Staging: ti-st: make use of linux err codes

remove custom error code definitions from the header and
make use of the agreed upon linux error codes.

Signed-off-by: Pavan Savoy <pavan_savoy@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

5 files changed, 47 insertions, 56 deletions

diff --git a/drivers/staging/ti-st/bt_drv.c b/drivers/staging/ti-st/bt_drv.c
index d8420b5c91f..d70aea16891 100644
--- a/drivers/staging/ti-st/bt_drv.c
+++ b/drivers/staging/ti-st/bt_drv.c
@@ -191,7 +191,7 @@ static int hci_st_open(struct hci_dev *hdev)
 
         /* Register with ST layer */
         err = st_register(&hci_st_proto);
-        if (err == ST_ERR_PENDING) {
+        if (err == -EINPROGRESS) {
                 /* Prepare wait-for-completion handler data structures.
                  * Needed to syncronize this and st_registration_completion_cb()
                  * functions.
@@ -232,7 +232,7 @@ static int hci_st_open(struct hci_dev *hdev)
                         return -EAGAIN;
                 }
                 err = 0;
-        } else if (err == ST_ERR_FAILURE) {
+        } else if (err == -1) {
                 BT_DRV_ERR("st_register failed %d", err);
                 BTDRV_API_EXIT(-EAGAIN);
                 return -EAGAIN;
@@ -280,7 +280,7 @@ static int hci_st_close(struct hci_dev *hdev)
         /* Unregister from ST layer */
         if (test_and_clear_bit(BT_ST_REGISTERED, &hst->flags)) {
                 err = st_unregister(ST_BT);
-                if (err != ST_SUCCESS) {
+                if (err != 0) {
                         BT_DRV_ERR("st_unregister failed %d", err);
                         BTDRV_API_EXIT(-EBUSY);
                         return -EBUSY;
diff --git a/drivers/staging/ti-st/st.h b/drivers/staging/ti-st/st.h
index e6a8ffde30a..c4288aa8d2b 100644
--- a/drivers/staging/ti-st/st.h
+++ b/drivers/staging/ti-st/st.h
@@ -50,15 +50,6 @@ enum proto_type {
         ST_MAX,
 };
 
-enum {
-        ST_ERR_FAILURE = -1,    /* check struct */
-        ST_SUCCESS,
-        ST_ERR_PENDING = -5,    /* to call reg_complete_cb */
-        ST_ERR_ALREADY,         /* already registered */
-        ST_ERR_INPROGRESS,
-        ST_ERR_NOPROTO,         /* protocol not supported */
-};
-
 /* per protocol structure
  * for BT/FM and GPS
  */
diff --git a/drivers/staging/ti-st/st_core.c b/drivers/staging/ti-st/st_core.c
index bf5049c1d12..0ad8cecd5e4 100644
--- a/drivers/staging/ti-st/st_core.c
+++ b/drivers/staging/ti-st/st_core.c
@@ -87,7 +87,7 @@ int st_int_write(struct st_data_s *st_gdata,
         struct tty_struct *tty;
         if (unlikely(st_gdata == NULL || st_gdata->tty == NULL)) {
                 pr_err("tty unavailable to perform write");
-                return ST_ERR_FAILURE;
+                return -1;
         }
         tty = st_gdata->tty;
 #ifdef VERBOSE
@@ -123,7 +123,7 @@ void st_send_frame(enum proto_type protoid, struct st_data_s *st_gdata)
          */
         if (likely(st_gdata->list[protoid]->recv != NULL)) {
                 if (unlikely(st_gdata->list[protoid]->recv(st_gdata->rx_skb)
-                             != ST_SUCCESS)) {
+                             != 0)) {
                         pr_err(" proto stack %d's ->recv failed", protoid);
                         kfree_skb(st_gdata->rx_skb);
                         return;
@@ -601,7 +601,7 @@ void kim_st_list_protocols(struct st_data_s *st_gdata, char *buf)
 long st_register(struct st_proto_s *new_proto)
 {
         struct st_data_s        *st_gdata;
-        long err = ST_SUCCESS;
+        long err = 0;
         unsigned long flags = 0;
 
