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odd SEGFAULT -> transfer buffer not DMA capable
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WWWW
Tux's lil' helper
Tux's lil' helper


Joined: 30 Nov 2014
Posts: 143

PostPosted: Sun Nov 30, 2014 7:36 pm    Post subject: odd SEGFAULT -> transfer buffer not DMA capable Reply with quote

Hello,

I have a joystick that works perfectly with android and other distros but with gentoo I get an insane segmentation fault and the message above:

transfer buffer not DMA capable

The culprit seems usbcore

drivers/usb/core/hcd.c usb_hcd_map_for_urb_dma

Is this an option that I had overlooked in the kernel?

The only DMA related options that I recall in the kernel are these:

CONFIG_CMA
CONFIG_DMA_CMA

and both checked.

I need this fixed this badly, I want to have some fun too!
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roarinelk
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Guru


Joined: 04 Mar 2004
Posts: 506

PostPosted: Mon Dec 01, 2014 7:35 am    Post subject: Reply with quote

disable both CONFIG_CMA and CONFIG_DMA_CMA, these are really only useful for embedded devices.
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