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-rw-r--r--drivers/xen/swiotlb-xen.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index 65ea21a97492..6e8c15a23201 100644
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -147,9 +147,15 @@ void __init xen_swiotlb_init(int verbose)
147{ 147{
148 unsigned long bytes; 148 unsigned long bytes;
149 int rc; 149 int rc;
150 150 unsigned long nr_tbl;
151 xen_io_tlb_nslabs = (64 * 1024 * 1024 >> IO_TLB_SHIFT); 151
152 xen_io_tlb_nslabs = ALIGN(xen_io_tlb_nslabs, IO_TLB_SEGSIZE); 152 nr_tbl = swioltb_nr_tbl();
153 if (nr_tbl)
154 xen_io_tlb_nslabs = nr_tbl;
155 else {
156 xen_io_tlb_nslabs = (64 * 1024 * 1024 >> IO_TLB_SHIFT);
157 xen_io_tlb_nslabs = ALIGN(xen_io_tlb_nslabs, IO_TLB_SEGSIZE);
158 }
153 159
154 bytes = xen_io_tlb_nslabs << IO_TLB_SHIFT; 160 bytes = xen_io_tlb_nslabs << IO_TLB_SHIFT;
155 161