From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Subject: Re: [PATCH v1] net/mlx4_core: VF probe fail when HW support 64-bit coherent DMA Date: Sun, 8 Jan 2017 06:30:32 -0800 Message-ID: <20170108143032.GA22478@infradead.org> References: <1483866889-10700-1-git-send-email-shamir.rabinovitch@oracle.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1483866889-10700-1-git-send-email-shamir.rabinovitch-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Shamir Rabinovitch Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, yishaih-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org List-Id: linux-rdma@vger.kernel.org On Sun, Jan 08, 2017 at 04:14:49AM -0500, Shamir Rabinovitch wrote: > CX3 firmware is unable to work with 64-bit coherent DMA. If IOMMU > support 64-bit coherent DMA mlx4_core driver will try to use it > and VF probe will fail due to firmware error. > > Force all mlx4_core coherent DMA to 32-bit only! If this is only an issue with VFs it should be limited to VF PCI IDs. If not the changelog should be updated a bit. -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html