diff options
| author | Rabin Vincent <rabin.vincent@stericsson.com> | 2012-05-17 13:47:38 +0530 |
|---|---|---|
| committer | Fabio Baltieri <fabio.baltieri@linaro.org> | 2013-01-14 10:50:37 +0100 |
| commit | ccc3d6976433aa67131117fccd2b5143d82a6f48 (patch) | |
| tree | 5ef904efcb61988c273f4987cd2bc86c772cdec9 /drivers/misc/carma/carma-fpga.c | |
| parent | 42365cf0fa19473dde5fe226b0e7e9ab8ea18af8 (diff) | |
dmaengine: ste_dma40: don't allow high priority dest event lines
Hardware bug: when a logical channel is triggerred by a high priority
destination event line, an extra packet transaction is generated in case
of important data write response latency on previous logical channel A
and if the source transfer of current logical channel B is already
completed and if no other channel with a higher priority than B is
waiting for execution.
Software workaround: do not set the high priority level for the
destination event lines that trigger logical channels.
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Reviewed-by: Shreshtha Kumar Sahu <shreshthakumar.sahu@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org>
Diffstat (limited to 'drivers/misc/carma/carma-fpga.c')
0 files changed, 0 insertions, 0 deletions