From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Subject: Re: dma_get_required_mask tidyups Date: Wed, 19 Sep 2018 17:01:48 +0200 Message-ID: <20180919150148.GA29588@lst.de> References: <20180910061332.28187-1-hch@lst.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20180910061332.28187-1-hch@lst.de> Sender: linux-kernel-owner@vger.kernel.org To: iommu@lists.linux-foundation.org Cc: Benjamin Herrenschmidt , Robin Murphy , Greg Kroah-Hartman , linux-kernel@vger.kernel.org List-Id: iommu@lists.linux-foundation.org Any comments? I have a a few things piled up that base on this, so some forward progress would be great. On Mon, Sep 10, 2018 at 08:13:29AM +0200, Christoph Hellwig wrote: > Hi all, > > the dma_get_required_mask dma API implementation has always been a little > odd, in that we by default don't wire it up struct dma_map_ops, but > instead hard code a default implementation. powerpc and ia64 override > this default and either call a method or otherwise duplicate the default. > > This series always enabled the method and just falls back to the previous > default implementation when it is not available, as well as fixing up > a few bits in the default implementations. This already allows removing > the ia64 override of the implementation, and will also allow to remove > the powerpc one together with a few additional cleanups in the powerpc > code, but those will be sent separately with other powerpc DMA API > patches. Last but not least the method will allow us to return a more > sensible value for typical iommu dma_ops eventually, but that is left > to another series as well. > _______________________________________________ > iommu mailing list > iommu@lists.linux-foundation.org > https://lists.linuxfoundation.org/mailman/listinfo/iommu ---end quoted text---