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: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Joel Fernandes <joelf@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
index 30cbbde..cfc267e 100644
--- a/drivers/dma/edma.c
+++ b/drivers/dma/edma.c
@@ -852,11 +852,10 @@
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;