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SubjectRe: [PATCH] kvm: vmx: Fix entry nubmer check for add_atomic_switch_msr()
On Thu, Feb 14, 2019 at 12:08:58PM +0800, Xiaoyao Li wrote:
> Commit ca83b4a7f2d068da79a0 ("x86/KVM/VMX: Add find_msr() helper function")
> introduces the helper function find_msr(), which returns -ENOENT when
> not find the msr in vmx->msr_autoload.guest/host. Correct checking contion

s/not find/cannot find/
s/contion/condition/ ?

> of no more available entry in vmx->msr_autoload.
>
> Fixes: ca83b4a7f2d0 ("x86/KVM/VMX: Add find_msr() helper function")
> Signed-off-by: Xiaoyao Li <xiaoyao.li@linux.intel.com>
> ---
> arch/x86/kvm/vmx/vmx.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
> index 95d618045001..1aaef2d536bd 100644
> --- a/arch/x86/kvm/vmx/vmx.c
> +++ b/arch/x86/kvm/vmx/vmx.c
> @@ -863,7 +863,8 @@ static void add_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr,
> if (!entry_only)
> j = find_msr(&m->host, msr);
>
> - if (i == NR_AUTOLOAD_MSRS || j == NR_AUTOLOAD_MSRS) {
> + if ((i < 0 && m->guest.nr == NR_AUTOLOAD_MSRS) ||
> + (j < 0 && m->host.nr == NR_AUTOLOAD_MSRS)) {
> printk_once(KERN_WARNING "Not enough msr switch entries. "
> "Can't add msr %x\n", msr);
> return;
> --
> 2.19.1
>

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