be2net: use mutex instead of spin lock for mbox_lock

Since the mbox polling uses the schedule_timeout, the mbox_lock should be
a mutex and not a spin lock.
The commit f25b03a replaced udelay() with schedule_timeout() but didn't
change mbox_lock to semaphore or mutex.

Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 47 insertions, 32 deletions

diff --git a/drivers/net/benet/be.h b/drivers/net/benet/be.h
index 4594a28b1f66..d64313b7090e 100644
--- a/drivers/net/benet/be.h
+++ b/drivers/net/benet/be.h
@@ -234,7 +234,7 @@ struct be_adapter {
         u8 __iomem *db;         /* Door Bell */
         u8 __iomem *pcicfg;     /* PCI config space */
 
-        spinlock_t mbox_lock;   /* For serializing mbox cmds to BE card */
+        struct mutex mbox_lock; /* For serializing mbox cmds to BE card */
         struct be_dma_mem mbox_mem;
         /* Mbox mem is adjusted to align to 16 bytes. The allocated addr
          * is stored for freeing purpose */
diff --git a/drivers/net/benet/be_cmds.c b/drivers/net/benet/be_cmds.c
index e4465d222a7d..1c8c79c9d214 100644
--- a/drivers/net/benet/be_cmds.c
+++ b/drivers/net/benet/be_cmds.c
@@ -462,7 +462,8 @@ int be_cmd_fw_init(struct be_adapter *adapter)
         u8 *wrb;
         int status;
 
-        spin_lock(&adapter->mbox_lock);
+        if (mutex_lock_interruptible(&adapter->mbox_lock))
+                return -1;
 
         wrb = (u8 *)wrb_from_mbox(adapter);
         *wrb++ = 0xFF;
@@ -476,7 +477,7 @@ int be_cmd_fw_init(struct be_adapter *adapter)
 
         status = be_mbox_notify_wait(adapter);
 
-        spin_unlock(&adapter->mbox_lock);
+        mutex_unlock(&adapter->mbox_lock);
         return status;
 }
 
@@ -491,7 +492,8 @@ int be_cmd_fw_clean(struct be_adapter *adapter)
         if (adapter->eeh_err)
                 return -EIO;
 
-        spin_lock(&adapter->mbox_lock);
+        if (mutex_lock_interruptible(&adapter->mbox_lock))
+                return -1;
 
         wrb = (u8 *)wrb_from_mbox(adapter);
         *wrb++ = 0xFF;
@@ -505,7 +507,7 @@ int be_cmd_fw_clean(struct be_adapter *adapter)
 
         status = be_mbox_notify_wait(adapter);
 
-        spin_unlock(&adapter->mbox_lock);
+        mutex_unlock(&adapter->mbox_lock);
         return status;
 }
 int be_cmd_eq_create(struct be_adapter *adapter,
@@ -516,7 +518,8 @@ int be_cmd_eq_create(struct be_adapter *adapter,
         struct be_dma_mem *q_mem = &eq->dma_mem;
         int status;
 
-        spin_lock(&adapter->mbox_lock);
+        if (mutex_lock_interruptible(&adapter->mbox_lock))
+                return -1;
 
         wrb = wrb_from_mbox(adapter);
         req = embedded_payload(wrb);
@@ -546,7 +549,7 @@ int be_cmd_eq_create(struct be_adapter *adapter,
                 eq->created = true;
         }
 
-        spin_unlock(&adapter->mbox_lock);
+        mutex_unlock(&adapter->mbox_lock);
         return status;
 }
 
@@ -558,7 +561,8 @@ int be_cmd_mac_addr_query(struct be_adapter *adapter, u8 *mac_addr,
         struct be_cmd_req_mac_query *req;
         int status;
 
-        spin_lock(&adapter->mbox_lock);
+        if (mutex_lock_interruptible(&adapter->mbox_lock))
+                return -1;
 
         wrb = wrb_from_mbox(adapter);
         req = embedded_payload(wrb);
@@ -583,7 +587,7 @@ int be_cmd_mac_addr_query(struct be_adapter *adapter, u8 *mac_addr,
                 memcpy(mac_addr, resp->mac.addr, ETH_ALEN);
         }
 
-        spin_unlock(&adapter->mbox_lock);
+        mutex_unlock(&adapter->mbox_lock);
         return status;
 }
 
@@ -667,7 +671,8 @@ int be_cmd_cq_create(struct be_adapter *adapter,
         void *ctxt;
         int status;
 
