DMAENGINE: ste_dma40: no premature stop
Correct bug that could cause paused channels to stop.
Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index aa098a6..8c46bb8 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -508,6 +508,7 @@
void __iomem *active_reg;
int ret = 0;
unsigned long flags;
+ u32 wmask;
spin_lock_irqsave(&d40c->base->execmd_lock, flags);
@@ -525,7 +526,9 @@
goto done;
}
- writel(command << D40_CHAN_POS(d40c->phy_chan->num), active_reg);
+ wmask = 0xffffffff & ~(D40_CHAN_POS_MASK(d40c->phy_chan->num));
+ writel(wmask | (command << D40_CHAN_POS(d40c->phy_chan->num)),
+ active_reg);
if (command == D40_DMA_SUSPEND_REQ) {