From c7985de0a7f0769d6e4e112b18314aceecf2642c Mon Sep 17 00:00:00 2001
From: David Marchand <david.marchand@6wind.com>
Date: Thu, 21 Jan 2016 12:23:19 +0100
Subject: [PATCH] remove unneeded tests for NULL when freeing

free() already handles NULL pointer.

Signed-off-by: David Marchand <david.marchand@6wind.com>
---
 app/test/test_devargs.c                       |  3 +-
 app/test/test_link_bonding.c                  |  6 ++--
 app/test/test_pci.c                           |  3 +-
 app/test/test_ring.c                          | 36 +++++++------------
 drivers/net/xenvirt/rte_eth_xenvirt.c         |  6 ++--
 drivers/net/xenvirt/rte_mempool_gntalloc.c    |  9 ++---
 examples/ip_pipeline/cpu_core_map.c           |  3 +-
 .../pipeline_flow_classification_be.c         |  6 ++--
 examples/vhost_xen/vhost_monitor.c            |  3 +-
 examples/vhost_xen/xenstore_parse.c           | 33 ++++++-----------
 lib/librte_eal/common/eal_common_devargs.c    |  3 +-
 lib/librte_eal/linuxapp/eal/eal_memory.c      |  3 +-
 lib/librte_ether/rte_ethdev.c                 |  6 ++--
 lib/librte_kvargs/rte_kvargs.c                |  4 +--
 14 files changed, 41 insertions(+), 83 deletions(-)

diff --git a/app/test/test_devargs.c b/app/test/test_devargs.c
index 049f32d43f..e5a9aa0bac 100644
--- a/app/test/test_devargs.c
+++ b/app/test/test_devargs.c
@@ -48,8 +48,7 @@ static void free_devargs_list(void)
 	while (!TAILQ_EMPTY(&devargs_list)) {
 		devargs = TAILQ_FIRST(&devargs_list);
 		TAILQ_REMOVE(&devargs_list, devargs, next);
-		if (devargs->args)
-			free(devargs->args);
+		free(devargs->args);
 		free(devargs);
 	}
 }
diff --git a/app/test/test_link_bonding.c b/app/test/test_link_bonding.c
index 2d989586b2..7cbc289140 100644
--- a/app/test/test_link_bonding.c
+++ b/app/test/test_link_bonding.c
@@ -4023,10 +4023,8 @@ test_close_bonded_device(void)
 static void
 testsuite_teardown(void)
 {
-	if (test_params->pkt_eth_hdr != NULL) {
-		free(test_params->pkt_eth_hdr);
-		test_params->pkt_eth_hdr = NULL;
-	}
+	free(test_params->pkt_eth_hdr);
+	test_params->pkt_eth_hdr = NULL;
 
 	/* Clean up and remove slaves from bonded device */
 	remove_slaves_and_stop_bonded_device();
diff --git a/app/test/test_pci.c b/app/test/test_pci.c
index 5530d9974a..0ed357e66e 100644
--- a/app/test/test_pci.c
+++ b/app/test/test_pci.c
@@ -139,8 +139,7 @@ static void free_devargs_list(void)
 	while (!TAILQ_EMPTY(&devargs_list)) {
 		devargs = TAILQ_FIRST(&devargs_list);
 		TAILQ_REMOVE(&devargs_list, devargs, next);
-		if (devargs->args)
-			free(devargs->args);
+		free(devargs->args);
 		free(devargs);
 	}
 }
diff --git a/app/test/test_ring.c b/app/test/test_ring.c
index e5614de739..943c350cf0 100644
--- a/app/test/test_ring.c
+++ b/app/test/test_ring.c
@@ -471,17 +471,13 @@ test_ring_basic(void)
 	if (ret != 0)
 		goto fail;
 
-	if (src)
-		free(src);
-	if (dst)
-		free(dst);
+	free(src);
+	free(dst);
 	return 0;
 
  fail:
-	if (src)
-		free(src);
-	if (dst)
-		free(dst);
+	free(src);
+	free(dst);
 	return -1;
 }
 
@@ -759,17 +755,13 @@ test_ring_burst_basic(void)
 		goto fail;
 
 	/* Free memory before test completed */
-	if (src)
-		free(src);
-	if (dst)
-		free(dst);
+	free(src);
+	free(dst);
 	return 0;
 
  fail:
-	if (src)
-		free(src);
-	if (dst)
-		free(dst);
+	free(src);
+	free(dst);
 	return -1;
 }
 
@@ -1168,17 +1160,13 @@ test_ring_stats(void)
 	memset(&r->stats[lcore_id], 0, sizeof(r->stats[lcore_id]));
 
