Problem: "transfer buffer not dma capable"

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On Dec 17th Piotr Chmura reported an oops when trying to watch tv with his siano device, which uses smsusb, in Kaffeine.

I was recently seeing a very similar oops with Linux 4.9.0-rc6+, but upon plugging in a Geniatech SU30000 device (vid,pid / 0x1f4d,0x3000)

which uses dw2102. Compiling the 4.9.0-rc6+ kernel with this config setting disabled for now, as suggested here

https://github.com/LibreELEC/LibreELEC.tv/pull/1076 got rid of the oops for me, and the Geniatech device no longer experiences the

"transfer buffer not dma capable" oops. http://pastebin.com/JWdHUDac

Hope that helps someone else as it helped me.



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