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Blackfin SPI Driver: tweak magic spi dma sequence to get it working on BF54x
Without this change, SPI DMA is not reliably under stress tests. Obiviously it's a hardware issue which is not addressed by any document. Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -862,8 +862,9 @@ static void pump_transfers(unsigned long data)
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set_dma_start_addr(drv_data->dma_channel, dma_start_addr);
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set_dma_config(drv_data->dma_channel, dma_config);
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local_irq_save(flags);
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enable_dma(drv_data->dma_channel);
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SSYNC();
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write_CTRL(drv_data, cr);
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enable_dma(drv_data->dma_channel);
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dma_enable_irq(drv_data->dma_channel);
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local_irq_restore(flags);
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