(struct build_feature_devs_info *binfo)
* it will be automatically freed by device's release() callback,
* platform_device_release().
*/
pdata = kzalloc(dfl_feature_platform_data_size(binfo->feature_num),
GFP_KERNEL);
pdata = kzalloc(struct_size(pdata, features, binfo->feature_num), GFP_KERNEL);
if (!pdata)
return -ENOMEM;

6
drivers/fpga/dfl.h
View File

@ -299,12 +299,6 @@ struct dfl_feature_ops {
#define DFL_FPGA_FEATURE_DEV_FME "dfl-fme"
#define DFL_FPGA_FEATURE_DEV_PORT "dfl-port"
static inline int dfl_feature_platform_data_size(const int num)
{
return sizeof(struct dfl_feature_platform_data) +
num * sizeof(struct dfl_feature);
}
void dfl_fpga_dev_feature_uinit(struct platform_device *pdev);
int dfl_fpga_dev_feature_init(struct platform_device *pdev,
struct dfl_feature_driver *feature_drvs);