scsi: zfcp: drop old default switch case which might paper over missing case

This was introduced with v2.6.27 commit 287ac01acf22 ("[SCSI] zfcp: Cleanup
code in zfcp_erp.c") but would now suppress helpful -Wswitch compiler
warnings when building with W=1 such as the following forced example:

drivers/s390/scsi/zfcp_erp.c: In function 'zfcp_erp_setup_act':
drivers/s390/scsi/zfcp_erp.c:220:2: warning: enumeration value 'ZFCP_ERP_ACTION_REOPEN_PORT' not handled in switch [-Wswitch]
  switch (need) {
  ^~~~~~

But then again, only with W=1 we would notice unhandled enum cases.
Without the default cases and a missed unhandled enum case, the code might
perform unforeseen things we might not want...

As of today, we never run through the removed default case, so removing it
is no functional change.  In the future, we never should run through a
default case but introduce the necessary specific case(s) to handle new
functionality.

Signed-off-by: Steffen Maier <maier@linux.ibm.com>
Reviewed-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c
index 9345fed3bb37cd26fd953c1e701afac0075a22b3..744a64680d5b0d16c982012bfe2b351becd54a9a 100644 (file)
--- a/drivers/s390/scsi/zfcp_erp.c
+++ b/drivers/s390/scsi/zfcp_erp.c
@@ -257,9 +257,6 @@ static struct zfcp_erp_action *zfcp_erp_setup_act(enum zfcp_erp_act_type need,
                      ZFCP_STATUS_COMMON_RUNNING))
                        act_status |= ZFCP_STATUS_ERP_CLOSE_ONLY;
                break;
-
-       default:
-               return NULL;
        }
 
        WARN_ON_ONCE(erp_action->adapter != adapter);