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authorJoerg Roedel <jroedel@suse.de>2020-05-19 15:28:24 +0200
committerJoerg Roedel <jroedel@suse.de>2020-05-25 13:48:55 +0200
commit70b8170e55d3ca9503a53211967faee6b5f18b19 (patch)
tree045619867f44ce07462f4ec84a8f865fae2f978a /drivers/iommu/intel-iommu.c
parentiommu/mediatek-v1: Fix a build warning for a unused variable 'data' (diff)
downloadlinux-70b8170e55d3ca9503a53211967faee6b5f18b19.tar.xz
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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 'drivers/iommu/intel-iommu.c')
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