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iova: Remove iovad->rcaches check in iova_rcache_get()

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The iovad->rcaches check in iova_rcache_get() is pretty much useless
without the same check in iova_rcache_insert().

Instead of adding this symmetric check to fastpath iova_rcache_insert(),
drop the check in iova_rcache_get() in favour of making the IOVA domain
rcache init more robust to failure in future.

Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/1662557681-145906-4-git-send-email-john.garry@huawei.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
John Garry 2022-09-07 21:34:41 +08:00 committed by Joerg Roedel
parent 8b2818c7be
commit 189cb8fec1
1 changed files with 1 additions and 1 deletions
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2
drivers/iommu/iova.c
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@ -875,7 +875,7 @@ static unsigned long iova_rcache_get(struct iova_domain *iovad,
{
unsigned int log_size = order_base_2(size);
if (log_size >= IOVA_RANGE_CACHE_MAX_SIZE || !iovad->rcaches)
if (log_size >= IOVA_RANGE_CACHE_MAX_SIZE)
return 0;
return __iova_rcache_get(&iovad->rcaches[log_size], limit_pfn - size);