-        spin_lock(&adapter->mbox_lock);
+        if (mutex_lock_interruptible(&adapter->mbox_lock))
+                return -1;
 
         wrb = wrb_from_mbox(adapter);
         req = embedded_payload(wrb);
@@ -701,7 +706,7 @@ int be_cmd_cq_create(struct be_adapter *adapter,
                 cq->created = true;
         }
 
-        spin_unlock(&adapter->mbox_lock);
+        mutex_unlock(&adapter->mbox_lock);
 
         return status;
 }
@@ -724,7 +729,8 @@ int be_cmd_mccq_create(struct be_adapter *adapter,
         void *ctxt;
         int status;
 
-        spin_lock(&adapter->mbox_lock);
+        if (mutex_lock_interruptible(&adapter->mbox_lock))
+                return -1;
 
         wrb = wrb_from_mbox(adapter);
         req = embedded_payload(wrb);
@@ -754,7 +760,7 @@ int be_cmd_mccq_create(struct be_adapter *adapter,
                 mccq->id = le16_to_cpu(resp->id);
                 mccq->created = true;
         }
-        spin_unlock(&adapter->mbox_lock);
+        mutex_unlock(&adapter->mbox_lock);
 
         return status;
 }
@@ -769,7 +775,8 @@ int be_cmd_txq_create(struct be_adapter *adapter,
         void *ctxt;
         int status;
 
-        spin_lock(&adapter->mbox_lock);
+        if (mutex_lock_interruptible(&adapter->mbox_lock))
+                return -1;
 
         wrb = wrb_from_mbox(adapter);
         req = embedded_payload(wrb);
@@ -801,7 +808,7 @@ int be_cmd_txq_create(struct be_adapter *adapter,
                 txq->created = true;
         }
 
-        spin_unlock(&adapter->mbox_lock);
+        mutex_unlock(&adapter->mbox_lock);
 
         return status;
 }
@@ -816,7 +823,8 @@ int be_cmd_rxq_create(struct be_adapter *adapter,
         struct be_dma_mem *q_mem = &rxq->dma_mem;
         int status;
 
-        spin_lock(&adapter->mbox_lock);
+        if (mutex_lock_interruptible(&adapter->mbox_lock))
+                return -1;
 
         wrb = wrb_from_mbox(adapter);
         req = embedded_payload(wrb);
@@ -843,7 +851,7 @@ int be_cmd_rxq_create(struct be_adapter *adapter,
                 *rss_id = resp->rss_id;
         }
 
-        spin_unlock(&adapter->mbox_lock);
+        mutex_unlock(&adapter->mbox_lock);
 
         return status;
 }
@@ -862,7 +870,8 @@ int be_cmd_q_destroy(struct be_adapter *adapter, struct be_queue_info *q,
         if (adapter->eeh_err)
                 return -EIO;
 
-        spin_lock(&adapter->mbox_lock);
+        if (mutex_lock_interruptible(&adapter->mbox_lock))
+                return -1;
 
         wrb = wrb_from_mbox(adapter);
         req = embedded_payload(wrb);
@@ -899,7 +908,7 @@ int be_cmd_q_destroy(struct be_adapter *adapter, struct be_queue_info *q,
 
         status = be_mbox_notify_wait(adapter);
 
-        spin_unlock(&adapter->mbox_lock);
+        mutex_unlock(&adapter->mbox_lock);
 
         return status;
 }
@@ -915,7 +924,8 @@ int be_cmd_if_create(struct be_adapter *adapter, u32 cap_flags, u32 en_flags,
         struct be_cmd_req_if_create *req;
         int status;
 
-        spin_lock(&adapter->mbox_lock);
+        if (mutex_lock_interruptible(&adapter->mbox_lock))
+                return -1;
 
         wrb = wrb_from_mbox(adapter);
         req = embedded_payload(wrb);
@@ -941,7 +951,7 @@ int be_cmd_if_create(struct be_adapter *adapter, u32 cap_flags, u32 en_flags,
                         *pmac_id = le32_to_cpu(resp->pmac_id);
         }
 
-        spin_unlock(&adapter->mbox_lock);
+        mutex_unlock(&adapter->mbox_lock);
         return status;
 }
 
@@ -955,7 +965,8 @@ int be_cmd_if_destroy(struct be_adapter *adapter, u32 interface_id)
         if (adapter->eeh_err)
                 return -EIO;
 
