From: Steffen Maier maier@linux.ibm.com
[ Upstream commit 0c902936e55cff9335b27ed632fc45e7115ced75 ]
This was introduced with v4.18 commit 8c3d20aada70 ("scsi: zfcp: fix missing REC trigger trace for all objects in ERP_FAILED") 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_handle_failed': drivers/s390/scsi/zfcp_erp.c:126:2: warning: enumeration value 'ZFCP_ERP_ACTION_REOPEN_PORT_FORCED' not handled in switch [-Wswitch] switch (want) { ^~~~~~
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 Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/s390/scsi/zfcp_erp.c | 3 --- 1 file changed, 3 deletions(-)
diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c index cc62d8cc8cfdd..d5214c4eb9ddb 100644 --- a/drivers/s390/scsi/zfcp_erp.c +++ b/drivers/s390/scsi/zfcp_erp.c @@ -178,9 +178,6 @@ static int zfcp_erp_handle_failed(int want, struct zfcp_adapter *adapter, adapter, ZFCP_STATUS_COMMON_ERP_FAILED); } break; - default: - need = 0; - break; }
return need;