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| author | Joerg Roedel <jroedel@suse.de> | 2020-05-19 15:28:24 +0200 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2020-05-25 13:48:55 +0200 |
| commit | 70b8170e55d3ca9503a53211967faee6b5f18b19 (patch) | |
| tree | 045619867f44ce07462f4ec84a8f865fae2f978a /lib/mpi/mpi-bit.c | |
| parent | 2bc61fbcc192f0b2e10e51e38f4f485ba5b293ca (diff) | |
iommu: Don't call .probe_finalize() under group->mutex
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.
Fixes: deac0b3bed26 ("iommu: Split off default domain allocation from group assignment")
Reported-by: Yong Wu <yong.wu@mediatek.com>
Tested-by: Yong Wu <yong.wu@mediatek.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Cc: Yong Wu <yong.wu@mediatek.com>
Link: https://lore.kernel.org/r/20200519132824.15163-1-joro@8bytes.org
Diffstat (limited to 'lib/mpi/mpi-bit.c')
0 files changed, 0 insertions, 0 deletions