Simon Glass
5a8a8045a9
dm: core: Ensure DMA regions start up with the cache clean ...
There is a strange interaction with drivers which use DMA if the cache
starts off in a dirty state. Buffer space which the driver reads (but has
not previously written) can contain zero bytes from alloc_priv(). This can
cause corruption of the memory used by DMA for incoming data.
Fix this and add a comment to explain the problem.
This allows the dwc2 driver to work correctly with driver model, for
example.
Signed-off-by: Simon Glass <sjg@chromium.org>
2017-04-13 14:44:49 -06:00
2017-02-08 06:12:14 -07:00
2016-10-11 11:55:33 +08:00
2017-04-04 20:15:10 -06:00
2017-04-05 13:52:01 -04:00
2017-04-04 20:01:57 -06:00
2017-04-13 14:44:49 -06:00
2016-10-19 09:01:51 +02:00
2017-01-04 19:40:19 -05:00
2017-04-05 13:59:20 -04:00
2017-02-08 06:12:14 -07:00
2016-11-03 11:55:25 +01:00
2016-09-23 17:55:42 -04:00
2017-01-10 10:18:11 +01:00
2017-03-17 09:27:08 +01:00
2016-01-27 15:32:05 +01:00
2017-04-05 13:55:10 -04:00
2017-02-08 06:12:14 -07:00
2017-02-08 06:12:14 -07:00
2017-02-08 06:12:14 -07:00
2016-04-18 17:11:43 -04:00
2017-03-17 09:27:08 +01:00
2017-04-04 20:15:10 -06:00
2017-04-08 21:34:50 -04:00
2017-04-08 09:28:02 -04:00
2016-07-27 14:15:54 -06:00
2017-04-04 09:18:57 -04:00
2017-02-08 06:12:14 -07:00
2017-04-04 20:01:57 -06:00
2017-04-05 15:03:17 +05:30
2017-02-08 16:24:26 -05:00
2016-11-23 23:42:10 -08:00
2017-02-08 06:12:14 -07:00
2017-03-26 13:22:58 -06:00
2017-04-10 10:02:03 +08:00
2017-04-13 11:43:23 -06:00
2016-02-06 12:00:59 +01:00
2017-04-05 13:52:01 -04:00
2017-02-08 06:12:14 -07:00
2017-03-16 16:03:46 -06:00
2017-01-02 17:08:25 +01:00
2017-03-29 07:38:11 +02:00
2017-03-26 13:22:58 -06:00
2017-04-06 20:40:24 -04:00
2017-04-04 20:01:57 -06:00
2017-04-08 21:32:49 -04:00
2017-01-04 19:40:41 -05:00
2017-04-05 16:36:58 -04:00
5a8a8045a9