From: Sebastian Ott <sebott@linux.vnet.ibm.com>
Date: Mon, 3 Jul 2017 13:32:23 +0000 (+0200)
Subject: s390/pci: log changes to uid checking
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=5db23179998ded72cb8f58a296c0e99716d7df5b;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

s390/pci: log changes to uid checking

Some hypervisors allow to toggle uid checking at runtime. Log
changes to uid checking in s390dbf.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

diff --git a/arch/s390/pci/pci_clp.c b/arch/s390/pci/pci_clp.c
index bd534b4d40e3..0ae3936e266f 100644
--- a/arch/s390/pci/pci_clp.c
+++ b/arch/s390/pci/pci_clp.c
@@ -24,6 +24,14 @@
 
 bool zpci_unique_uid;
 
+static void update_uid_checking(bool new)
+{
+	if (zpci_unique_uid != new)
+		zpci_dbg(1, "uid checking:%d\n", new);
+
+	zpci_unique_uid = new;
+}
+
 static inline void zpci_err_clp(unsigned int rsp, int rc)
 {
 	struct {
@@ -319,7 +327,7 @@ static int clp_list_pci(struct clp_req_rsp_list_pci *rrb, void *data,
 			goto out;
 		}
 
-		zpci_unique_uid = rrb->response.uid_checking;
+		update_uid_checking(rrb->response.uid_checking);
 		WARN_ON_ONCE(rrb->response.entry_size !=
 			sizeof(struct clp_fh_list_entry));