From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joerg Roedel Subject: Re: [PATCH v2 00/33] iommu: Move iommu_group setup to IOMMU core code Date: Tue, 2 Jun 2020 16:23:12 +0200 Message-ID: <20200602142312.GJ14598__31048.2256625377$1591107818$gmane$org@8bytes.org> References: <20200414131542.25608-1-joro@8bytes.org> <20200529221623.qc6twmpzryh7nkvb@cantor> <20200601104240.7f5xhz7gooqhaq4n@cantor> <47711845-98ee-95b8-aa95-423a36ed9741@linux.intel.com> <20200602000236.j4m3jvluzdhjngdc@cantor> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <20200602000236.j4m3jvluzdhjngdc@cantor> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+glpam-linux-mediatek=m.gmane-mx.org-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org To: Lu Baolu , Will Deacon , Robin Murphy , Marek Szyprowski , Kukjin Kim , Krzysztof Kozlowski , David Woodhouse , Andy Gross , Bjorn Andersson , Matthias Brugger , Rob Clark , Heiko Stuebner , Gerald Schaefer , Thierry Reding , Jonathan Hunter , Jean-Philippe Brucker , linux-s390-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-samsung-soc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-msm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, virtualization-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, linux-mediatek@li List-Id: linux-tegra@vger.kernel.org Hi Jerry, On Mon, Jun 01, 2020 at 05:02:36PM -0700, Jerry Snitselaar wrote: > > Yeah, that will solve the panic. > If you still see the kdump faults, can you please try with the attached diff? I was not able to reproduce them in my setup. Regards, Joerg diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index b5ea203f6c68..5a6d509f72b6 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -1680,8 +1680,12 @@ static void probe_alloc_default_domain(struct bus_type *bus, static int iommu_group_do_dma_attach(struct device *dev, void *data) { struct iommu_domain *domain = data; + int ret = 0; - return __iommu_attach_device(domain, dev); + if (!iommu_is_attach_deferred(group->domain, dev)) + ret = __iommu_attach_device(group->domain, dev); + + return ret; } static int __iommu_group_dma_attach(struct iommu_group *group)