linux-kernel - [PATCH 2/3] dmaengine: xilinx_dma: Refactor axidma channel validation

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Date:   Fri, 27 Jul 2018 16:20:38 +0530
From:   Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>
To:     <dan.j.williams@...el.com>, <vkoul@...nel.org>,
        <michal.simek@...inx.com>, <appana.durga.rao@...inx.com>,
        <lars@...afoo.de>, <radhey.shyam.pandey@...inx.com>
CC:     <dmaengine@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH 2/3] dmaengine: xilinx_dma: Refactor axidma channel validation

In axidma start_transfer, prefer checking channel states before
other params i.e pending_list.

Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>
---
 drivers/dma/xilinx/xilinx_dma.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c
index 06d1632..a37871e 100644
--- a/drivers/dma/xilinx/xilinx_dma.c
+++ b/drivers/dma/xilinx/xilinx_dma.c
@@ -1271,10 +1271,10 @@ static void xilinx_dma_start_transfer(struct xilinx_dma_chan *chan)
 	if (chan->err)
 		return;
 
-	if (list_empty(&chan->pending_list))
+	if (!chan->idle)
 		return;
 
-	if (!chan->idle)
+	if (list_empty(&chan->pending_list))
 		return;
 
 	head_desc = list_first_entry(&chan->pending_list,
-- 
1.7.1