[PATCH 1/4] cxgb4: remove redundant NULL check

Fix below warnings reported by coccicheck:
./drivers/net/ethernet/chelsio/cxgb4/clip_tbl.c:327:3-9: WARNING: NULL
check before some freeing functions is not needed.

Reported-by: Abaci Robot <redacted>
Signed-off-by: Yang Li <redacted>
---
 drivers/net/ethernet/chelsio/cxgb4/clip_tbl.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/chelsio/cxgb4/clip_tbl.c b/drivers/net/ethernet/chelsio/cxgb4/clip_tbl.c
index ce28820..12fcf84 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/clip_tbl.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/clip_tbl.c

@@ -323,8 +323,7 @@ void t4_cleanup_clip_tbl(struct adapter *adap)
 	struct clip_tbl *ctbl = adap->clipt;
 
 	if (ctbl) {
-		if (ctbl->cl_list)
-			kvfree(ctbl->cl_list);
+		kvfree(ctbl->cl_list);
 		kvfree(ctbl);
 	}
 }

-- 
1.8.3.1

On Mon, 25 Jan 2021 17:47:22 +0800 Yang Li wrote:

Fix below warnings reported by coccicheck:
./drivers/net/ethernet/chelsio/cxgb4/clip_tbl.c:327:3-9: WARNING: NULL
check before some freeing functions is not needed.

Reported-by: Abaci Robot <redacted>
Signed-off-by: Yang Li <redacted>

These 4 patches change the same driver in the same way, please squash
them all into a single patch and resend.

Please use [PATCH net-next] as the subject tag.

Fix below warnings reported by coccicheck:
 ./drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.c:533:2-8: WARNING:
NULL check before some freeing functions is not needed.

Reported-by: Abaci Robot <redacted>
Signed-off-by: Yang Li <redacted>
---
 drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.c
index dede025..97a811f 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.c

@@ -525,12 +525,10 @@ struct cxgb4_tc_u32_table *cxgb4_init_tc_u32(struct adapter *adap)
 	for (i = 0; i < t->size; i++) {
 		struct cxgb4_link *link = &t->table[i];
 
-		if (link->tid_map)
-			kvfree(link->tid_map);
+		kvfree(link->tid_map);
 	}
 
-	if (t)
-		kvfree(t);
+	kvfree(t);
 
 	return NULL;
 }

-- 
1.8.3.1

Fix below warnings reported by coccicheck:
./drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c:3558:2-8: WARNING: NULL
check before some freeing functions is not needed.

Reported-by: Abaci Robot <redacted>
Signed-off-by: Yang Li <redacted>
---
 drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c b/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c
index 75474f8..94eb8a6 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c

@@ -3554,8 +3554,7 @@ int cudbg_collect_qdesc(struct cudbg_init *pdbg_init,
 	}
 
 out_free:
-	if (data)
-		kvfree(data);
+	kvfree(data);
 
 #undef QDESC_GET_FLQ
 #undef QDESC_GET_RXQ

-- 
1.8.3.1

Fix below warnings reported by coccicheck:
./drivers/net/ethernet/chelsio/cxgb4/cxgb4_cudbg.c:161:2-7: WARNING:
NULL check before some freeing functions is not needed.

Reported-by: Abaci Robot <redacted>
Signed-off-by: Yang Li <redacted>
---
 drivers/net/ethernet/chelsio/cxgb4/cxgb4_cudbg.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_cudbg.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_cudbg.c
index 77648e4..dd66b24 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_cudbg.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_cudbg.c

@@ -157,8 +157,7 @@ static int cudbg_alloc_compress_buff(struct cudbg_init *pdbg_init)
 
 static void cudbg_free_compress_buff(struct cudbg_init *pdbg_init)
 {
-	if (pdbg_init->compress_buff)
-		vfree(pdbg_init->compress_buff);
+	vfree(pdbg_init->compress_buff);
 }
 
 int cxgb4_cudbg_collect(struct adapter *adap, void *buf, u32 *buf_size,

-- 
1.8.3.1

On Monday, January 01/25/21, 2021 at 17:47:24 +0800, Yang Li wrote:

NAK. The above check is necessary.

pdbg_init->compress_buff may be NULL when Zlib is unavailable or when
pdbg_init->compress_buff allocation fails, in which case we ignore error
and continue without compression.

-		vfree(pdbg_init->compress_buff);
+	vfree(pdbg_init->compress_buff);
 }
 
 int cxgb4_cudbg_collect(struct adapter *adap, void *buf, u32 *buf_size,
-- 
1.8.3.1

On Monday, January 01/25/21, 2021 at 17:47:25 +0800, Yang Li wrote:

This patch is wrong. NAK.

What if the call to link->tid_map = kvcalloc() fails above? it still goes ahead
and calls kvfree(link->tid_map), which is wrong.

+		kvfree(link->tid_map);
 	}
 
-	if (t)
-		kvfree(t);
+	kvfree(t);
 
 	return NULL;
 }
-- 
1.8.3.1