Merge tag 's390-6.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 updates from Alexander Gordeev:

 - Fix a KVM crash on z12 and older machines caused by a wrong
   assumption that Query AP Configuration Information is always
   available.

 - Lower severity of excessive Hypervisor filesystem error messages
   when booting under KVM.

* tag 's390-6.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/ap: fix crash on older machines based on QCI info missing
  s390/hypfs: avoid error message under KVM

2 files changed, 7 insertions, 0 deletions

diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
index 8f1d1cf23d44..59ac98f2bd27 100644
--- a/drivers/s390/crypto/ap_bus.c
+++ b/drivers/s390/crypto/ap_bus.c
@@ -2086,6 +2086,9 @@ static inline void ap_scan_adapter(int ap)
  */
 static bool ap_get_configuration(void)
 {
+	if (!ap_qci_info)	/* QCI not supported */
+		return false;
+
 	memcpy(ap_qci_info_old, ap_qci_info, sizeof(*ap_qci_info));
 	ap_fetch_qci_info(ap_qci_info);
 
diff --git a/drivers/s390/crypto/ap_bus.h b/drivers/s390/crypto/ap_bus.h
index 0c40af157df2..0f17933954fb 100644
--- a/drivers/s390/crypto/ap_bus.h
+++ b/drivers/s390/crypto/ap_bus.h
@@ -148,12 +148,16 @@ struct ap_driver {
 	/*
 	 * Called at the start of the ap bus scan function when
 	 * the crypto config information (qci) has changed.
+	 * This callback is not invoked if there is no AP
+	 * QCI support available.
 	 */
 	void (*on_config_changed)(struct ap_config_info *new_config_info,
 				  struct ap_config_info *old_config_info);
 	/*
 	 * Called at the end of the ap bus scan function when
 	 * the crypto config information (qci) has changed.
+	 * This callback is not invoked if there is no AP
+	 * QCI support available.
 	 */
 	void (*on_scan_complete)(struct ap_config_info *new_config_info,
 				 struct ap_config_info *old_config_info);