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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Sep 08, 2022 at 09:08:38AM -0300, Jason Gunthorpe wrote: > On Thu, Sep 08, 2022 at 09:30:57AM +0000, Tian, Kevin wrote: > > There are also cases where common kAPIs are called in the attach > > path which may return -EINVAL and random errno, e.g.: > > > > omap_iommu_attach_dev() > > omap_iommu_attach() > > iommu_enable() > > pm_runtime_get_sync() > > __pm_runtime_resume() > > rpm_resume() > > if (dev->power.runtime_error) { > > retval = -EINVAL; > Yes, this is was also on my mind with choosing an unpopular return > code, it has a higher chance of not coming out of some other kernel > API I wonder if it would be safe to just treat a pm_runtime_get_sync() failure as -ENODEV, since a PM resume() mostly occurs to the IOMMU that an IOMMU client/master device is behind, while an iommu_domain rarely intervenes. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel