From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joerg Roedel Subject: Re: [PATCH v5 1/5] iommu: of: Fix check for returning EPROBE_DEFER Date: Tue, 30 May 2017 11:27:59 +0200 Message-ID: <20170530092759.GC2818@8bytes.org> References: <1495544493-14219-1-git-send-email-sricharan@codeaurora.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <1495544493-14219-1-git-send-email-sricharan-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Sricharan R Cc: catalin.marinas-5wv7dgnIgG8@public.gmane.org, will.deacon-5wv7dgnIgG8@public.gmane.org, okaya-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org, laurent.pinchart-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org, frowand.list-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, linux-arch-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, tn-nYOzD4b6Jr9Wk0Htik3J/w@public.gmane.org, magnus.damm-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, linux-acpi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, geert-Td1EMuHUCqxL1ZNQvxDV9g@public.gmane.org, linux-pci-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, lenb-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, arnd-r2nGTMty4D4@public.gmane.org, linux-arm-msm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, j.neuschaefer-hi6Y0CQ0nG0@public.gmane.org, robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, bhelgaas-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, rjw-LthD3rsA81gm4RdzfppkhA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, sudeep.holla-5wv7dgnIgG8@public.gmane.org List-Id: linux-arch.vger.kernel.org On Tue, May 23, 2017 at 06:31:29PM +0530, Sricharan R wrote: > Now with IOMMU probe deferral, we return -EPROBE_DEFER > for masters that are connected to an IOMMU which is not > probed yet, but going to get probed, so that we can attach > the correct dma_ops. So while trying to defer the probe of > the master, check if the of_iommu node that it is connected > to is marked in DT as 'status=disabled', then the IOMMU is never > is going to get probed. So simply return NULL and let the master > work without an IOMMU. > > Fixes: 7b07cbefb68d ("iommu: of: Handle IOMMU lookup failure with deferred probing or error") > Signed-off-by: Sricharan R > Reported-by: Geert Uytterhoeven > Reviewed-by: Laurent Pinchart > Tested-by: Will Deacon > Tested-by: Magnus Damn > Acked-by: Will Deacon Applied all to iommu/fixes, thanks. From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from 8bytes.org ([81.169.241.247]:58244 "EHLO theia.8bytes.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751078AbdE3J2D (ORCPT ); Tue, 30 May 2017 05:28:03 -0400 Date: Tue, 30 May 2017 11:27:59 +0200 From: Joerg Roedel Subject: Re: [PATCH v5 1/5] iommu: of: Fix check for returning EPROBE_DEFER Message-ID: <20170530092759.GC2818@8bytes.org> References: <1495544493-14219-1-git-send-email-sricharan@codeaurora.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1495544493-14219-1-git-send-email-sricharan@codeaurora.org> Sender: linux-arch-owner@vger.kernel.org List-ID: To: Sricharan R Cc: robin.murphy@arm.com, will.deacon@arm.com, lorenzo.pieralisi@arm.com, iommu@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, m.szyprowski@samsung.com, bhelgaas@google.com, linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org, tn@semihalf.com, hanjun.guo@linaro.org, okaya@codeaurora.org, robh+dt@kernel.org, frowand.list@gmail.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, sudeep.holla@arm.com, rjw@rjwysocki.net, lenb@kernel.org, catalin.marinas@arm.com, arnd@arndb.de, linux-arch@vger.kernel.org, laurent.pinchart@ideasonboard.com, j.neuschaefer@gmx.net, geert@linux-m68k.org, magnus.damm@gmail.com, nwatters@codeaurora.org Message-ID: <20170530092759.bqGEuaF4MJciBgldVDfT9ShpiL-j-Cp2GUPkNlj-Haw@z> On Tue, May 23, 2017 at 06:31:29PM +0530, Sricharan R wrote: > Now with IOMMU probe deferral, we return -EPROBE_DEFER > for masters that are connected to an IOMMU which is not > probed yet, but going to get probed, so that we can attach > the correct dma_ops. So while trying to defer the probe of > the master, check if the of_iommu node that it is connected > to is marked in DT as 'status=disabled', then the IOMMU is never > is going to get probed. So simply return NULL and let the master > work without an IOMMU. > > Fixes: 7b07cbefb68d ("iommu: of: Handle IOMMU lookup failure with deferred probing or error") > Signed-off-by: Sricharan R > Reported-by: Geert Uytterhoeven > Reviewed-by: Laurent Pinchart > Tested-by: Will Deacon > Tested-by: Magnus Damn > Acked-by: Will Deacon Applied all to iommu/fixes, thanks.