[BUG] SoundWire BPT/BRA w/ CHAIN_DMA fails with DMA buffer-alloc failure #8751
Description
Describe the bug
When trying stress tests on the SoundWire BPT/BRA protocol with a CHAIN_DMA, I see a buffer allocation failure after exactly 60 iterations
To Reproduce
Need dedicated kernel branch thesofproject/linux#4679
Reproduction Rate
100%
Expected behavior
no buffer allocation issues.
Impact
showstopper for the feature, but not immediate P1
Environment
-
Branch name and commit hash of the 2 repositories: sof (firmware/topology) and linux (kernel driver).
- Kernel: 9d7340258d31 ASoC: rt722-sdca-sdw: fix locking sequence (PR SoundWire: start adding BPT/BRA support linux#4679)
- SOF: 40f6de5 sof_ri_info: fix imr size for cnl
-
Name of the topology file
n/a -
Name of the platform(s) on which the bug is observed.
LNL
Screenshots or console output
chain-dma-alloc-fail.txt
The alloc failure seems to happen exactly at the same iteration, so this looks like a memory leak of sorts.
root@jf-lnlm-rvp-sdw-1:~# bash loop.sh
0
1
2
...
57
58
59
60
write.sh: line 9: echo: write error: Invalid argument