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authorAlexandru Ardelean <alexandru.ardelean@analog.com>2019-06-06 13:45:47 +0300
committerVinod Koul <vkoul@kernel.org>2019-06-14 11:22:43 +0530
commit09d5b702b0f97dd0768dade7106b6bf7622b1355 (patch)
tree3945b92ef9ad56aaa9570437f7577281a20229b6 /drivers/dma
parenta08a9645a3d6f9e11a2dba2b46f0d5ac5d80c4e0 (diff)
downloadlinux-09d5b702b0f97dd0768dade7106b6bf7622b1355.tar.bz2
dmaengine: virt-dma: store result on dma descriptor
This allows each virtual channel to store information about each transfer that completed, i.e. which transfer succeeded (or which failed) and if there was any residue data on each (completed) transfer. Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/virt-dma.c4
-rw-r--r--drivers/dma/virt-dma.h4
2 files changed, 6 insertions, 2 deletions
diff --git a/drivers/dma/virt-dma.c b/drivers/dma/virt-dma.c
index 88ad8ed2a8d6..bf560a20c8a8 100644
--- a/drivers/dma/virt-dma.c
+++ b/drivers/dma/virt-dma.c
@@ -101,7 +101,7 @@ static void vchan_complete(unsigned long arg)
}
spin_unlock_irq(&vc->lock);
- dmaengine_desc_callback_invoke(&cb, NULL);
+ dmaengine_desc_callback_invoke(&cb, &vd->tx_result);
list_for_each_entry_safe(vd, _vd, &head, node) {
dmaengine_desc_get_callback(&vd->tx, &cb);
@@ -109,7 +109,7 @@ static void vchan_complete(unsigned long arg)
list_del(&vd->node);
vchan_vdesc_fini(vd);
- dmaengine_desc_callback_invoke(&cb, NULL);
+ dmaengine_desc_callback_invoke(&cb, &vd->tx_result);
}
}
diff --git a/drivers/dma/virt-dma.h b/drivers/dma/virt-dma.h
index b09b75ab0751..eb767c583b7e 100644
--- a/drivers/dma/virt-dma.h
+++ b/drivers/dma/virt-dma.h
@@ -17,6 +17,7 @@
struct virt_dma_desc {
struct dma_async_tx_descriptor tx;
+ struct dmaengine_result tx_result;
/* protected by vc.lock */
struct list_head node;
};
@@ -65,6 +66,9 @@ static inline struct dma_async_tx_descriptor *vchan_tx_prep(struct virt_dma_chan
vd->tx.tx_submit = vchan_tx_submit;
vd->tx.desc_free = vchan_tx_desc_free;
+ vd->tx_result.result = DMA_TRANS_NOERROR;
+ vd->tx_result.residue = 0;
+
spin_lock_irqsave(&vc->lock, flags);
list_add_tail(&vd->node, &vc->desc_allocated);
spin_unlock_irqrestore(&vc->lock, flags);