s390/net: Delete useless checks before function calls

The function debug_unregister() tests whether its argument is
NULL and then returns immediately. Thus the test around the call
is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 7 insertions, 14 deletions

diff --git a/drivers/s390/net/claw.c b/drivers/s390/net/claw.c
index 213e54ee8a66..d609ca09aa94 100644
--- a/drivers/s390/net/claw.c
+++ b/drivers/s390/net/claw.c
@@ -109,10 +109,8 @@ static debug_info_t *claw_dbf_trace;
 static void
 claw_unregister_debug_facility(void)
 {
-        if (claw_dbf_setup)
-                debug_unregister(claw_dbf_setup);
-        if (claw_dbf_trace)
-                debug_unregister(claw_dbf_trace);
+        debug_unregister(claw_dbf_setup);
+        debug_unregister(claw_dbf_trace);
 }
 
 static int
diff --git a/drivers/s390/net/lcs.c b/drivers/s390/net/lcs.c
index 92190aa20b9f..00b7d9c9fe48 100644
--- a/drivers/s390/net/lcs.c
+++ b/drivers/s390/net/lcs.c
@@ -88,10 +88,8 @@ static debug_info_t *lcs_dbf_trace;
 static void
 lcs_unregister_debug_facility(void)
 {
-        if (lcs_dbf_setup)
-                debug_unregister(lcs_dbf_setup);
-        if (lcs_dbf_trace)
-                debug_unregister(lcs_dbf_trace);
+        debug_unregister(lcs_dbf_setup);
+        debug_unregister(lcs_dbf_trace);
 }
 
 static int
diff --git a/drivers/s390/net/netiucv.c b/drivers/s390/net/netiucv.c
index 7e91f54be7ba..33f7040d711d 100644
--- a/drivers/s390/net/netiucv.c
+++ b/drivers/s390/net/netiucv.c
@@ -487,12 +487,9 @@ DEFINE_PER_CPU(char[256], iucv_dbf_txt_buf);
 
 static void iucv_unregister_dbf_views(void)
 {
-        if (iucv_dbf_setup)
-                debug_unregister(iucv_dbf_setup);
-        if (iucv_dbf_data)
-                debug_unregister(iucv_dbf_data);
-        if (iucv_dbf_trace)
-                debug_unregister(iucv_dbf_trace);
+        debug_unregister(iucv_dbf_setup);
+        debug_unregister(iucv_dbf_data);
+        debug_unregister(iucv_dbf_trace);
 }
 static int iucv_register_dbf_views(void)
 {