From: Pierre Ossman Date: Sun, 13 May 2007 20:39:23 +0000 (+0200) Subject: sdhci: handle dma boundary interrupts X-Git-Tag: v2.6.22-rc2~109^2~2 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6ba736a10e4ae63b38ccfee9f22b3263a6e5d050;p=linux-2.6 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: Pierre Ossman --- diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index ff5bf73cdd..a359efdd77 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -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); }