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SubjectRe: [PATCH v1 2/2] iio: core: Calculate alloc_size only once in iio_device_alloc()
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Le 04/03/2024 à 15:04, Andy Shevchenko a écrit :
> No need to rewrite the value, instead use 'else' branch.
> This will also help further refactoring the code later on.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
> ---
> drivers/iio/industrialio-core.c | 9 ++++-----
> 1 file changed, 4 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
> index 8684ba246969..c7ad88932015 100644
> --- a/drivers/iio/industrialio-core.c
> +++ b/drivers/iio/industrialio-core.c
> @@ -1643,11 +1643,10 @@ struct iio_dev *iio_device_alloc(struct device *parent, int sizeof_priv)
> struct iio_dev *indio_dev;
> size_t alloc_size;
>
> - alloc_size = sizeof(struct iio_dev_opaque);
> - if (sizeof_priv) {
> - alloc_size = ALIGN(alloc_size, IIO_DMA_MINALIGN);
> - alloc_size += sizeof_priv;
> - }
> + if (sizeof_priv)
> + alloc_size = ALIGN(sizeof(*iio_dev_opaque), IIO_DMA_MINALIGN) + sizeof_priv;

maybe size_add() to be super-safe?

CJ

> + else
> + alloc_size = sizeof(*iio_dev_opaque);
>
> iio_dev_opaque = kzalloc(alloc_size, GFP_KERNEL);
> if (!iio_dev_opaque)


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