From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Return-Path: From: Sricharan R To: robin.murphy@arm.com, will.deacon@arm.com, joro@8bytes.org, 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 Subject: [PATCH v5 5/5] ACPI/IORT: Move the check to get iommu_ops from translated fwspec Date: Tue, 23 May 2017 18:31:33 +0530 Message-Id: <1495544493-14219-5-git-send-email-sricharan@codeaurora.org> In-Reply-To: <1495544493-14219-1-git-send-email-sricharan@codeaurora.org> References: <1495544493-14219-1-git-send-email-sricharan@codeaurora.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: sricharan@codeaurora.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+bjorn=helgaas.com@lists.infradead.org List-ID: From: Lorenzo Pieralisi With IOMMU probe deferral, iort_iommu_configure can be called multiple times for the same device. Hence we have a check to see if the device's fwspec is already translated and return the iommu_ops from that directly. But the check is wrongly placed in iort_iommu_xlate, which breaks devices with multiple sids. Move the check to iort_iommu_configure. Fixes: 5a1bb638d567 ("drivers: acpi: Handle IOMMU lookup failure with deferred probing or error") Tested-by: Nate Watterson Signed-off-by: Lorenzo Pieralisi --- [v5] new patch drivers/acpi/arm64/iort.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c index 16e101f..797b28d 100644 --- a/drivers/acpi/arm64/iort.c +++ b/drivers/acpi/arm64/iort.c @@ -666,14 +666,6 @@ static const struct iommu_ops *iort_iommu_xlate(struct device *dev, int ret = -ENODEV; struct fwnode_handle *iort_fwnode; - /* - * If we already translated the fwspec there - * is nothing left to do, return the iommu_ops. - */ - ops = iort_fwspec_iommu_ops(dev->iommu_fwspec); - if (ops) - return ops; - if (node) { iort_fwnode = iort_get_fwnode(node); if (!iort_fwnode) @@ -735,6 +727,14 @@ const struct iommu_ops *iort_iommu_configure(struct device *dev) u32 streamid = 0; int err; + /* + * If we already translated the fwspec there + * is nothing left to do, return the iommu_ops. + */ + ops = iort_fwspec_iommu_ops(dev->iommu_fwspec); + if (ops) + return ops; + if (dev_is_pci(dev)) { struct pci_bus *bus = to_pci_dev(dev)->bus; u32 rid; -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel