On Tue, Nov 17, 2009 at 12:48:14AM +0800, Wu Zhangjin wrote: > Seems this is MIPS specific, but it's not that easy to move this patch > into the arch/mips part, So, any better solution? > > Thanks & Regards, > Wu Zhangjin > > ------------------------ > > The user application mmap audio dma regions must be dma-coherent. This > patch fix it. > > Without this patch, artsd will fail on boot, and mplayer will exit with > "Segmentation fault". (this happens on YeeLoong netbook, fuloong2f > mini pc with snd_cs5535 audio card) > > This is originally from the to-mips branch of > http://dev.lemote.com/code/linux_loongson, and contributed by Yanhua > from Lemote Inc. > > Reported-by: qiaochong <qiaochong@xxxxxxxxx> > Signed-off-by: Wu Zhangjin <wuzj@xxxxxxxxxx> This issue is an old ghost still around, see: http://www.linux-mips.org/cgi-bin/mesg.cgi?a=linux-mips&i=20060124.132832.37533152.nemoto%40toshiba-tops.co.jp which is a superset of your proposed patch and which itself is refering to an even older posting from 2003: http://www.linux-mips.org/cgi-bin/mesg.cgi?a=linux-mips&i=20030523215935.71373.qmail%40web11901.mail.yahoo.com The #ifdef'ed solution doesn't cut it for sure. Let's see what better we can find ... Ralf