-        spin_lock(&adapter->mbox_lock);
+        if (mutex_lock_interruptible(&adapter->mbox_lock))
+                return -1;
 
         wrb = wrb_from_mbox(adapter);
         req = embedded_payload(wrb);
@@ -970,7 +981,7 @@ int be_cmd_if_destroy(struct be_adapter *adapter, u32 interface_id)
 
         status = be_mbox_notify_wait(adapter);
 
-        spin_unlock(&adapter->mbox_lock);
+        mutex_unlock(&adapter->mbox_lock);
 
         return status;
 }
@@ -1060,7 +1071,8 @@ int be_cmd_get_fw_ver(struct be_adapter *adapter, char *fw_ver)
         struct be_cmd_req_get_fw_version *req;
         int status;
 
-        spin_lock(&adapter->mbox_lock);
+        if (mutex_lock_interruptible(&adapter->mbox_lock))
+                return -1;
 
         wrb = wrb_from_mbox(adapter);
         req = embedded_payload(wrb);
@@ -1077,7 +1089,7 @@ int be_cmd_get_fw_ver(struct be_adapter *adapter, char *fw_ver)
                 strncpy(fw_ver, resp->firmware_version_string, FW_VER_LEN);
         }
 
-        spin_unlock(&adapter->mbox_lock);
+        mutex_unlock(&adapter->mbox_lock);
         return status;
 }
 
@@ -1322,7 +1334,8 @@ int be_cmd_query_fw_cfg(struct be_adapter *adapter, u32 *port_num,
         struct be_cmd_req_query_fw_cfg *req;
         int status;
 
-        spin_lock(&adapter->mbox_lock);
+        if (mutex_lock_interruptible(&adapter->mbox_lock))
+                return -1;
 
         wrb = wrb_from_mbox(adapter);
         req = embedded_payload(wrb);
@@ -1341,7 +1354,7 @@ int be_cmd_query_fw_cfg(struct be_adapter *adapter, u32 *port_num,
                 *caps = le32_to_cpu(resp->function_caps);
         }
 
-        spin_unlock(&adapter->mbox_lock);
+        mutex_unlock(&adapter->mbox_lock);
         return status;
 }
 
@@ -1352,7 +1365,8 @@ int be_cmd_reset_function(struct be_adapter *adapter)
         struct be_cmd_req_hdr *req;
         int status;
 
-        spin_lock(&adapter->mbox_lock);
+        if (mutex_lock_interruptible(&adapter->mbox_lock))
+                return -1;
 
         wrb = wrb_from_mbox(adapter);
         req = embedded_payload(wrb);
@@ -1365,7 +1379,7 @@ int be_cmd_reset_function(struct be_adapter *adapter)
 
         status = be_mbox_notify_wait(adapter);
 
-        spin_unlock(&adapter->mbox_lock);
+        mutex_unlock(&adapter->mbox_lock);
         return status;
 }
 
@@ -1376,7 +1390,8 @@ int be_cmd_rss_config(struct be_adapter *adapter, u8 *rsstable, u16 table_size)
         u32 myhash[10];
         int status;
 
-        spin_lock(&adapter->mbox_lock);
+        if (mutex_lock_interruptible(&adapter->mbox_lock))
+                return -1;
 
         wrb = wrb_from_mbox(adapter);
         req = embedded_payload(wrb);
@@ -1396,7 +1411,7 @@ int be_cmd_rss_config(struct be_adapter *adapter, u8 *rsstable, u16 table_size)
 
         status = be_mbox_notify_wait(adapter);
 
-        spin_unlock(&adapter->mbox_lock);
+        mutex_unlock(&adapter->mbox_lock);
         return status;
 }
 
diff --git a/drivers/net/benet/be_main.c b/drivers/net/benet/be_main.c
index 93354eee2cfd..fd251b59b7f9 100644
--- a/drivers/net/benet/be_main.c
+++ b/drivers/net/benet/be_main.c
@@ -2677,7 +2677,7 @@ static int be_ctrl_init(struct be_adapter *adapter)
         }
         memset(mc_cmd_mem->va, 0, mc_cmd_mem->size);
 
-        spin_lock_init(&adapter->mbox_lock);
+        mutex_init(&adapter->mbox_lock);
         spin_lock_init(&adapter->mcc_lock);
         spin_lock_init(&adapter->mcc_cq_lock);