diff options
Diffstat (limited to 'drivers/dma/virt-dma.c')
| -rw-r--r-- | drivers/dma/virt-dma.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/dma/virt-dma.c b/drivers/dma/virt-dma.c index bd85b052b481..a8054fc40cef 100644 --- a/drivers/dma/virt-dma.c +++ b/drivers/dma/virt-dma.c @@ -39,6 +39,19 @@ dma_cookie_t vchan_tx_submit(struct dma_async_tx_descriptor *tx) } EXPORT_SYMBOL_GPL(vchan_tx_submit); +struct virt_dma_desc *vchan_find_desc(struct virt_dma_chan *vc, + dma_cookie_t cookie) +{ + struct virt_dma_desc *vd; + + list_for_each_entry(vd, &vc->desc_issued, node) + if (vd->tx.cookie == cookie) + return vd; + + return NULL; +} +EXPORT_SYMBOL_GPL(vchan_find_desc); + /* * This tasklet handles the completion of a DMA descriptor by * calling its callback and freeing it. |