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authorGustavo A. R. Silva <gustavo@embeddedor.com>2019-02-21 11:57:14 -0600
committerMark Brown <broonie@kernel.org>2019-02-22 15:16:57 +0000
commitac227fb5bc950cf97b0d50ab7ee2c8aa7cd65441 (patch)
tree6d1c73bd77dc905db832bbcce8b6e254af626b61 /drivers/regulator/da9063-regulator.c
parenta661b1d9936e77a6c07f8ca10e3494932fa5e2c8 (diff)
regulator: da9063: Use struct_size() in devm_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; struct boo entry[]; }; size = sizeof(struct foo) + count * sizeof(struct boo); instance = alloc(size, GFP_KERNEL) Instead of leaving these open-coded and prone to type mistakes, we can now use the new struct_size() helper: instance = alloc(struct_size(instance, entry, count), GFP_KERNEL) Notice that, in this case, variable size is not necessary, hence it is removed. This code was detected with the help of Coccinelle. Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/regulator/da9063-regulator.c')
-rw-r--r--drivers/regulator/da9063-regulator.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/regulator/da9063-regulator.c b/drivers/regulator/da9063-regulator.c
index a83bbd3dbc37..2b0c7a85306a 100644
--- a/drivers/regulator/da9063-regulator.c
+++ b/drivers/regulator/da9063-regulator.c
@@ -739,7 +739,6 @@ static int da9063_regulator_probe(struct platform_device *pdev)
struct regulator_config config;
bool bcores_merged, bmem_bio_merged;
int id, irq, n, n_regulators, ret, val;
- size_t size;
regl_pdata = da9063_pdata ? da9063_pdata->regulators_pdata : NULL;
@@ -784,9 +783,8 @@ static int da9063_regulator_probe(struct platform_device *pdev)
n_regulators--; /* remove BMEM_BIO_MERGED */
/* Allocate memory required by usable regulators */
- size = sizeof(struct da9063_regulators) +
- n_regulators * sizeof(struct da9063_regulator);
- regulators = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
+ regulators = devm_kzalloc(&pdev->dev, struct_size(regulators,
+ regulator, n_regulators), GFP_KERNEL);
if (!regulators)
return -ENOMEM;