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| author |   Peter Ujfalusi <peter.ujfalusi@ti.com> | 2017-11-14 16:32:03 +0200 |
|---|---|---|
| committer |   Vinod Koul <vinod.koul@intel.com> | 2017-12-04 22:33:51 +0530 |
| commit | 6af149d2b1422e0e873d8558274713e6f63142c2 (patch) | |
| tree | 781a20e50da84484666dc5152bbead514d59f386 /drivers/dma/virt-dma.h | |
| parent | Linux 4.15-rc1 (diff) | |
| download | linux-dev-6af149d2b1422e0e873d8558274713e6f63142c2.tar.xz linux-dev-6af149d2b1422e0e873d8558274713e6f63142c2.zip | |
dmaengine: virt-dma: Add helper to free/reuse a descriptor
The vchan_vdesc_fini() can be used to free or reuse a given descriptor
after it has been marked as completed.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/virt-dma.h')
| -rw-r--r-- | drivers/dma/virt-dma.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/dma/virt-dma.h b/drivers/dma/virt-dma.h index 3f776a46a29c..2edb05505102 100644 --- a/drivers/dma/virt-dma.h +++ b/drivers/dma/virt-dma.h @@ -104,6 +104,20 @@ static inline void vchan_cookie_complete(struct virt_dma_desc *vd) } /** + * vchan_vdesc_fini - Free or reuse a descriptor + * @vd: virtual descriptor to free/reuse + */ +static inline void vchan_vdesc_fini(struct virt_dma_desc *vd) +{ + struct virt_dma_chan *vc = to_virt_chan(vd->tx.chan); + + if (dmaengine_desc_test_reuse(&vd->tx)) + list_add(&vd->node, &vc->desc_allocated); + else + vc->desc_free(vd); +} + +/** * vchan_cyclic_callback - report the completion of a period * @vd: virtual descriptor */ |