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authorViresh Kumar <viresh.kumar@st.com>2011-03-03 15:47:20 +0530
committerVinod Koul <vinod.koul@intel.com>2011-03-07 01:12:27 +0530
commite518076ef8cb56adb558ff56ad5bfa0cd9f3abd9 (patch)
treece195fa32ee663a23a346ac042b70b01385ab58d /drivers/dma
parent418e74070662e1ae7d9bb5202f773d35c9a7f05e (diff)
downloadlinux-e518076ef8cb56adb558ff56ad5bfa0cd9f3abd9.tar.bz2
dw_dmac: Mark all tx_descriptors with DMA_CRTL_ACK after xfer finish
dwc_desc_get checks all descriptors for DMA_CTRL_ACK before allocating them for transfers. And descriptors are not marked with DMA_CRTL_ACK after transfer finishes. Thus descriptor once used is not usable again. This patch marks descriptors with DMA_CRTL_ACK after dma xfer finishes Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/dw_dmac.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c
index 711ebe954f5b..6ab440e532bf 100644
--- a/drivers/dma/dw_dmac.c
+++ b/drivers/dma/dw_dmac.c
@@ -198,6 +198,7 @@ dwc_descriptor_complete(struct dw_dma_chan *dwc, struct dw_desc *desc)
dma_async_tx_callback callback;
void *param;
struct dma_async_tx_descriptor *txd = &desc->txd;
+ struct dw_desc *child;
dev_vdbg(chan2dev(&dwc->chan), "descriptor %u complete\n", txd->cookie);
@@ -206,6 +207,12 @@ dwc_descriptor_complete(struct dw_dma_chan *dwc, struct dw_desc *desc)
param = txd->callback_param;
dwc_sync_desc_for_cpu(dwc, desc);
+
+ /* async_tx_ack */
+ list_for_each_entry(child, &desc->tx_list, desc_node)
+ async_tx_ack(&child->txd);
+ async_tx_ack(&desc->txd);
+
list_splice_init(&desc->tx_list, &dwc->free_list);
list_move(&desc->desc_node, &dwc->free_list);