dmaengine: ioatdma: set the completion address register after channel reset
It seems that starting with Skylake Xeon, channel reset clears the completion address register. Make sure the completion address register is set again after reset. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
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ce397d215c
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4cb0e60112
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@ -688,6 +688,12 @@ static void ioat_restart_channel(struct ioatdma_chan *ioat_chan)
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{
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u64 phys_complete;
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/* set the completion address register again */
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writel(lower_32_bits(ioat_chan->completion_dma),
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ioat_chan->reg_base + IOAT_CHANCMP_OFFSET_LOW);
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writel(upper_32_bits(ioat_chan->completion_dma),
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ioat_chan->reg_base + IOAT_CHANCMP_OFFSET_HIGH);
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ioat_quiesce(ioat_chan, 0);
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if (ioat_cleanup_preamble(ioat_chan, &phys_complete))
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__cleanup(ioat_chan, phys_complete);
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