x86: fix leak un ioremap_page_range() failure

Jan Beulich noticed it during code review that if a driver's ioremap()
fails (say due to -ENOMEM) then we might leak the struct vm_area.

Free it properly.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 882328e..ac3c959 100644 (file)
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -162,7 +162,7 @@ static void __iomem *__ioremap(unsigned long phys_addr, unsigned long size,
        area->phys_addr = phys_addr;
        vaddr = (unsigned long) area->addr;
        if (ioremap_page_range(vaddr, vaddr + size, phys_addr, prot)) {
-               remove_vm_area((void *)(vaddr & PAGE_MASK));
+               free_vm_area(area);
                return NULL;
        }