powerpc/fsl_pci: Check for get_user/probe_kernel_address failure

Signed-off-by: Scott Wood <scottwood@freescale.com>
Reported-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Hongtao Jia <hongtao.jia@freescale.com>

diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c
index ebc1f41..c42609d 100644 (file)
--- a/arch/powerpc/sysdev/fsl_pci.c
+++ b/arch/powerpc/sysdev/fsl_pci.c
@@ -1002,7 +1002,7 @@ int fsl_pci_mcheck_exception(struct pt_regs *regs)
                        ret = probe_kernel_address(regs->nip, inst);
                }
 
-               if (mcheck_handle_load(regs, inst)) {
+               if (!ret && mcheck_handle_load(regs, inst)) {
                        regs->nip += 4;
                        return 1;
                }