From: Joakim Tjernlund <joakim.tjernlund@infinera.com>
Date: Tue, 5 Sep 2017 11:59:43 +0000 (+0200)
Subject: powerpc/fsl_pci: Correct fsl_pci_mcheck_exception
X-Git-Tag: v5.15~9492^2~54^2~2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=bb8651e5ce2c23c36998b263272ab2f9203f5a2e;p=platform%2Fkernel%2Flinux-starfive.git

powerpc/fsl_pci: Correct fsl_pci_mcheck_exception

get_user() had it args reversed causing NIP to be NULL:ed instead
of fixing up the PCI access.

Note: This still hangs my P1020 Freescale CPU hard, but at least
I get a NIP now.

Signed-off-by: Joakim Tjernlund <joakim.tjernlund@infinera.com>
Acked-by: Li Yang <leoyang.li@nxp.com>
Signed-off-by: Scott Wood <oss@buserror.net>
---

diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c
index 1e57edd..0c524c2 100644
--- a/arch/powerpc/sysdev/fsl_pci.c
+++ b/arch/powerpc/sysdev/fsl_pci.c
@@ -1070,7 +1070,7 @@ int fsl_pci_mcheck_exception(struct pt_regs *regs)
 	if (is_in_pci_mem_space(addr)) {
 		if (user_mode(regs)) {
 			pagefault_disable();
-			ret = get_user(regs->nip, &inst);
+			ret = get_user(inst, (__u32 __user *)regs->nip);
 			pagefault_enable();
 		} else {
 			ret = probe_kernel_address((void *)regs->nip, inst);