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| author | Simon Xue <xxm@rock-chips.com> | 2025-06-23 05:00:18 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-07-10 17:08:53 +0300 |
| commit | 5af35e96a41e4b788b088377ff17820bdf74f4ce (patch) | |
| tree | 304bce237d34d95fd148eac0e04cca4c90a608bb /scripts/gdb/linux/utils.py | |
| parent | f27cf15783bd60063c6c97434cbd67ebd91d8db5 (diff) | |
| download | linux-5af35e96a41e4b788b088377ff17820bdf74f4ce.tar.xz | |
iommu/rockchip: prevent iommus dead loop when two masters share one IOMMU
commit 62e062a29ad5133f67c20b333ba0a952a99161ae upstream.
When two masters share an IOMMU, calling ops->of_xlate during
the second master's driver init may overwrite iommu->domain set
by the first. This causes the check if (iommu->domain == domain)
in rk_iommu_attach_device() to fail, resulting in the same
iommu->node being added twice to &rk_domain->iommus, which can
lead to an infinite loop in subsequent &rk_domain->iommus operations.
Cc: <stable@vger.kernel.org>
Fixes: 25c2325575cc ("iommu/rockchip: Add missing set_platform_dma_ops callback")
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/20250623020018.584802-1-xxm@rock-chips.com
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'scripts/gdb/linux/utils.py')
0 files changed, 0 insertions, 0 deletions