ctcm: avoid crash in ctcm_remove_device

Channels are already removed when setting a ctcm-device offline.
Thus ctcm_remove_device must not refer to channel information.
Solution: delete channel information from the trace call in
ctcm_remove_device.

Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 4 deletions

diff --git a/drivers/s390/net/ctcm_main.c b/drivers/s390/net/ctcm_main.c
index 77f4033a0f4f..54c4649a493b 100644
--- a/drivers/s390/net/ctcm_main.c
+++ b/drivers/s390/net/ctcm_main.c
@@ -1677,10 +1677,8 @@ static void ctcm_remove_device(struct ccwgroup_device *cgdev)
         BUG_ON(priv == NULL);
 
         CTCM_DBF_TEXT_(SETUP, CTC_DBF_INFO,
-                        "removing device %s, r/w = %s/%s, proto : %d",
-                        priv->channel[READ]->netdev->name,
-                        priv->channel[READ]->id, priv->channel[WRITE]->id,
-                        priv->protocol);
+                        "removing device %p, proto : %d",
+                        cgdev, priv->protocol);
 
         if (cgdev->state == CCWGROUP_ONLINE)
                 ctcm_shutdown_device(cgdev);