 	/* Free memory before test completed */
-	if (src)
-		free(src);
-	if (dst)
-		free(dst);
+	free(src);
+	free(dst);
 	return 0;
 
 fail:
-	if (src)
-		free(src);
-	if (dst)
-		free(dst);
+	free(src);
+	free(dst);
 	return -1;
 #endif
 }
diff --git a/drivers/net/xenvirt/rte_eth_xenvirt.c b/drivers/net/xenvirt/rte_eth_xenvirt.c
index 3353bcbab2..3f318063fe 100644
--- a/drivers/net/xenvirt/rte_eth_xenvirt.c
+++ b/drivers/net/xenvirt/rte_eth_xenvirt.c
@@ -431,10 +431,8 @@ gntalloc_vring_create(int queue_type, uint32_t size, int vtidx)
 		va = NULL;
 	}
 out:
-	if (pa_arr)
-		free(pa_arr);
-	if (gref_arr)
-		free(gref_arr);
+	free(pa_arr);
+	free(gref_arr);
 
 	return va;
 }
diff --git a/drivers/net/xenvirt/rte_mempool_gntalloc.c b/drivers/net/xenvirt/rte_mempool_gntalloc.c
index 0585f08603..7bfbfda3a1 100644
--- a/drivers/net/xenvirt/rte_mempool_gntalloc.c
+++ b/drivers/net/xenvirt/rte_mempool_gntalloc.c
@@ -229,15 +229,12 @@ mmap_failed:
 			munmap(gnt_arr[i].va, pg_sz);
 	}
 out:
-	if (gnt_arr)
-		free(gnt_arr);
+	free(gnt_arr);
 	if (orig_va)
 		munmap(orig_va, sz);
 	if (mp == NULL) {
-		if (gref_arr)
-			free(gref_arr);
-		if (pa_arr)
-			free(pa_arr);
+		free(gref_arr);
+		free(pa_arr);
 
 		/* some gref has already been de-allocated from the list in the driver,
 		 * so dealloc one by one, and it is safe to deallocate twice
diff --git a/examples/ip_pipeline/cpu_core_map.c b/examples/ip_pipeline/cpu_core_map.c
index 331b946e47..2a91f31a15 100644
--- a/examples/ip_pipeline/cpu_core_map.c
+++ b/examples/ip_pipeline/cpu_core_map.c
@@ -488,6 +488,5 @@ cpu_core_map_get_lcore_id(struct cpu_core_map *map,
 void
 cpu_core_map_free(struct cpu_core_map *map)
 {
-	if (map)
-		free(map);
+	free(map);
 }
diff --git a/examples/ip_pipeline/pipeline/pipeline_flow_classification_be.c b/examples/ip_pipeline/pipeline/pipeline_flow_classification_be.c
index e808e791b6..ac80fc6467 100644
--- a/examples/ip_pipeline/pipeline/pipeline_flow_classification_be.c
+++ b/examples/ip_pipeline/pipeline/pipeline_flow_classification_be.c
@@ -333,10 +333,8 @@ pipeline_fc_parse_args(struct pipeline_flow_classification *p,
 	return 0;
 
 error_parse:
-	if (key_mask_str != NULL)
-		free(key_mask_str);
-	if (p->key_mask != NULL)
-		free(p->key_mask);
+	free(key_mask_str);
+	free(p->key_mask);
 	return -1;
 }
 
diff --git a/examples/vhost_xen/vhost_monitor.c b/examples/vhost_xen/vhost_monitor.c
index a891c56771..7cc5c2fbd2 100644
--- a/examples/vhost_xen/vhost_monitor.c
+++ b/examples/vhost_xen/vhost_monitor.c
@@ -296,8 +296,7 @@ virtio_net_config_ll *new_device(unsigned int virtio_idx, struct xen_guest *gues
 	add_config_ll_entry(new_ll_dev);
 	return new_ll_dev;
 err:
-	if (new_ll_dev)
-		free(new_ll_dev);
+	free(new_ll_dev);
 	rte_free(virtqueue_rx);
 	rte_free(virtqueue_tx);
 
diff --git a/examples/vhost_xen/xenstore_parse.c b/examples/vhost_xen/xenstore_parse.c
index eb629e2d29..26d2432084 100644
--- a/examples/vhost_xen/xenstore_parse.c
+++ b/examples/vhost_xen/xenstore_parse.c
@@ -203,8 +203,7 @@ xen_free_gntnode(struct xen_gntnode *gntnode)
 {
 	if (gntnode == NULL)
 		return;
-	if (gntnode->gnt_info)
-		free(gntnode->gnt_info);
+	free(gntnode->gnt_info);
 	free(gntnode);
 }
 
