Messages in this thread | | | From | Oliver Neukum <> | Subject | Re: USB mass storage and ARM cache coherency | Date | Tue, 2 Feb 2010 15:52:19 +0100 |
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Am Dienstag, 2. Februar 2010 15:42:49 schrieb Clemens Ladisch: > > Or... usb-audio? I should have verified that it is using bulk endpoints > > (and thus the patch applies to my case). > > usb-audio probably uses isochronous transfers, thus that would be > > an obvious reason why the patch didn't work for me. > > snd-usb-audio indeed uses isochronous transfers, but those buffers are > never mapped into user space. The intermediate vmalloc()ed buffer is, > however, and there was a bugfix for this recently. Do you have these > patches in your tree?
Now that I think about it, several video drivers do map it to user space.
Regards Oliver
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