openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

Merge branch 'topic/pl330' into for-linus

This commit is contained in:
Vinod Koul 2016-10-03 09:19:03 +05:30
parent 765630daa8 a40235a227
commit 709c9464c3
1 changed files with 14 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/dma/pl330.c
View File

@ -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: