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staging: comedi: mite: use prefered form for passing a struct size 

Add a local variable to mite_buf_change() so that the prefered
form of passing a struct size, sizeof(*p), can be used.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten 2016-05-02 10:11:43 -07:00 committed by Greg Kroah-Hartman
parent 9ec148da5f
commit 0bdb1288fa
1 changed files with 6 additions and 5 deletions
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9
drivers/staging/comedi/drivers/mite.c
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@ -473,6 +473,7 @@ int mite_buf_change(struct mite_ring *ring,
struct comedi_subdevice *s)
{
struct comedi_async *async = s->async;
struct mite_dma_desc *descs;
unsigned int n_links;
mite_free_dma_descs(ring);
@ -482,15 +483,15 @@ int mite_buf_change(struct mite_ring *ring,
n_links = async->prealloc_bufsz >> PAGE_SHIFT;
ring->descs =
dma_alloc_coherent(ring->hw_dev,
n_links * sizeof(struct mite_dma_desc),
descs = dma_alloc_coherent(ring->hw_dev,
n_links * sizeof(*descs),
&ring->dma_addr, GFP_KERNEL);
if (!ring->descs) {
if (!descs) {
dev_err(s->device->class_dev,
"mite: ring buffer allocation failed\n");
return -ENOMEM;
}
ring->descs = descs;
ring->n_links = n_links;
return mite_init_ring_descriptors(ring, s, n_links << PAGE_SHIFT);