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authorJonas Aaberg <jonas.aberg@stericsson.com>2010-08-09 12:07:44 +0000
committerDan Williams <dan.j.williams@intel.com>2010-09-22 14:53:44 -0700
commitbe8cb7dfd92420b12dfd6831c2d638f4f46bdfdf (patch)
tree2a9fa34d9d37543653f86d523bcbd1b89c0a559a
parent0747c7bae5c93377f4ea81b55d6851eaddc677fe (diff)
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DMAENGINE: ste_dma40: Fix failed to restart logical channel bug
A transfer that runs in the different direction on the same channel will now be resumed when the other is suspend/stopped. 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>
-rw-r--r--drivers/dma/ste_dma40.c20
1 files changed, 8 insertions, 12 deletions
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index df2e1a30ee7..8aff8659414 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -640,19 +640,15 @@ static void d40_config_set_event(struct d40_chan *d40c, bool do_enable)
static u32 d40_chan_has_events(struct d40_chan *d40c)
{
- u32 val = 0;
+ u32 val;
- /* If SSLNK or SDLNK is zero all events are disabled */
- if ((d40c->dma_cfg.dir == STEDMA40_PERIPH_TO_MEM) ||
- (d40c->dma_cfg.dir == STEDMA40_PERIPH_TO_PERIPH))
- val = readl(d40c->base->virtbase + D40_DREG_PCBASE +
- d40c->phy_chan->num * D40_DREG_PCDELTA +
- D40_CHAN_REG_SSLNK);
-
- if (d40c->dma_cfg.dir != STEDMA40_PERIPH_TO_MEM)
- val = readl(d40c->base->virtbase + D40_DREG_PCBASE +
- d40c->phy_chan->num * D40_DREG_PCDELTA +
- D40_CHAN_REG_SDLNK);
+ val = readl(d40c->base->virtbase + D40_DREG_PCBASE +
+ d40c->phy_chan->num * D40_DREG_PCDELTA +
+ D40_CHAN_REG_SSLNK);
+
+ val |= readl(d40c->base->virtbase + D40_DREG_PCBASE +
+ d40c->phy_chan->num * D40_DREG_PCDELTA +
+ D40_CHAN_REG_SDLNK);
return val;
}