Messages in this thread | | | Date | Mon, 13 Feb 2023 09:19:57 +0100 | Subject | Re: [PATCH] xen/grant-dma-iommu: Implement a dummy probe_device() callback | From | Juergen Gross <> |
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On 08.02.23 16:36, Oleksandr Tyshchenko wrote: > From: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com> > > Update stub IOMMU driver (which main purpose is to reuse generic > IOMMU device-tree bindings by Xen grant DMA-mapping layer on Arm) > according to the recent changes done in the following > commit 57365a04c921 ("iommu: Move bus setup to IOMMU device registration"). > > With probe_device() callback being called during IOMMU device registration, > the uninitialized callback just leads to the "kernel NULL pointer > dereference" issue during boot. Fix that by adding a dummy callback. > > Looks like the release_device() callback is not mandatory to be > implemented as IOMMU framework makes sure that callback is initialized > before dereferencing. > > Reported-by: Viresh Kumar <viresh.kumar@linaro.org> > Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
Pushed-to: xen/tip.git for-linus-6.3
Juergen
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