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dmaengine: rcar-dmac: Fix spinlock issues in interrupt

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The rcar_dmac_desc_put() function is called in interrupt context and
must thus use spin_lock_irqsave() instead of spin_lock_irq().

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Laurent Pinchart
2015-01-27 15:52:13 +02:00
committed by Vinod Koul
parent b7a4fd53d2
commit f39150720e
1 changed files with 4 additions and 4 deletions
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8
drivers/dma/sh/rcar-dmac.c
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@@ -487,16 +487,16 @@ static int rcar_dmac_desc_alloc(struct rcar_dmac_chan *chan, gfp_t gfp)
*
* The descriptor must have been removed from the channel's lists before calling
* this function.
*
* Locking: Must be called in non-atomic context.
*/
static void rcar_dmac_desc_put(struct rcar_dmac_chan *chan,
struct rcar_dmac_desc *desc)
{
spin_lock_irq(&chan->lock);
unsigned long flags;
spin_lock_irqsave(&chan->lock, flags);
list_splice_tail_init(&desc->chunks, &chan->desc.chunks_free);
list_add_tail(&desc->node, &chan->desc.free);
spin_unlock_irq(&chan->lock);
spin_unlock_irqrestore(&chan->lock, flags);
}
static void rcar_dmac_desc_recycle_acked(struct rcar_dmac_chan *chan)