         st_kim_ref(&st_gdata);
@@ -609,17 +609,17 @@ long st_register(struct st_proto_s *new_proto)
         if (st_gdata == NULL || new_proto == NULL || new_proto->recv == NULL
             || new_proto->reg_complete_cb == NULL) {
                 pr_err("gdata/new_proto/recv or reg_complete_cb not ready");
-                return ST_ERR_FAILURE;
+                return -1;
         }
 
         if (new_proto->type < ST_BT || new_proto->type >= ST_MAX) {
                 pr_err("protocol %d not supported", new_proto->type);
-                return ST_ERR_NOPROTO;
+                return -EPROTONOSUPPORT;
         }
 
         if (st_gdata->list[new_proto->type] != NULL) {
                 pr_err("protocol %d already registered", new_proto->type);
-                return ST_ERR_ALREADY;
+                return -EALREADY;
         }
 
         /* can be from process context only */
@@ -636,7 +636,7 @@ long st_register(struct st_proto_s *new_proto)
 
                 set_bit(ST_REG_PENDING, &st_gdata->st_state);
                 spin_unlock_irqrestore(&st_gdata->lock, flags);
-                return ST_ERR_PENDING;
+                return -EINPROGRESS;
         } else if (st_gdata->protos_registered == ST_EMPTY) {
                 pr_info(" protocol list empty :%d ", new_proto->type);
                 set_bit(ST_REG_IN_PROGRESS, &st_gdata->st_state);
@@ -651,15 +651,15 @@ long st_register(struct st_proto_s *new_proto)
                  * since it involves BT fw download
                  */
                 err = st_kim_start(st_gdata->kim_data);
-                if (err != ST_SUCCESS) {
+                if (err != 0) {
                         clear_bit(ST_REG_IN_PROGRESS, &st_gdata->st_state);
                         if ((st_gdata->protos_registered != ST_EMPTY) &&
                             (test_bit(ST_REG_PENDING, &st_gdata->st_state))) {
                                 pr_err(" KIM failure complete callback ");
-                                st_reg_complete(st_gdata, ST_ERR_FAILURE);
+                                st_reg_complete(st_gdata, -1);
                         }
 
-                        return ST_ERR_FAILURE;
+                        return -1;
                 }
 
                 /* the protocol might require other gpios to be toggled
@@ -675,7 +675,7 @@ long st_register(struct st_proto_s *new_proto)
                 if ((st_gdata->protos_registered != ST_EMPTY) &&
                     (test_bit(ST_REG_PENDING, &st_gdata->st_state))) {
                         pr_info(" call reg complete callback ");
-                        st_reg_complete(st_gdata, ST_SUCCESS);
+                        st_reg_complete(st_gdata, 0);
                 }
                 clear_bit(ST_REG_PENDING, &st_gdata->st_state);
 
@@ -685,7 +685,7 @@ long st_register(struct st_proto_s *new_proto)
                 if (st_gdata->list[new_proto->type] != NULL) {
                         pr_err(" proto %d already registered ",
                                    new_proto->type);
-                        return ST_ERR_ALREADY;
+                        return -EALREADY;
                 }
 
                 spin_lock_irqsave(&st_gdata->lock, flags);
@@ -709,7 +709,7 @@ long st_register(struct st_proto_s *new_proto)
                 default:
                         pr_err("%d protocol not supported",
                                    new_proto->type);
-                        err = ST_ERR_NOPROTO;
+                        err = -EPROTONOSUPPORT;
                         /* something wrong */
                         break;
                 }
@@ -730,7 +730,7 @@ EXPORT_SYMBOL_GPL(st_register);
  */
 long st_unregister(enum proto_type type)
 {
-        long err = ST_SUCCESS;
+        long err = 0;
         unsigned long flags = 0;
         struct st_data_s        *st_gdata;
 
