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Commit 6ba736a1 authored by Pierre Ossman's avatar Pierre Ossman
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sdhci: handle dma boundary interrupts 



When the device hits certain memory boundaries, it signals an
interrupt and expects to be serviced. We don't need the feature
but we need to make sure the device doesn't stall.

Signed-off-by: default avatarPierre Ossman <drzeus@drzeus.cx>
parent c0f3b6c7

drivers/mmc/host/sdhci.c

+9 −0
Original line number Diff line number Diff line
@@ -963,6 +963,15 @@ static void sdhci_data_irq(struct sdhci_host *host, u32 intmask) 
		if (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL))

			sdhci_transfer_pio(host);



		/*

		 * We currently don't do anything fancy with DMA

		 * boundaries, but as we can't disable the feature

		 * we need to at least restart the transfer.

		 */

		if (intmask & SDHCI_INT_DMA_END)

			writel(readl(host->ioaddr + SDHCI_DMA_ADDRESS),

				host->ioaddr + SDHCI_DMA_ADDRESS);



		if (intmask & SDHCI_INT_DATA_END)

			sdhci_finish_data(host);

	}