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>
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@ -473,6 +473,7 @@ int mite_buf_change(struct mite_ring *ring,
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struct comedi_subdevice *s)
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{
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struct comedi_async *async = s->async;
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struct mite_dma_desc *descs;
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unsigned int n_links;
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mite_free_dma_descs(ring);
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@ -482,15 +483,15 @@ int mite_buf_change(struct mite_ring *ring,
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n_links = async->prealloc_bufsz >> PAGE_SHIFT;
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ring->descs =
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dma_alloc_coherent(ring->hw_dev,
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n_links * sizeof(struct mite_dma_desc),
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&ring->dma_addr, GFP_KERNEL);
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if (!ring->descs) {
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descs = dma_alloc_coherent(ring->hw_dev,
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n_links * sizeof(*descs),
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&ring->dma_addr, GFP_KERNEL);
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if (!descs) {
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dev_err(s->device->class_dev,
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"mite: ring buffer allocation failed\n");
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return -ENOMEM;
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}
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ring->descs = descs;
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ring->n_links = n_links;
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return mite_init_ring_descriptors(ring, s, n_links << PAGE_SHIFT);
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