linux-kernel - [PATCH 3.16.y-ckt 032/185] KVM: mips: use id_to

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Message-Id: <1436951580-15977-33-git-send-email-luis.henriques@canonical.com>
Date:	Wed, 15 Jul 2015 10:10:27 +0100
From:	Luis Henriques <luis.henriques@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Paolo Bonzini <pbonzini@...hat.com>,
	Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 3.16.y-ckt 032/185] KVM: mips: use id_to_memslot correctly

3.16.7-ckt15 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Paolo Bonzini <pbonzini@...hat.com>

commit 69a1220060c1523fd0515216eaa29e22f133b894 upstream.

The argument to KVM_GET_DIRTY_LOG is a memslot id; it may not match the
position in the memslots array, which is sorted by gfn.

Reviewed-by: James Hogan <james.hogan@...tec.com>
Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
[ luis: backported to 3.16:
  - file rename: arch/mips/kvm/mips.c -> arch/mips/kvm/kvm_mips.c ]
Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
---
 arch/mips/kvm/kvm_mips.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/mips/kvm/kvm_mips.c b/arch/mips/kvm/kvm_mips.c
index 59298b97ac39..cc721a3c8996 100644
--- a/arch/mips/kvm/kvm_mips.c
+++ b/arch/mips/kvm/kvm_mips.c
@@ -813,7 +813,7 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
 
 	/* If nothing is dirty, don't bother messing with page tables. */
 	if (is_dirty) {
-		memslot = &kvm->memslots->memslots[log->slot];
+		memslot = id_to_memslot(kvm->memslots, log->slot);
 
 		ga = memslot->base_gfn << PAGE_SHIFT;
 		ga_end = ga + (memslot->npages << PAGE_SHIFT);
--
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