Reenabled linux-xen, added patches for Xen Kernel Version 2.6.27.31,

[people/teissler/ipfire-2.x.git] / src / patches / suse-2.6.27.31 / patches.arch / s390-12-14-zfcp_port_reference_counting.patch

diff --git a/src/patches/suse-2.6.27.31/patches.arch/s390-12-14-zfcp_port_reference_counting.patch b/src/patches/suse-2.6.27.31/patches.arch/s390-12-14-zfcp_port_reference_counting.patch
new file mode 100644 (file)
index 0000000..056c8bb
--- /dev/null
+++ b/src/patches/suse-2.6.27.31/patches.arch/s390-12-14-zfcp_port_reference_counting.patch
@@ -0,0 +1,44 @@
+From: Gerald Schaefer <geraldsc@de.ibm.com>
+Subject: zfcp: Fix port reference counting
+References: bnc#487755,LTC#52847
+
+Symptom:     If this problem appears zfcp ports cannot
+             be de-queued since it is checked for a
+             zero refcount.
+Problem:     The port reference counting is wrong for
+             existing zfcp ports when e.g. an adapter
+             gets on-line again.
+Solution:    During port scanning the reference counting
+             for existing ports should not be changed.
+
+Acked-by: John Jolly <jjolly@suse.de>
+---
+ drivers/s390/scsi/zfcp_fc.c |    7 ++++---
+ 1 file changed, 4 insertions(+), 3 deletions(-)
+
+Index: linux-sles11/drivers/s390/scsi/zfcp_fc.c
+===================================================================
+--- linux-sles11.orig/drivers/s390/scsi/zfcp_fc.c
++++ linux-sles11/drivers/s390/scsi/zfcp_fc.c
+@@ -535,6 +535,9 @@ static void zfcp_validate_port(struct zf
+ {
+       struct zfcp_adapter *adapter = port->adapter;
+ 
++      if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC))
++              return;
++
+       atomic_clear_mask(ZFCP_STATUS_COMMON_NOESC, &port->status);
+ 
+       if ((port->supported_classes != 0) ||
+@@ -595,10 +598,8 @@ static int zfcp_scan_eval_gpn_ft(struct 
+               if (acc->wwpn == fc_host_port_name(adapter->scsi_host))
+                       continue;
+               port = zfcp_get_port_by_wwpn(adapter, acc->wwpn);
+-              if (port) {
+-                      zfcp_port_get(port);
++              if (port)
+                       continue;
+-              }
+ 
+               port = zfcp_port_enqueue(adapter, acc->wwpn,
+                                        ZFCP_STATUS_PORT_DID_DID |