Commit 0037ae47 authored May 22, 2017 by Alexander Sverdlin Committed by Vinod Koul May 24, 2017

dmaengine: ep93xx: Always start from BASE0



The current buffer is being reset to zero on device_free_chan_resources()
but not on device_terminate_all(). It could happen that HW is restarted and
expects BASE0 to be used, but the driver is not synchronized and will start
from BASE1. One solution is to reset the buffer explicitly in
m2p_hw_setup().

Signed-off-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

parent 9a445bbb

drivers/dma/ep93xx_dma.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -323,6 +323,8 @@ static int m2p_hw_setup(struct ep93xx_dma_chan *edmac)
		\| M2P_CONTROL_ENABLE;
		m2p_set_control(edmac, control);

		edmac->buffer = 0;

		return 0;
		}

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