x86/amd-iommu: Fix NULL pointer dereference in __detach_device()

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In the __detach_device function the reference count for a
device-domain binding may become zero. This results in the
device being removed from the domain and dev_data->domain
will be NULL. This is bad because this pointer is
dereferenced when trying to unlock the domain->lock. This
patch fixes the issue by keeping the domain in a seperate
variable.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

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Joerg Roedel 2010-01-22 16:45:31 +01:00

parent d91afd15b0

commit 2ca762790c

1 changed files with 5 additions and 2 deletions

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arch/x86/kernel/amd_iommu.c

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