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KVM: x86/xen: Simplify eventfd IOCTLs 

Port number is validated in kvm_xen_setattr_evtchn().
Remove superfluous checks in kvm_xen_eventfd_assign() and
kvm_xen_eventfd_update().

Signed-off-by: Michal Luczaj <mhal@rbox.co>
Message-Id: <20221222203021.1944101-3-mhal@rbox.co>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Message-Id: <20221226120320.1125390-4-dwmw2@infradead.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Michal Luczaj 2022-12-26 12:03:18 +00:00 committed by Paolo Bonzini
parent 70eae03087
commit 1c14faa508
1 changed files with 1 additions and 7 deletions
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8
arch/x86/kvm/xen.c
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@ -1810,9 +1810,6 @@ static int kvm_xen_eventfd_update(struct kvm *kvm,
struct evtchnfd *evtchnfd;
int ret;
if (!port || port >= max_evtchn_port(kvm))
return -EINVAL;
/* Protect writes to evtchnfd as well as the idr lookup. */
mutex_lock(&kvm->lock);
evtchnfd = idr_find(&kvm->arch.xen.evtchn_ports, port);
@ -1858,12 +1855,9 @@ static int kvm_xen_eventfd_assign(struct kvm *kvm,
{
u32 port = data->u.evtchn.send_port;
struct eventfd_ctx *eventfd = NULL;
struct evtchnfd *evtchnfd = NULL;
struct evtchnfd *evtchnfd;
int ret = -EINVAL;
if (!port || port >= max_evtchn_port(kvm))
return -EINVAL;
evtchnfd = kzalloc(sizeof(struct evtchnfd), GFP_KERNEL);
if (!evtchnfd)
return -ENOMEM;