raspi/linux
1
0
Fork 1
mirror of https://github.com/raspberrypi/linux.git synced 2025-12-06 10:00:17 +00:00
Code Issues Projects Releases Wiki Activity

dmaengine: ep93xx: Always start from BASE0

Browse Source 
commit 0037ae4781 upstream.

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>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexander Sverdlin
2017-05-22 16:05:22 +02:00
committed by Greg Kroah-Hartman
parent 9812dc2abf
commit 81a38a595d
1 changed files with 2 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/dma/ep93xx_dma.c
View File

@@ -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;
}