xen/arm: Free p2m entry if fail to add it to RB tree

Release the newly allocated p2m entry if we detect a duplicate in the RB
tree.

Signed-off-by: Hillf Danton <hdanton@sina.com>
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>

diff --git a/arch/arm/xen/p2m.c b/arch/arm/xen/p2m.c
index e70a49f..d3f632c 100644 (file)
--- a/arch/arm/xen/p2m.c
+++ b/arch/arm/xen/p2m.c
@@ -156,6 +156,7 @@ bool __set_phys_to_machine_multi(unsigned long pfn,
        rc = xen_add_phys_to_mach_entry(p2m_entry);
        if (rc < 0) {
                write_unlock_irqrestore(&p2m_lock, irqflags);
+               kfree(p2m_entry);
                return false;
        }
        write_unlock_irqrestore(&p2m_lock, irqflags);