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| author | Frank Li <Frank.Li@nxp.com> | 2023-08-23 14:26:35 -0400 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2023-09-28 16:58:57 +0530 |
| commit | 3f4b82167a3b1f4ddb33d890f758a042ef4ceef1 (patch) | |
| tree | 6cda9d13183e79dd4d12539d895365c079d8b7ef /scripts/gdb/linux/vmalloc.py | |
| parent | 54a5aff6f98b69e73cba40470f103a72bd436b20 (diff) | |
dmaengine: fsl-edma: fix edma4 channel enable failure on second attempt
When attempting to start DMA for the second time using
fsl_edma3_enable_request(), channel never start.
CHn_MUX must have a unique value when selecting a peripheral slot in the
channel mux configuration. The only value that may overlap is source 0.
If there is an attempt to write a mux configuration value that is already
consumed by another channel, a mux configuration of 0 (SRC = 0) will be
written.
Check CHn_MUX before writing in fsl_edma3_enable_request().
Fixes: 72f5801a4e2b ("dmaengine: fsl-edma: integrate v3 support")
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20230823182635.2618118-1-Frank.Li@nxp.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'scripts/gdb/linux/vmalloc.py')
0 files changed, 0 insertions, 0 deletions