@@ -739,7 +739,7 @@ long st_unregister(enum proto_type type)
         st_kim_ref(&st_gdata);
         if (type < ST_BT || type >= ST_MAX) {
                 pr_err(" protocol %d not supported", type);
-                return ST_ERR_NOPROTO;
+                return -EPROTONOSUPPORT;
         }
 
         spin_lock_irqsave(&st_gdata->lock, flags);
@@ -747,7 +747,7 @@ long st_unregister(enum proto_type type)
         if (st_gdata->list[type] == NULL) {
                 pr_err(" protocol %d not registered", type);
                 spin_unlock_irqrestore(&st_gdata->lock, flags);
-                return ST_ERR_NOPROTO;
+                return -EPROTONOSUPPORT;
         }
 
         st_gdata->protos_registered--;
@@ -794,7 +794,7 @@ long st_write(struct sk_buff *skb)
         if (unlikely(skb == NULL || st_gdata == NULL
                 || st_gdata->tty == NULL)) {
                 pr_err("data/tty unavailable to perform write");
-                return ST_ERR_FAILURE;
+                return -1;
         }
 #ifdef DEBUG                    /* open-up skb to read the 1st byte */
         switch (skb->data[0]) {
@@ -813,7 +813,7 @@ long st_write(struct sk_buff *skb)
         if (unlikely(st_gdata->list[protoid] == NULL)) {
                 pr_err(" protocol %d not registered, and writing? ",
                            protoid);
-                return ST_ERR_FAILURE;
+                return -1;
         }
 #endif
         pr_info("%d to be written", skb->len);
@@ -837,7 +837,7 @@ EXPORT_SYMBOL_GPL(st_unregister);
  */
 static int st_tty_open(struct tty_struct *tty)
 {
-        int err = ST_SUCCESS;
+        int err = 0;
         struct st_data_s *st_gdata;
         pr_info("%s ", __func__);
 
diff --git a/drivers/staging/ti-st/st_kim.c b/drivers/staging/ti-st/st_kim.c
index d4fd2c28b82..33fc4d0a2ed 100644
--- a/drivers/staging/ti-st/st_kim.c
+++ b/drivers/staging/ti-st/st_kim.c
@@ -247,13 +247,13 @@ static long read_local_version(struct kim_data_s *kim_gdata, char *bts_scr_name)
         INIT_COMPLETION(kim_gdata->kim_rcvd);
         if (4 != st_int_write(kim_gdata->core_data, read_ver_cmd, 4)) {
                 pr_err("kim: couldn't write 4 bytes");
-                return ST_ERR_FAILURE;
+                return -1;
         }
 
         if (!wait_for_completion_timeout
             (&kim_gdata->kim_rcvd, msecs_to_jiffies(CMD_RESP_TIME))) {
                 pr_err(" waiting for ver info- timed out ");
-                return ST_ERR_FAILURE;
+                return -1;
         }
 
         version =
@@ -275,7 +275,7 @@ static long read_local_version(struct kim_data_s *kim_gdata, char *bts_scr_name)
         kim_gdata->version.min_ver = min_ver;
 
         pr_info("%s", bts_scr_name);
-        return ST_SUCCESS;
+        return 0;
 }
 
 /* internal function which parses through the .bts firmware script file
@@ -283,7 +283,7 @@ static long read_local_version(struct kim_data_s *kim_gdata, char *bts_scr_name)
  */
 static long download_firmware(struct kim_data_s *kim_gdata)
 {
-        long err = ST_SUCCESS;
+        long err = 0;
         long len = 0;
         register unsigned char *ptr = NULL;
         register unsigned char *action_ptr = NULL;
@@ -292,7 +292,7 @@ static long download_firmware(struct kim_data_s *kim_gdata)
         pr_info("%s", __func__);
 
         err = read_local_version(kim_gdata, bts_scr_name);
-        if (err != ST_SUCCESS) {
+        if (err != 0) {
                 pr_err("kim: failed to read local ver");
                 return err;
         }
@@ -303,7 +303,7 @@ static long download_firmware(struct kim_data_s *kim_gdata)
                      (kim_gdata->fw_entry->size == 0))) {
                 pr_err(" request_firmware failed(errno %ld) for %s", err,
                            bts_scr_name);
-                return ST_ERR_FAILURE;
+                return -1;
         }
         ptr = (void *)kim_gdata->fw_entry->data;
         len = kim_gdata->fw_entry->size;
@@ -338,7 +338,7 @@ static long download_firmware(struct kim_data_s *kim_gdata)
                                            ((struct bts_action *)ptr)->size);
                         if (unlikely(err < 0)) {
                                 release_firmware(kim_gdata->fw_entry);
-                                return ST_ERR_FAILURE;
+                                return -1;
                         }
                         if (!wait_for_completion_timeout
                             (&kim_gdata->kim_rcvd,
@@ -347,7 +347,7 @@ static long download_firmware(struct kim_data_s *kim_gdata)
                                     (" response timeout during fw download ");
                                 /* timed out */
                                 release_firmware(kim_gdata->fw_entry);
-                                return ST_ERR_FAILURE;
+                                return -1;
                         }
                         break;
                 case ACTION_DELAY:      /* sleep */
@@ -365,7 +365,7 @@ static long download_firmware(struct kim_data_s *kim_gdata)
         }
         /* fw download complete */
         release_firmware(kim_gdata->fw_entry);
-        return ST_SUCCESS;
+        return 0;
 }
 
