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>
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index df2e1a3..8aff865 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -640,19 +640,15 @@
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);
+ 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_SDLNK);
return val;
}