swiotlb: don't panic when the swiotlb buffer can't be allocated
For historical reasons the switlb code paniced when the metadata could not be allocated, but just printed a warning when the actual main swiotlb buffer could not be allocated. Restore this somewhat unexpected behavior as changing it caused a boot failure on the Microchip RISC-V PolarFire SoC Icicle kit. Fixes: 6424e31b ("swiotlb: remove swiotlb_init_with_tbl and swiotlb_init_late_with_tbl") Reported-by: Conor Dooley <Conor.Dooley@microchip.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org> Acked-by: Conor Dooley <conor.dooley@microchip.com> Tested-by: Conor Dooley <Conor.Dooley@microchip.com>
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