From 95c78c9fd1aeab1a71114b8178be7415ae236d50 Mon Sep 17 00:00:00 2001 From: Jonas Aaberg Date: Tue, 6 Jul 2010 09:11:59 +0200 Subject: [PATCH 14/46] DMAENGINE: ste_dma40: don't pause/resume non-executing channels There is no point in pausing what isn't running. Signed-off-by: Jonas Aaberg Signed-off-by: Linus Walleij --- drivers/dma/ste_dma40.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c index c9f485e..05d0a99 100644 --- a/drivers/dma/ste_dma40.c +++ b/drivers/dma/ste_dma40.c @@ -768,6 +768,9 @@ static int d40_pause(struct dma_chan *chan) int res = 0; unsigned long flags; + if (!d40c->busy) + return 0; + spin_lock_irqsave(&d40c->lock, flags); res = d40_channel_execute_command(d40c, D40_DMA_SUSPEND_REQ); @@ -792,6 +795,9 @@ static int d40_resume(struct dma_chan *chan) int res = 0; unsigned long flags; + if (!d40c->busy) + return 0; + spin_lock_irqsave(&d40c->lock, flags); if (d40c->base->rev == 0) -- 1.6.3.3