Hi Robin, Am Dienstag, den 12.06.2018, 08:58 +0000 schrieb Robin Gong: > Hi Lucas, > Is the below DEAD LOCK issue same as your side? If yes, then > I'm afraid that we have to make another patch for uart to split dma > functions in uart driver out of the code area which protected by > port.lock. The warning make sense since allocate sdma bd memory > dynamically in virt-dma instead of static allocated as before. I'll > make another uart patch into my next version patchset. Yes, I see the same lockdep splat on my system. Though I'm not sure if this is really the root cause of the issue I see. I'm getting timeouts for a serdev attached device and I don't think this system ever enters memory reclaim, so the issue reported by lockdep seems to be a mostly theoretical on this system. But lets see how far I get when you fixed this issue, maybe the real bug is hiding behind this one. Regards, Lucas -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
