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dw_dmac: disable dma in optimal way in probe

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The dw_dma_off call needs to have the all_chan_mask calculated. So, done this
calculations before the call. Moreover, remove duplicate code that masks the
DMA interrupts.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Viresh Kumar <viresh.linux@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
This commit is contained in:
Andy Shevchenko 2012-06-19 13:34:06 +03:00 committed by Vinod Koul
parent 2e4c364e15
commit 11f932ec22
1 changed files with 4 additions and 8 deletions
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12
drivers/dma/dw_dmac.c
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@ -1431,6 +1431,9 @@ static int __init dw_probe(struct platform_device *pdev)
}
clk_prepare_enable(dw->clk);
/* Calculate all channel mask before DMA setup */
dw->all_chan_mask = (1 << pdata->nr_channels) - 1;
/* force dma off, just in case */
dw_dma_off(dw);
@ -1442,8 +1445,6 @@ static int __init dw_probe(struct platform_device *pdev)
tasklet_init(&dw->tasklet, dw_dma_tasklet, (unsigned long)dw);
dw->all_chan_mask = (1 << pdata->nr_channels) - 1;
INIT_LIST_HEAD(&dw->dma.channels);
for (i = 0; i < pdata->nr_channels; i++) {
struct dw_dma_chan *dwc = &dw->chan[i];
@ -1473,17 +1474,12 @@ static int __init dw_probe(struct platform_device *pdev)
channel_clear_bit(dw, CH_EN, dwc->mask);
}
/* Clear/disable all interrupts on all channels. */
/* Clear all interrupts on all channels. */
dma_writel(dw, CLEAR.XFER, dw->all_chan_mask);
dma_writel(dw, CLEAR.SRC_TRAN, dw->all_chan_mask);
dma_writel(dw, CLEAR.DST_TRAN, dw->all_chan_mask);
dma_writel(dw, CLEAR.ERROR, dw->all_chan_mask);
channel_clear_bit(dw, MASK.XFER, dw->all_chan_mask);
channel_clear_bit(dw, MASK.SRC_TRAN, dw->all_chan_mask);
channel_clear_bit(dw, MASK.DST_TRAN, dw->all_chan_mask);
channel_clear_bit(dw, MASK.ERROR, dw->all_chan_mask);
dma_cap_set(DMA_MEMCPY, dw->dma.cap_mask);
dma_cap_set(DMA_SLAVE, dw->dma.cap_mask);
if (pdata->is_private)