On Tue, 2020-05-19 at 15:28 +0200, Joerg Roedel wrote: > From: Joerg Roedel <[email protected]> > > The .probe_finalize() call-back of some IOMMU drivers calls into > arm_iommu_attach_device(). This function will call back into the > IOMMU core code, where it tries to take group->mutex again, resulting > in a deadlock. > > As there is no reason why .probe_finalize() needs to be called under > that mutex, move it after the lock has been released to fix the > deadlock. > > Cc: Yong Wu <[email protected]> > Reported-by: Yong Wu <[email protected]> > Fixes: deac0b3bed26 ("iommu: Split off default domain allocation from group > assignment") > Signed-off-by: Joerg Roedel <[email protected]>
Tested-by: Yong Wu <[email protected]> Tested on MediaTek-v1 mt2701 evb board.