@@ -286,14 +285,10 @@ parse_gntnode(int dom_id, char *path)
 	return gntnode;
 
 err:
-	if (gnt)
-		free(gnt);
-	if (gntnode)
-		free(gntnode);
-	if (gref_list)
-		free(gref_list);
-	if (buf)
-		free(buf);
+	free(gnt);
+	free(gntnode);
+	free(gref_list);
+	free(buf);
 	return NULL;
 }
 
@@ -412,8 +407,7 @@ parse_mpool_va(struct xen_mempool *mempool)
 	}
 	ret = 0;
 out:
-	if (buf)
-		free(buf);
+	free(buf);
 	return ret;
 }
 
@@ -460,8 +454,7 @@ cleanup_mempool(struct xen_mempool *mempool)
 	}
 	mempool->pindex = NULL;
 
-	if (mempool->mempfn_tbl)
-		free(mempool->mempfn_tbl);
+	free(mempool->mempfn_tbl);
 	mempool->mempfn_tbl = NULL;
 }
 
@@ -559,8 +552,7 @@ xen_map_vringflag(struct xen_vring *vring)
 	free(buf);
 	return 0;
 err:
-	if (buf)
-		free(buf);
+	free(buf);
 	if (vring->flag) {
 		munmap(vring->flag, pg_sz);
 		vring->flag = NULL;
@@ -622,8 +614,7 @@ cleanup_vring(struct xen_vring *vring)
 	}
 	vring->rx_pindex = NULL;
 
-	if (vring->rxpfn_tbl)
-		free(vring->rxpfn_tbl);
+	free(vring->rxpfn_tbl);
 	vring->rxpfn_tbl = NULL;
 
 	if (vring->txvring_addr) {
@@ -644,8 +635,7 @@ cleanup_vring(struct xen_vring *vring)
 	}
 	vring->tx_pindex = NULL;
 
-	if (vring->txpfn_tbl)
-		free(vring->txpfn_tbl);
+	free(vring->txpfn_tbl);
 	vring->txpfn_tbl = NULL;
 
 	if (vring->flag) {
@@ -680,8 +670,7 @@ xen_parse_etheraddr(struct xen_vring *vring)
 		goto out;
 	ret = 0;
 out:
-	if (buf)
-		free(buf);
+	free(buf);
 	return ret;
 }
 
diff --git a/lib/librte_eal/common/eal_common_devargs.c b/lib/librte_eal/common/eal_common_devargs.c
index 5d075d0436..2bfe54a194 100644
--- a/lib/librte_eal/common/eal_common_devargs.c
+++ b/lib/librte_eal/common/eal_common_devargs.c
@@ -120,8 +120,7 @@ rte_eal_devargs_add(enum rte_devtype devtype, const char *devargs_str)
 	return 0;
 
 fail:
-	if (buf)
-		free(buf);
+	free(buf);
 	if (devargs) {
 		free(devargs->args);
 		free(devargs);
diff --git a/lib/librte_eal/linuxapp/eal/eal_memory.c b/lib/librte_eal/linuxapp/eal/eal_memory.c
index 48c6175350..6008533b0d 100644
--- a/lib/librte_eal/linuxapp/eal/eal_memory.c
+++ b/lib/librte_eal/linuxapp/eal/eal_memory.c
@@ -1404,8 +1404,7 @@ rte_eal_hugepage_init(void)
 	return 0;
 
 fail:
-	if (tmp_hp)
-		free(tmp_hp);
+	free(tmp_hp);
 	return -1;
 }
 
diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
index ed971b4909..af990e2794 100644
--- a/lib/librte_ether/rte_ethdev.c
+++ b/lib/librte_ether/rte_ethdev.c
@@ -586,10 +586,8 @@ rte_eth_dev_attach_vdev(const char *vdevargs, uint8_t *port_id)
 
 	ret = 0;
 end:
-	if (name)
-		free(name);
-	if (args)
-		free(args);
+	free(name);
+	free(args);
 
 	if (ret < 0)
 		RTE_LOG(ERR, EAL, "Driver, cannot attach the device\n");
diff --git a/lib/librte_kvargs/rte_kvargs.c b/lib/librte_kvargs/rte_kvargs.c
index c2dd051336..8d56abd4c8 100644
--- a/lib/librte_kvargs/rte_kvargs.c
+++ b/lib/librte_kvargs/rte_kvargs.c
@@ -177,9 +177,7 @@ rte_kvargs_free(struct rte_kvargs *kvlist)
 	if (!kvlist)
 		return;
 
-	if (kvlist->str != NULL)
-		free(kvlist->str);
-
+	free(kvlist->str);
 	free(kvlist);
 }
 
-- 
2.20.1