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dmaengine/dw_dmac: don't call callback routine in case dmaengine_terminate_all() is called

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If dmaengine_terminate_all() is called for dma channel, then it doesn't make
much sense to call registered callback routine. While in case of success or
failure it must be called.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Viresh Kumar 2011-04-15 16:03:35 +05:30 committed by Vinod Koul
parent de7a2f9f7b
commit 5fedefb87b
1 changed files with 13 additions and 14 deletions
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27
drivers/dma/dw_dmac.c
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@ -195,18 +195,21 @@ static void dwc_dostart(struct dw_dma_chan *dwc, struct dw_desc *first)
/*----------------------------------------------------------------------*/
static void
dwc_descriptor_complete(struct dw_dma_chan *dwc, struct dw_desc *desc)
dwc_descriptor_complete(struct dw_dma_chan *dwc, struct dw_desc *desc,
bool callback_required)
{
dma_async_tx_callback callback;
void *param;
dma_async_tx_callback callback = NULL;
void *param = NULL;
struct dma_async_tx_descriptor *txd = &desc->txd;
struct dw_desc *child;
dev_vdbg(chan2dev(&dwc->chan), "descriptor %u complete\n", txd->cookie);
dwc->completed = txd->cookie;
callback = txd->callback;
param = txd->callback_param;
if (callback_required) {
callback = txd->callback;
param = txd->callback_param;
}
dwc_sync_desc_for_cpu(dwc, desc);
@ -238,11 +241,7 @@ dwc_descriptor_complete(struct dw_dma_chan *dwc, struct dw_desc *desc)
}
}
/*
* The API requires that no submissions are done from a
* callback, so we don't need to drop the lock here
*/
if (callback)
if (callback_required && callback)
callback(param);
}
@ -272,7 +271,7 @@ static void dwc_complete_all(struct dw_dma *dw, struct dw_dma_chan *dwc)
}
list_for_each_entry_safe(desc, _desc, &list, desc_node)
dwc_descriptor_complete(dwc, desc);
dwc_descriptor_complete(dwc, desc, true);
}
static void dwc_scan_descriptors(struct dw_dma *dw, struct dw_dma_chan *dwc)
@ -322,7 +321,7 @@ static void dwc_scan_descriptors(struct dw_dma *dw, struct dw_dma_chan *dwc)
* No descriptors so far seem to be in progress, i.e.
* this one must be done.
*/
dwc_descriptor_complete(dwc, desc);
dwc_descriptor_complete(dwc, desc, true);
}
dev_err(chan2dev(&dwc->chan),
@ -384,7 +383,7 @@ static void dwc_handle_error(struct dw_dma *dw, struct dw_dma_chan *dwc)
dwc_dump_lli(dwc, &child->lli);
/* Pretend the descriptor completed successfully */
dwc_descriptor_complete(dwc, bad_desc);
dwc_descriptor_complete(dwc, bad_desc, true);
}
/* --------------------- Cyclic DMA API extensions -------------------- */
@ -831,7 +830,7 @@ static int dwc_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
/* Flush all pending and queued descriptors */
list_for_each_entry_safe(desc, _desc, &list, desc_node)
dwc_descriptor_complete(dwc, desc);
dwc_descriptor_complete(dwc, desc, false);
return 0;
}