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authorAlexander Sverdlin <alexander.sverdlin@gmail.com>2017-05-22 16:05:22 +0200
committerVinod Koul <vinod.koul@intel.com>2017-05-24 09:52:46 +0530
commit0037ae47812b1f431cc602100d1d51f37d77b61e (patch)
tree5a6d750d378933e13476acaf7555c4bb7ce3edf1 /drivers/dma
parent9a445bbb1607d9f14556a532453dd86d1b7e381e (diff)
downloadlinux-0037ae47812b1f431cc602100d1d51f37d77b61e.tar.bz2
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>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/ep93xx_dma.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/dma/ep93xx_dma.c b/drivers/dma/ep93xx_dma.c
index d37e8dda8079..deb009c3121f 100644
--- a/drivers/dma/ep93xx_dma.c
+++ b/drivers/dma/ep93xx_dma.c
@@ -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;
}