ehea: Fix DLPAR memory handling

The ehea busmap must be allocated only once in the first of many calls of the
ehea_create_busmap_callback.

Signed-off-by: Hannes Hering <hering2@de.ibm.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/net/ehea/ehea_qmr.c b/drivers/net/ehea/ehea_qmr.c
index 140f05baafd8..db8a9257e680 100644
--- a/drivers/net/ehea/ehea_qmr.c
+++ b/drivers/net/ehea/ehea_qmr.c
@@ -595,7 +595,8 @@ static int ehea_create_busmap_callback(unsigned long pfn,
         end_section = start_section + ((nr_pages * PAGE_SIZE) / EHEA_SECTSIZE);
         mr_len = *(unsigned long *)arg;
 
-        ehea_bmap = kzalloc(sizeof(struct ehea_bmap), GFP_KERNEL);
+        if (!ehea_bmap)
+                ehea_bmap = kzalloc(sizeof(struct ehea_bmap), GFP_KERNEL);
         if (!ehea_bmap)
                 return -ENOMEM;