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| author |   Stefano Stabellini <stefano.stabellini@xilinx.com> | 2021-05-12 13:18:23 -0700 |
|---|---|---|
| committer |   Juergen Gross <jgross@suse.com> | 2021-05-14 15:52:11 +0200 |
| commit | 97729b653de52ba98e08732dd8855586e37a3a31 (patch) | |
| tree | 61ac0585a5c052bf60b4626b2f4bff11c1f0a4da /include | |
| parent | arm64: do not set SWIOTLB_NO_FORCE when swiotlb is required (diff) | |
| download | linux-dev-97729b653de52ba98e08732dd8855586e37a3a31.tar.xz linux-dev-97729b653de52ba98e08732dd8855586e37a3a31.zip | |
xen/swiotlb: check if the swiotlb has already been initialized
xen_swiotlb_init calls swiotlb_late_init_with_tbl, which fails with
-ENOMEM if the swiotlb has already been initialized.
Add an explicit check io_tlb_default_mem != NULL at the beginning of
xen_swiotlb_init. If the swiotlb is already initialized print a warning
and return -EEXIST.
On x86, the error propagates.
On ARM, we don't actually need a special swiotlb buffer (yet), any
buffer would do. So ignore the error and continue.
CC: boris.ostrovsky@oracle.com
CC: jgross@suse.com
Signed-off-by: Stefano Stabellini <stefano.stabellini@xilinx.com>
Reviewed-by: Boris Ostrovsky <boris.ostrvsky@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20210512201823.1963-3-sstabellini@kernel.org
Signed-off-by: Juergen Gross <jgross@suse.com>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions