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| author |   Vinod Koul <vinod.koul@intel.com> | 2016-10-03 09:19:03 +0530 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2016-10-03 09:19:03 +0530 |
| commit | 709c9464c335e1f8e22ee108def77d53330a95c7 (patch) | |
| tree | 505ba0ff73a90b537bd11a1aaa2aeba07100a49f /drivers/dma/pl330.c | |
| parent | Merge branch 'topic/omap' into for-linus (diff) | |
| parent | dmaengine: pl330: Acquire dmac's spinlock in pl330_tx_status (diff) | |
| download | linux-dev-709c9464c335e1f8e22ee108def77d53330a95c7.tar.xz linux-dev-709c9464c335e1f8e22ee108def77d53330a95c7.zip | |
Merge branch 'topic/pl330' into for-linus
Diffstat (limited to 'drivers/dma/pl330.c')
| -rw-r--r-- | drivers/dma/pl330.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c index 1ecd4674aa23..030fe05ed43b 100644 --- a/drivers/dma/pl330.c +++ b/drivers/dma/pl330.c @@ -2272,7 +2272,7 @@ pl330_tx_status(struct dma_chan *chan, dma_cookie_t cookie, { enum dma_status ret; unsigned long flags; - struct dma_pl330_desc *desc, *running = NULL; + struct dma_pl330_desc *desc, *running = NULL, *last_enq = NULL; struct dma_pl330_chan *pch = to_pchan(chan); unsigned int transferred, residual = 0; @@ -2285,10 +2285,13 @@ pl330_tx_status(struct dma_chan *chan, dma_cookie_t cookie, goto out; spin_lock_irqsave(&pch->lock, flags); + spin_lock(&pch->thread->dmac->lock); if (pch->thread->req_running != -1) running = pch->thread->req[pch->thread->req_running].desc; + last_enq = pch->thread->req[pch->thread->lstenq].desc; + /* Check in pending list */ list_for_each_entry(desc, &pch->work_list, node) { if (desc->status == DONE) @@ -2296,6 +2299,15 @@ pl330_tx_status(struct dma_chan *chan, dma_cookie_t cookie, else if (running && desc == running) transferred = pl330_get_current_xferred_count(pch, desc); + else if (desc->status == BUSY) + /* + * Busy but not running means either just enqueued, + * or finished and not yet marked done + */ + if (desc == last_enq) + transferred = 0; + else + transferred = desc->bytes_requested; else transferred = 0; residual += desc->bytes_requested - transferred; @@ -2316,6 +2328,7 @@ pl330_tx_status(struct dma_chan *chan, dma_cookie_t cookie, if (desc->last) residual = 0; } + spin_unlock(&pch->thread->dmac->lock); spin_unlock_irqrestore(&pch->lock, flags); out: |