linux-kernel - [PATCH 1/3] dmaengine: fsldma: move spin_lock_bh to spin

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Date:   Fri, 17 Aug 2018 06:00:26 -0700
From:   Barry Song <21cnbao@...il.com>
To:     leoyang.li@....com, zw@...kernel.org, dan.j.williams@...el.com,
        vkoul@...nel.org, linuxppc-dev@...ts.ozlabs.org,
        dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Barry Song <21cnbao@...il.com>
Subject: [PATCH 1/3] dmaengine: fsldma: move spin_lock_bh to spin_lock in tasklet

as you are already in a tasklet, it is unnecessary to call spin_lock_bh.

Signed-off-by: Barry Song <21cnbao@...il.com>
---
 drivers/dma/fsldma.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index 1117b51..9d360a3 100644
--- a/drivers/dma/fsldma.c
+++ b/drivers/dma/fsldma.c
@@ -987,7 +987,7 @@ static void dma_do_tasklet(unsigned long data)
 
 	chan_dbg(chan, "tasklet entry\n");
 
-	spin_lock_bh(&chan->desc_lock);
+	spin_lock(&chan->desc_lock);
 
 	/* the hardware is now idle and ready for more */
 	chan->idle = true;
@@ -995,7 +995,7 @@ static void dma_do_tasklet(unsigned long data)
 	/* Run all cleanup for descriptors which have been completed */
 	fsldma_cleanup_descriptors(chan);
 
-	spin_unlock_bh(&chan->desc_lock);
+	spin_unlock(&chan->desc_lock);
 
 	chan_dbg(chan, "tasklet exit\n");
 }
-- 
2.7.4