On Tue, 2010-02-02 at 15:10 +0000, Andreas Mohr wrote: > [added another __bzero coherency crash victim, see > http://lkml.org/lkml/2008/6/9/14 ] > > On Tue, Feb 02, 2010 at 03:52:19PM +0100, Oliver Neukum wrote: > > 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. > > OK, then the urb loop needs to also handle isochronous pipes, > and IMHO we should have a generic helper for this instead of open-coding > it, since it probably needs to be done in a couple affected HCDs > (and, most importantly, only on affected architectures - which the helper > could handle transparently). I'm planning to send a proposal to linux-arch for a flush_dcache_range() function. -- Catalin -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
