Messages in this thread |  | | | From | Florian Mickler <> | | Subject | [media] dib0700: get rid of on-stack dma buffers | | Date | Sun, 3 Apr 2011 19:23:41 +0200 |
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Hi,
since I got no reaction[1] on the vp702x driver, I proceed with the dib0700.
There are multiple drivers in drivers/media/dvb/dvb-usb/ which use usb_control_msg to perform dma to stack-allocated buffers. This is a bad idea because of cache-coherency issues and on some platforms the stack is mapped virtually and also lib/dma-debug.c warn's about it at runtime.
Patches to ec168, ce6230, au6610 and lmedm04 were already tested and reviewed and submitted for inclusion [2]. Patches to a800, vp7045, friio, dw2102, m920x and opera1 are still waiting for for review and testing [3].
This patch to dib0700 is a fix for a warning seen and reported by Zdenek Kabalec in Bug #15977 [4].
Florian Mickler (2): [media] dib0700: get rid of on-stack dma buffers [media] dib0700: remove unused variable
Regards, Flo
References: [1]: http://www.spinics.net/lists/linux-media/msg30448.html [2]: http://comments.gmane.org/gmane.linux.kernel/1115404 [3]: http://groups.google.com/group/fa.linux.kernel/browse_frm/thread/e169edc121b91181/f1498cd026a59fe2 [4]: https://bugzilla.kernel.org/show_bug.cgi?id=15977
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