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Commit de135939 authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Vinod Koul
Browse files

dmaengine: edma: Check the current decriptor first in tx_status() 



It's likely that the caller investigates the status of a currently
active descriptor. Make that simple check first and only rumage in the
vchan list if that fails.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarJoel Fernandes <joelf@ti.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent b6205c39

drivers/dma/edma.c

+3 −4
Original line number Diff line number Diff line
@@ -852,11 +852,10 @@ static enum dma_status edma_tx_status(struct dma_chan *chan, 
		return ret;



	spin_lock_irqsave(&echan->vchan.lock, flags);

	vdesc = vchan_find_desc(&echan->vchan, cookie);

	if (vdesc)

		txstate->residue = to_edma_desc(&vdesc->tx)->residue;

	else if (echan->edesc && echan->edesc->vdesc.tx.cookie == cookie)

	if (echan->edesc && echan->edesc->vdesc.tx.cookie == cookie)

		txstate->residue = echan->edesc->residue;

	else if ((vdesc = vchan_find_desc(&echan->vchan, cookie)))

		txstate->residue = to_edma_desc(&vdesc->tx)->residue;

	spin_unlock_irqrestore(&echan->vchan.lock, flags);



	return ret;