diff options
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/amba-pl08x.c | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c index 41c62fd0680d..9ebceca17530 100644 --- a/drivers/dma/amba-pl08x.c +++ b/drivers/dma/amba-pl08x.c @@ -854,8 +854,10 @@ static int prep_phy_channel(struct pl08x_dma_chan *plchan, int ret; /* Check if we already have a channel */ - if (plchan->phychan) - return 0; + if (plchan->phychan) { + ch = plchan->phychan; + goto got_channel; + } ch = pl08x_get_phy_channel(pl08x, plchan); if (!ch) { @@ -880,21 +882,22 @@ static int prep_phy_channel(struct pl08x_dma_chan *plchan, return -EBUSY; } ch->signal = ret; - - /* Assign the flow control signal to this channel */ - if (txd->direction == DMA_MEM_TO_DEV) - txd->ccfg |= ch->signal << PL080_CONFIG_DST_SEL_SHIFT; - else if (txd->direction == DMA_DEV_TO_MEM) - txd->ccfg |= ch->signal << PL080_CONFIG_SRC_SEL_SHIFT; } + plchan->phychan = ch; dev_dbg(&pl08x->adev->dev, "allocated physical channel %d and signal %d for xfer on %s\n", ch->id, ch->signal, plchan->name); +got_channel: + /* Assign the flow control signal to this channel */ + if (txd->direction == DMA_MEM_TO_DEV) + txd->ccfg |= ch->signal << PL080_CONFIG_DST_SEL_SHIFT; + else if (txd->direction == DMA_DEV_TO_MEM) + txd->ccfg |= ch->signal << PL080_CONFIG_SRC_SEL_SHIFT; + plchan->phychan_hold++; - plchan->phychan = ch; return 0; } |