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| author | Alistair Popple <apopple@nvidia.com> | 2022-11-14 22:55:37 +1100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-11-22 18:50:42 -0800 |
| commit | 4a955bed882e734807024afd8f53213d4c61ff97 (patch) | |
| tree | 1fead60bdfe8c4113d1769bc5c5e6f454c450900 /mm/debug.c | |
| parent | cd08d80ecdac577bad2e8d6805c7a3859fdefb8d (diff) | |
| download | linux-4a955bed882e734807024afd8f53213d4c61ff97.tar.gz linux-4a955bed882e734807024afd8f53213d4c61ff97.tar.bz2 linux-4a955bed882e734807024afd8f53213d4c61ff97.zip | |
mm/memory: return vm_fault_t result from migrate_to_ram() callback
The migrate_to_ram() callback should always succeed, but in rare cases can
fail usually returning VM_FAULT_SIGBUS. Commit 16ce101db85d
("mm/memory.c: fix race when faulting a device private page") incorrectly
stopped passing the return code up the stack. Fix this by setting the ret
variable, restoring the previous behaviour on migrate_to_ram() failure.
Link: https://lkml.kernel.org/r/20221114115537.727371-1-apopple@nvidia.com
Fixes: 16ce101db85d ("mm/memory.c: fix race when faulting a device private page")
Signed-off-by: Alistair Popple <apopple@nvidia.com>
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Alex Sierra <alex.sierra@amd.com>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Lyude Paul <lyude@redhat.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/debug.c')
0 files changed, 0 insertions, 0 deletions