[PATCH] scsi: elx: efct: Do not use id uninitialized in efct_lio_setup_session()

[PATCH] scsi: elx: efct: Do not use id uninitialized in efct_lio_setup_session()

[Nathan Chancellor]

clang warns:

drivers/scsi/elx/efct/efct_lio.c:1216:24: warning: variable 'id' is
uninitialized when used here [-Wuninitialized]
                      se_sess, node, id);
                                     ^~

Shuffle the debug print after id's initialization so that the actual
value is printed.

Fixes: 692e5d73a811 ("scsi: elx: efct: LIO backend interface routines")
Link: https://github.com/ClangBuiltLinux/linux/issues/1397
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
---
 drivers/scsi/elx/efct/efct_lio.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/elx/efct/efct_lio.c b/drivers/scsi/elx/efct/efct_lio.c
index e1bab2b17e4d..b7d69ff29c09 100644
--- a/drivers/scsi/elx/efct/efct_lio.c
+++ b/drivers/scsi/elx/efct/efct_lio.c
@@ -1212,12 +1212,12 @@ static void efct_lio_setup_session(struct work_struct *work)
 		return;
 	}
 
-	efc_log_debug(efct, "new initiator sess=%p node=%p id: %llx\n",
-		      se_sess, node, id);
-
 	tgt_node = node->tgt_node;
 	id = (u64) tgt_node->port_fc_id << 32 | tgt_node->node_fc_id;
 
+	efc_log_debug(efct, "new initiator sess=%p node=%p id: %llx\n",
+		      se_sess, node, id);
+
 	if (xa_err(xa_store(&efct->lookup, id, tgt_node, GFP_KERNEL)))
 		efc_log_err(efct, "Node lookup store failed\n");
 

base-commit: ebc076b3eddc807729bd81f7bc48e798a3ddc477
-- 
2.32.0.93.g670b81a890

Re: [PATCH] scsi: elx: efct: Do not use id uninitialized in efct_lio_setup_session()

[James Smart]

On 6/16/2021 11:17 PM, Nathan Chancellor wrote:
> clang warns:
> 
> drivers/scsi/elx/efct/efct_lio.c:1216:24: warning: variable 'id' is
> uninitialized when used here [-Wuninitialized]
>                        se_sess, node, id);
>                                       ^~
> 
> Shuffle the debug print after id's initialization so that the actual
> value is printed.
> 
> Fixes: 692e5d73a811 ("scsi: elx: efct: LIO backend interface routines")
> Link: https://github.com/ClangBuiltLinux/linux/issues/1397
> Signed-off-by: Nathan Chancellor <nathan@kernel.org>
> ---
>   drivers/scsi/elx/efct/efct_lio.c | 6 +++---
>   1 file changed, 3 insertions(+), 3 deletions(-)
> 

Thanks

Reviewed-by: James Smart <jsmart2021@gmail.com>

-- james

Re: [PATCH] scsi: elx: efct: Do not use id uninitialized in efct_lio_setup_session()

[Martin K. Petersen]

Nathan,

> clang warns:
>
> drivers/scsi/elx/efct/efct_lio.c:1216:24: warning: variable 'id' is
> uninitialized when used here [-Wuninitialized]
>                       se_sess, node, id);
>                                      ^~
>
> Shuffle the debug print after id's initialization so that the actual
> value is printed.

Applied to 5.14/scsi-staging, thanks!

-- 
Martin K. Petersen	Oracle Linux Engineering