Clang warns:
drivers/scsi/hpsa.c:5964:6: warning: variable 'dev' is used
uninitialized whenever 'if' condition is true
[-Wsometimes-uninitialized]
if (lockup_detected(h)) {
^~~~~~~~~~~~~~~~~~
drivers/scsi/hpsa.c:6042:6: note: uninitialized use occurs here
if (dev)
^~~
drivers/scsi/hpsa.c:5964:2: note: remove the 'if' if its condition is
always false
if (lockup_detected(h)) {
^~~~~~~~~~~~~~~~~~~~~~~~~
drivers/scsi/hpsa.c:5950:29: note: initialize the variable 'dev' to
silence this warning
struct hpsa_scsi_dev_t *dev;
^
= NULL
1 warning generated.
dev is potentially used uninitialized in the return_reset_status block
for a NULL check if the first 'if (lockup_detected(h))' is taken, as
dev is initialized right after that block. Initialize dev to NULL in
its declaration so that it can be safely checked within the
return_reset_status block.
Fixes: 14991a5bade5 ("scsi: hpsa: correct device resets")
Link: https://github.com/ClangBuiltLinux/linux/issues/492
Signed-off-by: Nathan Chancellor <natechancellor@xxxxxxxxx>
---
drivers/scsi/hpsa.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index c560a4532733..ac8338b0571b 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -5947,7 +5947,7 @@ static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
int rc = SUCCESS;
int i;
struct ctlr_info *h;
- struct hpsa_scsi_dev_t *dev;
+ struct hpsa_scsi_dev_t *dev = NULL;
u8 reset_type;
char msg[48];
unsigned long flags;
--
2.22.0.rc1
