https://bugzilla.kernel.org/show_bug.cgi?id=215740 --- Comment #15 from Alan Stern (stern@xxxxxxxxxxxxxxxxxxx) --- Created attachment 305425 --> https://bugzilla.kernel.org/attachment.cgi?id=305425&action=edit Diagnostics for overlapped DMA mapping I just tried booting a kernel with CONFIG_DMA_API_DEBUG enabled. When I plugged in a hub and then plugged some devices into that hub, nothing went wrong. So since I can't do any useful testing here, maybe one of you can test the attached patch. It won't fix anything but it should help confirm what's happening and provide a starting point for further debugging. -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
