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VMCI: Fix broken context ID retrieval 

I'm an idiot.  The context ID can be a really large unsigned number, which
means it'll appear negative as an int.  So actually the right fix here is just
to set it regardless of the returned value (but only for this particular
hypercall; normally we would check it).

Acked-by: Dmitry Torokhov <dtor@vmware.com>
Signed-off-by: Andy King <acking@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy King 2013-01-22 09:15:04 -08:00 committed by Greg Kroah-Hartman
parent 74465645cd
commit 5a19b78972
1 changed files with 1 additions and 4 deletions
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5
drivers/misc/vmw_vmci/vmci_guest.c
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@ -81,16 +81,13 @@ bool vmci_guest_code_active(void)
u32 vmci_get_vm_context_id(void)
{
if (vm_context_id == VMCI_INVALID_ID) {
int result;
struct vmci_datagram get_cid_msg;
get_cid_msg.dst =
vmci_make_handle(VMCI_HYPERVISOR_CONTEXT_ID,
VMCI_GET_CONTEXT_ID);
get_cid_msg.src = VMCI_ANON_SRC_HANDLE;
get_cid_msg.payload_size = 0;
result = vmci_send_datagram(&get_cid_msg);
if (result >= 0)
vm_context_id = result;
vm_context_id = vmci_send_datagram(&get_cid_msg);
}
return vm_context_id;
}