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rapidio/tsi721_dma: advance queue processing from transfer submit call

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Add advancing transfer queue immediately from transfer submit call.  DMA
performance improvement: This will start transfer without waiting for
'issue_pending' command if there is no DMA transfer in progress.

Link: http://lkml.kernel.org/r/1469125134-16523-8-git-send-email-alexandre.bounine@idt.com
Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Andre van Herk <andre.van.herk@prodrive-technologies.com>
Cc: Barry Wood <barry.wood@idt.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alexandre Bounine 2016-08-02 14:06:46 -07:00 committed by Linus Torvalds
parent e519685de3
commit f5485eb0b6
1 changed files with 1 additions and 0 deletions
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drivers/rapidio/devices/tsi721_dma.c
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@ -726,6 +726,7 @@ static dma_cookie_t tsi721_tx_submit(struct dma_async_tx_descriptor *txd)
cookie = dma_cookie_assign(txd);
desc->status = DMA_IN_PROGRESS;
list_add_tail(&desc->desc_node, &bdma_chan->queue);
tsi721_advance_work(bdma_chan, NULL);
spin_unlock_bh(&bdma_chan->lock);
return cookie;