Now, dma_ops is assumed that use the IDMAC. But if dma_ops is assigned the pdata->dma_ops, We didn't ensure that callback function is defined.
If anything of callback didn't define, then should be run the PIO mode. Signed-off-by: Jaehoon Chung <[email protected]> Signed-off-by: Kyungmin Park <[email protected]> --- drivers/mmc/host/dw_mmc.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index f3b0fcd..bab9ead 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -1881,7 +1881,8 @@ static void dw_mci_init_dma(struct dw_mci *host) if (!host->dma_ops) goto no_dma; - if (host->dma_ops->init) { + if (host->dma_ops->init && host->dma_ops->start && + host->dma_ops->stop && host->dma_ops->cleanup) { if (host->dma_ops->init(host)) { dev_err(&host->dev, "%s: Unable to initialize " "DMA Controller.\n", __func__); -- 1.7.4.1 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
