dmaengine: at_hdmac: drop useless LIST_HEAD

Drop LIST_HEAD where the variable it declares is never used.

tmp_list has been declared since the introduction of the driver
and has never been used.  The two declarations of list were
introduced with the containing functions but were also not used.

The semantic patch that fixes this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
identifier x;
@@
- LIST_HEAD(x);
  ... when != x
// </smpl>

Fixes: dc78baa2b90b ("dmaengine: at_hdmac: new driver for the Atmel AHB DMA Controller")
Fixes: 4facfe7f09f2b ("dmaengine: hdmac: Split device_control")
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c
index 01d936c..a0a9cd7 100644 (file)
--- a/drivers/dma/at_hdmac.c
+++ b/drivers/dma/at_hdmac.c
@@ -134,7 +134,6 @@ static struct at_desc *atc_desc_get(struct at_dma_chan *atchan)
        struct at_desc *ret = NULL;
        unsigned long flags;
        unsigned int i = 0;
-       LIST_HEAD(tmp_list);
 
        spin_lock_irqsave(&atchan->lock, flags);
        list_for_each_entry_safe(desc, _desc, &atchan->free_list, desc_node) {
@@ -1387,8 +1386,6 @@ static int atc_pause(struct dma_chan *chan)
        int                     chan_id = atchan->chan_common.chan_id;
        unsigned long           flags;
 
-       LIST_HEAD(list);
-
        dev_vdbg(chan2dev(chan), "%s\n", __func__);
 
        spin_lock_irqsave(&atchan->lock, flags);
@@ -1408,8 +1405,6 @@ static int atc_resume(struct dma_chan *chan)
        int                     chan_id = atchan->chan_common.chan_id;
        unsigned long           flags;
 
-       LIST_HEAD(list);
-
        dev_vdbg(chan2dev(chan), "%s\n", __func__);
 
        if (!atc_chan_is_paused(atchan))