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Commit aa50f259 authored by Seungwon Jeon's avatar Seungwon Jeon Committed by Chris Ball
Browse files

mmc: dw_mmc: fix the transfer termination in IDMAC mode 



In IDMAC mode EVENT_XFER_COMPLETE is set when RI/TI of last descriptor
is done. So if errors are happened in the middle of data transfers,
'dw_mci_stop_dma' during error handing can be called and eventually
prevents this flag to be set.  This results in permanent wait for
EVENT_XFER_COMPLETE in 'dw_mci_tasklet_func'.  Therefore, if dma
running is stopped forcibly, EVENT_XFER_COMPLETE should be set.

Reported-by: default avatarBing Zhao <bzhao@marvell.com>
Signed-off-by: default avatarDoug Anderson <dianders@chromium.org>
Signed-off-by: default avatarSeungwon Jeon <tgih.jun@samsung.com>
Tested-by: default avatarAlim Akhtar <alim.akhtar@samsung.com>
Acked-by: default avatarJaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: default avatarChris Ball <cjb@laptop.org>
parent 5ce9d961

drivers/mmc/host/dw_mmc.c

+3 −3
Original line number Diff line number Diff line
@@ -345,11 +345,11 @@ static void dw_mci_stop_dma(struct dw_mci *host) 
	if (host->using_dma) {

		host->dma_ops->stop(host);

		host->dma_ops->cleanup(host);

	} else {

	}



	/* Data transfer was stopped by the interrupt handler */

	set_bit(EVENT_XFER_COMPLETE, &host->pending_events);

}

}



static int dw_mci_get_dma_dir(struct mmc_data *data)

{