On Wed, May 13, 2020 at 11:16:14PM +0100, Guillaume Tucker wrote:
> which this time gave me:
>
> <4>[ 2.540558] PC is at iommu_probe_device+0x1c/0x15c
> <4>[ 2.545606] LR is at of_iommu_configure+0x15c/0x1c4
> <4>[ 2.550736] pc : [<c092e0e4>] lr : [<c0932c0c>] psr: a0000013
>
> which in turn brings us to:
>
> (gdb) l *0xc092e0e4
> 0xc092e0e4 is in iommu_probe_device (drivers/iommu/iommu.c:232).
> 227 int ret;
> 228
> 229 if (!dev_iommu_get(dev))
> 230 return -ENOMEM;
> 231
> 232 if (!try_module_get(ops->owner)) {
> 233 ret = -EINVAL;
> 234 goto err_out;
> 235 }
> 236
Okay, so ops is NULL. I queued a fix for that in the iommu-tree. If you
test the latest master branch the problem should be gone.
Thanks for the report,
Joerg
