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

This was introduced with v2.6.27 commit 287ac01acf ("[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>
This commit is contained in:
Steffen Maier 2018-11-08 15:44:58 +01:00 committed by Martin K. Petersen
parent 0c902936e5
commit 399b6c8bc9
1 changed files with 0 additions and 3 deletions
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3
drivers/s390/scsi/zfcp_erp.c
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@ -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);