diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2013-01-09 08:17:13 (GMT) |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2013-01-09 14:30:59 (GMT) |
| commit | f5c6a7df35b04db906577e90fa5e133e56433bcf (patch) | |
| tree | dd444985a0c76cf282e4142331506731e8bf2555 /drivers | |
| parent | 21e93c1e7dae0e8b1914a522c331f0f7763fa89d (diff) | |
| download | linux-f5c6a7df35b04db906577e90fa5e133e56433bcf.tar.xz | |
dw_dmac: update tx_node_active in dwc_do_single_block
The "else" keyword in the dw_dma_tasklet is removed as well. All together
simplifies the logic of the code and understanding of what is happening there.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/dma/dw_dmac.c | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c index c74a7ec..d6b322a 100644 --- a/drivers/dma/dw_dmac.c +++ b/drivers/dma/dw_dmac.c @@ -247,6 +247,9 @@ static inline void dwc_do_single_block(struct dw_dma_chan *dwc, channel_writel(dwc, CTL_LO, ctllo); channel_writel(dwc, CTL_HI, desc->lli.ctlhi); channel_set_bit(dw, CH_EN, dwc->mask); + + /* Move pointer to next descriptor */ + dwc->tx_node_active = dwc->tx_node_active->next; } /* Called with dwc->lock held and bh disabled */ @@ -278,7 +281,7 @@ static void dwc_dostart(struct dw_dma_chan *dwc, struct dw_desc *first) dwc_initialize(dwc); dwc->tx_list = &first->tx_list; - dwc->tx_node_active = first->tx_list.next; + dwc->tx_node_active = &first->tx_list; dwc_do_single_block(dwc, first); @@ -604,18 +607,13 @@ static void dw_dma_tasklet(unsigned long data) dma_writel(dw, CLEAR.XFER, dwc->mask); - /* move pointer to next descriptor */ - dwc->tx_node_active = - dwc->tx_node_active->next; - dwc_do_single_block(dwc, desc); spin_unlock_irqrestore(&dwc->lock, flags); continue; - } else { - /* we are done here */ - clear_bit(DW_DMA_IS_SOFT_LLP, &dwc->flags); } + /* we are done here */ + clear_bit(DW_DMA_IS_SOFT_LLP, &dwc->flags); } spin_unlock_irqrestore(&dwc->lock, flags); |