Please refer to previous revisions if you know what to do.
The patch proposed was merged into kernel in 5.8 release, but no longer working as of linux 5.11
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September 10, 2026 19:09
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[ARCHIVED] Fix for CSR Dongle 0a12:0001 ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)
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To Swyter: (old-style mailing ;) This patch was originally created by analyzing the transmission protocol used by the proprietary dongle drivers on Windows, and implementing similar behavior in the Linux kernel code. What I did use was comparing it afterwards with solutions from other places — bugzilla, other repositories. I didn't compare it to this gist.
As for the verbatim text — I took it from the kernel code in drivers/bluetooth/btusb.c, you can take a look there yourself.
Of course, after reading it, I now understand that those changes in the kernel came from this thread. Okay — I don't mind if someone submits my changes to the kernel as well. I just wanted a patch that works right here and now, because I couldn't find a single working version for this dongle.