linux-4.4.1/dma_buf_detach()

参照元†

• linux-4.4/DMA_buffer

説明†

• パス: linux-4.4.1/drivers/dma-buf/dma-buf.c

• FIXME: これは何？
  • 説明

引数†

• struct dma_buf *dmabuf
  • linux-4.4.1/dma_buf
• struct dma_buf_attachment *attach
  • linux-4.4.1/dma_buf_attachment

返り値†

• なし

参考†

実装†

/**
 * dma_buf_detach - Remove the given attachment from dmabuf's attachments list;
 * optionally calls detach() of dma_buf_ops for device-specific detach
 * @dmabuf:     [in]    buffer to detach from.
 * @attach:     [in]    attachment to be detached; is free'd after this call.
 *
 */
void dma_buf_detach(struct dma_buf *dmabuf, struct dma_buf_attachment *attach)
{
        if (WARN_ON(!dmabuf || !attach))
                return;

• • linux-4.4.1/WARN_ON()

        mutex_lock(&dmabuf->lock);
        list_del(&attach->node);
        if (dmabuf->ops->detach)
                dmabuf->ops->detach(dmabuf, attach);

• • linux-4.4.1/mutex_lock()
  • linux-4.4.1/list_del()
• dmabuf->ops は const struct dma_buf_ops * 型
  • linux-4.4.1/dma_buf_ops

        mutex_unlock(&dmabuf->lock);
        kfree(attach);

• • linux-4.4.1/mutex_unlock()
  • linux-4.4.1/kfree()

}
EXPORT_SYMBOL_GPL(dma_buf_detach);

• • linux-4.4.1/EXPORT_SYMBOL_GPL()

コメント†

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• katsuhiro

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