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xen/swiotlb: For early initialization, return zero on success.

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If everything is setup properly we would return -ENOMEM since
rc by default is set to that value. Lets not do that and return
a proper return code.

Note: The reason the early code needs this special treatment
is that it SWIOTLB library call does not return anything (and
had it failed it would call panic()) - but our function does.

Acked-by: Stefano Stabellini <[email protected]>
Signed-off-by: Konrad Rzeszutek Wilk <[email protected]>
This commit is contained in:
Konrad Rzeszutek Wilk 2012-09-17 10:20:09 -04:00
commit c468bdee28
1 changed files with 3 additions and 2 deletions
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5
drivers/xen/swiotlb-xen.c
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@ -230,9 +230,10 @@ retry:
goto error;
}
start_dma_addr = xen_virt_to_bus(xen_io_tlb_start);
if (early)
if (early) {
swiotlb_init_with_tbl(xen_io_tlb_start, xen_io_tlb_nslabs, verbose);
else
rc = 0;
} else
rc = swiotlb_late_init_with_tbl(xen_io_tlb_start, xen_io_tlb_nslabs);
return rc;
error: