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authorJonas Aaberg <jonas.aberg@stericsson.com>2010-06-20 21:26:01 +0000
committerDan Williams <dan.j.williams@intel.com>2010-06-22 18:01:55 -0700
commit1d392a7ba43300b0bde877de15121b261d7a6ce2 (patch)
tree2e45005cfbe64623117c764d791b9e98c75ebd52 /drivers/dma
parent2123a61e174074b849fce2277412836b1b897942 (diff)
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>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/ste_dma40.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index aa098a672605..8c46bb803dbb 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -508,6 +508,7 @@ static int d40_channel_execute_command(struct d40_chan *d40c,
void __iomem *active_reg;
int ret = 0;
unsigned long flags;
+ u32 wmask;
spin_lock_irqsave(&d40c->base->execmd_lock, flags);
@@ -525,7 +526,9 @@ static int d40_channel_execute_command(struct d40_chan *d40c,
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) {