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iio: buffer: Save a few cycles in 'iio_scan_mask_set()'

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Use 'bitmap_alloc()' instead of 'bitmap_zalloc()' because the bitmap
is fully overridden by a 'bitmap_copy()' call just after its allocation.

While at it, fix the style of a NULL check.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/89d8a766eb971eda1ee362444a8711037bdb208c.1626261211.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Christophe JAILLET 2021-07-14 13:14:41 +02:00 committed by Jonathan Cameron
parent 62f9eb7079
commit 458516508d
1 changed files with 2 additions and 2 deletions
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4
drivers/iio/industrialio-buffer.c
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@ -354,8 +354,8 @@ static int iio_scan_mask_set(struct iio_dev *indio_dev,
const unsigned long *mask;
unsigned long *trialmask;
trialmask = bitmap_zalloc(indio_dev->masklength, GFP_KERNEL);
if (trialmask == NULL)
trialmask = bitmap_alloc(indio_dev->masklength, GFP_KERNEL);
if (!trialmask)
return -ENOMEM;
if (!indio_dev->masklength) {
WARN(1, "Trying to set scanmask prior to registering buffer\n");