summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorPeter Ujfalusi <peter.ujfalusi@ti.com>2017-11-14 17:32:03 +0300
committerVinod Koul <vinod.koul@intel.com>2017-12-04 20:03:51 +0300
commit6af149d2b1422e0e873d8558274713e6f63142c2 (patch)
tree781a20e50da84484666dc5152bbead514d59f386
parent4fbd8d194f06c8a3fd2af1ce560ddb31f7ec8323 (diff)
downloadlinux-6af149d2b1422e0e873d8558274713e6f63142c2.tar.xz
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>
-rw-r--r--drivers/dma/virt-dma.c5
-rw-r--r--drivers/dma/virt-dma.h14
2 files changed, 15 insertions, 4 deletions
diff --git a/drivers/dma/virt-dma.c b/drivers/dma/virt-dma.c
index 545e97279083..88ad8ed2a8d6 100644
--- a/drivers/dma/virt-dma.c
+++ b/drivers/dma/virt-dma.c
@@ -107,10 +107,7 @@ static void vchan_complete(unsigned long arg)
dmaengine_desc_get_callback(&vd->tx, &cb);
list_del(&vd->node);
- if (dmaengine_desc_test_reuse(&vd->tx))
- list_add(&vd->node, &vc->desc_allocated);
- else
- vc->desc_free(vd);
+ vchan_vdesc_fini(vd);
dmaengine_desc_callback_invoke(&cb, NULL);
}
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
*/