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aw_mmc: Read interrupt register value before writing to it

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Reported by: jmcneill
This commit is contained in:
Emmanuel Vadot 2018-05-12 13:12:26 +00:00
parent bc89214039
commit a37d59c145
1 changed files with 1 additions and 0 deletions
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1
sys/arm/allwinner/aw_mmc.c
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@ -450,6 +450,7 @@ aw_mmc_prepare_dma(struct aw_mmc_softc *sc)
AW_MMC_DMAC_IDMAC_IDMA_ON | AW_MMC_DMAC_IDMAC_FIX_BURST);
/* Enable RX or TX DMA interrupt */
val = AW_MMC_READ_4(sc, AW_MMC_IDIE);
if (cmd->data->flags & MMC_DATA_WRITE)
val |= AW_MMC_IDST_TX_INT;
else