On Fri, Jul 31 2015, Feng Tang wrote: > Maybe I didn't make my problem clear, for our platform, we do need to > use cma as we have camera ISP which has no IOMMU, so we cannot set > "cma=0".
Then specify a CMA region for the camera in platform initialisation code or device trees or whatever else is the rave nowadays. I’m assuming that you have a piece of code (or configuration of some sort) that assigns a CMA region to the device (otherwise ‘dev->cma_area’ would be NULL and your patch would just always get you NULL CMA area). Simply create a CMA area there and assign it to the device. -- Best regards, _ _ .o. | Liege of Serenely Enlightened Majesty of o' \,=./ `o ..o | Computer Science, Michał “mina86” Nazarewicz (o o) ooo +--<[email protected]>--<xmpp:[email protected]>--ooO--(_)--Ooo-- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
