diff --git a/nimble/host/src/ble_gattc.c b/nimble/host/src/ble_gattc.c
index a6ae1470d..c3ff060b0 100644
--- a/nimble/host/src/ble_gattc.c
+++ b/nimble/host/src/ble_gattc.c
@@ -485,7 +485,7 @@ ble_gattc_dbg_assert_proc_not_inserted(struct ble_gattc_proc *proc)
  *****************************************************************************/
 
 static void
-ble_gattc_log_proc_init(char *name)
+ble_gattc_log_proc_init(const char *name)
 {
     BLE_HS_LOG(INFO, "GATT procedure initiated: %s", name);
 }
@@ -587,7 +587,7 @@ ble_gattc_log_read_mult(const uint16_t *handles, uint8_t num_handles)
 static void
 ble_gattc_log_write(uint16_t att_handle, uint16_t len, int expecting_rsp)
 {
-    char *name;
+    const char *name;
 
     if (expecting_rsp) {
         name = "write; ";
diff --git a/nimble/host/src/ble_hs.c b/nimble/host/src/ble_hs.c
index d22efe104..4198ef205 100644
--- a/nimble/host/src/ble_hs.c
+++ b/nimble/host/src/ble_hs.c
@@ -718,8 +718,7 @@ ble_hs_tx_data(struct os_mbuf *om)
     ble_monitor_send_om(BLE_MONITOR_OPCODE_ACL_TX_PKT, om);
 #endif
 
-    ble_hci_trans_hs_acl_tx(om);
-    return 0;
+    return ble_hci_trans_hs_acl_tx(om);
 }
 
 void
diff --git a/porting/nimble/include/mem/mem.h b/porting/nimble/include/mem/mem.h
index a97e148fa..13a325b5a 100644
--- a/porting/nimble/include/mem/mem.h
+++ b/porting/nimble/include/mem/mem.h
@@ -42,7 +42,7 @@ int mem_malloc_mbufpkt_pool(struct os_mempool *mempool,
                             void **out_buf);
 int mem_init_mbuf_pool(void *mem, struct os_mempool *mempool,
                        struct os_mbuf_pool *mbuf_pool, int num_blocks,
-                       int block_size, char *name);
+                       int block_size, const char *name);
 
 /**
  * Specifies a function used as a callback.  Functions of this type allocate an
diff --git a/porting/nimble/include/os/os_mempool.h b/porting/nimble/include/os/os_mempool.h
index 536cc5af6..251858742 100644
--- a/porting/nimble/include/os/os_mempool.h
+++ b/porting/nimble/include/os/os_mempool.h
@@ -70,7 +70,7 @@ struct os_mempool {
     STAILQ_ENTRY(os_mempool) mp_list;
     SLIST_HEAD(,os_memblock);
     /** Name for memory block */
-    char *name;
+    const char *name;
 };
 
 /**
@@ -171,7 +171,7 @@ typedef uint64_t os_membuf_t;
  * @return os_error_t
  */
 os_error_t os_mempool_init(struct os_mempool *mp, uint16_t blocks,
-                           uint32_t block_size, void *membuf, char *name);
+                           uint32_t block_size, void *membuf, const char *name);
 
 /**
  * Initializes an extended memory pool.  Extended attributes (e.g., callbacks)
@@ -187,7 +187,7 @@ os_error_t os_mempool_init(struct os_mempool *mp, uint16_t blocks,
  * @return os_error_t
  */
 os_error_t os_mempool_ext_init(struct os_mempool_ext *mpe, uint16_t blocks,
-                               uint32_t block_size, void *membuf, char *name);
+                               uint32_t block_size, void *membuf, const char *name);
 
 /**
  * Clears a memory pool.
diff --git a/porting/nimble/include/stats/stats.h b/porting/nimble/include/stats/stats.h
index 996bcbc72..2669ebe28 100644
--- a/porting/nimble/include/stats/stats.h
+++ b/porting/nimble/include/stats/stats.h
@@ -67,7 +67,7 @@ stats_register(void *a, void *b)
 }
 
 static inline int
-stats_init_and_reg(void *a, uint8_t b, uint8_t c, void *d, uint8_t e, void *f)
+stats_init_and_reg(void *a, uint8_t b, uint8_t c, void *d, uint8_t e, const char *f)
 {
     /* dummy */
     return 0;
diff --git a/porting/nimble/src/mem.c b/porting/nimble/src/mem.c
index 1fea7df4b..13659c9cf 100644
--- a/porting/nimble/src/mem.c
+++ b/porting/nimble/src/mem.c
@@ -206,7 +206,7 @@ mem_malloc_mbufpkt_pool(struct os_mempool *mempool,
 int
 mem_init_mbuf_pool(void *mem, struct os_mempool *mempool,
                    struct os_mbuf_pool *mbuf_pool, int num_blocks,
-                   int block_size, char *name)
+                   int block_size, const char *name)
 {
     int rc;
 
diff --git a/porting/nimble/src/os_mempool.c b/porting/nimble/src/os_mempool.c
index a02fd6e6b..f4c712ff1 100644
--- a/porting/nimble/src/os_mempool.c
+++ b/porting/nimble/src/os_mempool.c
@@ -63,7 +63,7 @@ os_mempool_poison_check(void *start, int sz)
 
 os_error_t
 os_mempool_init(struct os_mempool *mp, uint16_t blocks, uint32_t block_size,
-                void *membuf, char *name)
+                void *membuf, const char *name)
 {
     int true_block_size;
     uint8_t *block_addr;
@@ -120,7 +120,7 @@ os_mempool_init(struct os_mempool *mp, uint16_t blocks, uint32_t block_size,
 
 os_error_t
 os_mempool_ext_init(struct os_mempool_ext *mpe, uint16_t blocks,
-                    uint32_t block_size, void *membuf, char *name)
+                    uint32_t block_size, void *membuf, const char *name)
 {
     int rc;
 
diff --git a/porting/nimble/src/os_msys_init.c b/porting/nimble/src/os_msys_init.c
index 4d42d184a..02c202623 100644
--- a/porting/nimble/src/os_msys_init.c
+++ b/porting/nimble/src/os_msys_init.c
@@ -46,7 +46,7 @@ static struct os_mempool os_msys_init_2_mempool;
 static void
 os_msys_init_once(void *data, struct os_mempool *mempool,
                   struct os_mbuf_pool *mbuf_pool,
-                  int block_count, int block_size, char *name)
+                  int block_count, int block_size, const char *name)
 {
     int rc;