clang warns:
drivers/scsi/ibmvscsi/ibmvscsi.c:2126:7: warning: variable 'rc' is used
uninitialized whenever switch case is taken [-Wsometimes-uninitialized]
case IBMVSCSI_HOST_ACTION_NONE:
^~~~~~~~~~~~~~~~~~~~~~~~~
drivers/scsi/ibmvscsi/ibmvscsi.c:2151:6: note: uninitialized use occurs
here
if (rc) {
^~
Initialize rc to zero in the case statements that clang mentions so that
the atomic_set and dev_err statement don't trigger for them.
Fixes: 035a3c4046b5 ("scsi: ibmvscsi: redo driver work thread to use enum action states")
Link: https://github.com/ClangBuiltLinux/linux/issues/502
Suggested-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Signed-off-by: Nathan Chancellor <natechancellor@xxxxxxxxx>
---
v1 -> v2:
* Initialize rc in the case statements, rather than at the top of the
function, as suggested by Michael.
drivers/scsi/ibmvscsi/ibmvscsi.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c
index 65053daef5f7..3b5647d622d9 100644
--- a/drivers/scsi/ibmvscsi/ibmvscsi.c
+++ b/drivers/scsi/ibmvscsi/ibmvscsi.c
@@ -2109,9 +2109,6 @@ static void ibmvscsi_do_work(struct ibmvscsi_host_data *hostdata)
spin_lock_irqsave(hostdata->host->host_lock, flags);
switch (hostdata->action) {
- case IBMVSCSI_HOST_ACTION_NONE:
- case IBMVSCSI_HOST_ACTION_UNBLOCK:
- break;
case IBMVSCSI_HOST_ACTION_RESET:
spin_unlock_irqrestore(hostdata->host->host_lock, flags);
rc = ibmvscsi_reset_crq_queue(&hostdata->queue, hostdata);
@@ -2128,7 +2125,10 @@ static void ibmvscsi_do_work(struct ibmvscsi_host_data *hostdata)
if (!rc)
rc = ibmvscsi_send_crq(hostdata, 0xC001000000000000LL, 0);
break;
+ case IBMVSCSI_HOST_ACTION_NONE:
+ case IBMVSCSI_HOST_ACTION_UNBLOCK:
default:
+ rc = 0;
break;
}
--
2.22.0.rc3
