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| author | Niklas Schnelle <schnelle@linux.ibm.com> | 2022-10-25 14:56:52 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2022-11-03 17:40:52 +0300 |
| commit | bf8d2dd2ed0825a58f31cc510245a1eb46f8a87e (patch) | |
| tree | 2fe6468df14c3c1b5a257b4705ba00b6e712b6be /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | 30a0b95b1335e12efef89dd78518ed3e4a71a763 (diff) | |
| download | linux-bf8d2dd2ed0825a58f31cc510245a1eb46f8a87e.tar.xz | |
iommu/s390: Fix duplicate domain attachments
Since commit fa7e9ecc5e1c ("iommu/s390: Tolerate repeat attach_dev
calls") we can end up with duplicates in the list of devices attached to
a domain. This is inefficient and confusing since only one domain can
actually be in control of the IOMMU translations for a device. Fix this
by detaching the device from the previous domain, if any, on attach.
Add a WARN_ON() in case we still have attached devices on freeing the
domain. While here remove the re-attach on failure dance as it was
determined to be unlikely to help and may confuse debug and recovery.
Fixes: fa7e9ecc5e1c ("iommu/s390: Tolerate repeat attach_dev calls")
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Link: https://lore.kernel.org/r/20221025115657.1666860-2-schnelle@linux.ibm.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions