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ANDROID: KVM: arm64: Fix error handling in pKVM FF-A proxy

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__ffa_host_{un}share_ranges() returns the number of {un}shared pages,
and not 0 upon success, so make sure to check for that in the error path
of ffa_host_{un}share_ranges().

Bug: 236751556
Signed-off-by: Quentin Perret <qperret@google.com>
Change-Id: Ie122e394f1bc4ce79fcbb24d2a5c58cd53b3c146
This commit is contained in:
Quentin Perret
2022-06-22 08:19:29 +00:00
parent 854df93a7a
commit 5d95acffca
1 changed files with 2 additions and 2 deletions
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4
arch/arm64/kvm/hyp/nvhe/ffa.c
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@@ -324,7 +324,7 @@ static int ffa_host_share_ranges(struct ffa_mem_region_addr_range *ranges,
int ret = 0;
if (nshared != nranges) {
WARN_ON(__ffa_host_unshare_ranges(ranges, nshared));
WARN_ON(__ffa_host_unshare_ranges(ranges, nshared) != nshared);
ret = FFA_RET_DENIED;
}
@@ -338,7 +338,7 @@ static int ffa_host_unshare_ranges(struct ffa_mem_region_addr_range *ranges,
int ret = 0;
if (nunshared != nranges) {
WARN_ON(__ffa_host_share_ranges(ranges, nunshared));
WARN_ON(__ffa_host_share_ranges(ranges, nunshared) != nunshared);
ret = FFA_RET_DENIED;
}