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swiotlb-xen: limit init retries

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Due to the use of max(1024, ...) there's no point retrying (and issuing
bogus log messages) when the number of slabs is already no larger than
this minimum value.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>

Link: https://lore.kernel.org/r/984fa426-2b7b-4b77-5ce8-766619575b7f@suse.com
Signed-off-by: Juergen Gross <jgross@suse.com>
This commit is contained in:
Jan Beulich 2021-09-07 14:06:37 +02:00 committed by Juergen Gross
parent 79ca5f778a
commit cabb7f89b2
1 changed files with 2 additions and 2 deletions
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4
drivers/xen/swiotlb-xen.c
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@ -207,7 +207,7 @@ int __ref xen_swiotlb_init(void)
swiotlb_set_max_segment(PAGE_SIZE);
return 0;
error:
if (repeat--) {
if (nslabs > 1024 && repeat--) {
/* Min is 2MB */
nslabs = max(1024UL, ALIGN(nslabs >> 1, IO_TLB_SEGSIZE));
bytes = nslabs << IO_TLB_SHIFT;
@ -243,7 +243,7 @@ void __init xen_swiotlb_init_early(void)
rc = xen_swiotlb_fixup(start, nslabs);
if (rc) {
memblock_free(__pa(start), PAGE_ALIGN(bytes));
if (repeat--) {
if (nslabs > 1024 && repeat--) {
/* Min is 2MB */
nslabs = max(1024UL, ALIGN(nslabs >> 1, IO_TLB_SEGSIZE));
bytes = nslabs << IO_TLB_SHIFT;