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05 April 2024, 19:05:47 UTC
Revision 97729b653de52ba98e08732dd8855586e37a3a31 authored by Stefano Stabellini on 12 May 2021, 20:18:23 UTC, committed by Juergen Gross on 14 May 2021, 13:52:11 UTC 
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>
1 parent 687842e
History
Tip revision: 97729b653de52ba98e08732dd8855586e37a3a31 authored by Stefano Stabellini on 12 May 2021, 20:18:23 UTC
xen/swiotlb: check if the swiotlb has already been initialized
Tip revision: 97729b6
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