On 08.02.23 16:36, Oleksandr Tyshchenko wrote:
From: Oleksandr Tyshchenko <[email protected]>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 <[email protected]> Signed-off-by: Oleksandr Tyshchenko <[email protected]>
Pushed-to: xen/tip.git for-linus-6.3 Juergen
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