 /**********************************************************************/
@@ -451,7 +451,7 @@ void st_kim_complete(void *kim_data)
 */
 long st_kim_start(void *kim_data)
 {
-        long err = ST_SUCCESS;
+        long err = 0;
         long retry = POR_RETRY_COUNT;
         struct kim_data_s       *kim_gdata = (struct kim_data_s *)kim_data;
 
@@ -475,7 +475,7 @@ long st_kim_start(void *kim_data)
                 err = kill_pid(find_get_pid(kim_gdata->uim_pid), SIGUSR2, 0);
                 if (err != 0) {
                         pr_info(" sending SIGUSR2 to uim failed %ld", err);
-                        err = ST_ERR_FAILURE;
+                        err = -1;
                         continue;
                 }
 #endif
@@ -486,13 +486,13 @@ long st_kim_start(void *kim_data)
                                 msecs_to_jiffies(LDISC_TIME));
                 if (!err) {     /* timeout */
                         pr_err("line disc installation timed out ");
-                        err = ST_ERR_FAILURE;
+                        err = -1;
                         continue;
                 } else {
                         /* ldisc installed now */
                         pr_info(" line discipline installed ");
                         err = download_firmware(kim_gdata);
-                        if (err != ST_SUCCESS) {
+                        if (err != 0) {
                                 pr_err("download firmware failed");
                                 continue;
                         } else {        /* on success don't retry */
@@ -507,7 +507,7 @@ long st_kim_start(void *kim_data)
 */
 long st_kim_stop(void *kim_data)
 {
-        long err = ST_SUCCESS;
+        long err = 0;
         struct kim_data_s       *kim_gdata = (struct kim_data_s *)kim_data;
 
         INIT_COMPLETION(kim_gdata->ldisc_installed);
@@ -516,7 +516,7 @@ long st_kim_stop(void *kim_data)
         err = kill_pid(find_get_pid(kim_gdata->uim_pid), SIGUSR2, 1);
         if (err != 0) {
                 pr_err("sending SIGUSR2 to uim failed %ld", err);
-                return ST_ERR_FAILURE;
+                return -1;
         }
 #endif
         /* set BT rfkill to be blocked */
@@ -527,7 +527,7 @@ long st_kim_stop(void *kim_data)
                         msecs_to_jiffies(LDISC_TIME));
         if (!err) {             /* timeout */
                 pr_err(" timed out waiting for ldisc to be un-installed");
-                return ST_ERR_FAILURE;
+                return -1;
         }
 
         /* By default configure BT nShutdown to LOW state */
@@ -607,7 +607,7 @@ static int kim_toggle_radio(void *data, bool blocked)
                 pr_err(" wrong proto type ");
         break;
         }
-        return ST_SUCCESS;
+        return 0;
 }
 
 void st_kim_ref(struct st_data_s **core_data)
@@ -643,7 +643,7 @@ static int kim_probe(struct platform_device *pdev)
         status = st_core_init(&kim_gdata->core_data);
         if (status != 0) {
                 pr_err(" ST core init failed");
-                return ST_ERR_FAILURE;
+                return -1;
         }
         /* refer to itself */
         kim_gdata->core_data->kim_data = kim_gdata;
@@ -716,7 +716,7 @@ static int kim_probe(struct platform_device *pdev)
                 return -1;
         }
         pr_info(" sysfs entries created ");
-        return ST_SUCCESS;
+        return 0;
 }
 
 static int kim_remove(struct platform_device *pdev)
@@ -745,7 +745,7 @@ static int kim_remove(struct platform_device *pdev)
 
         kfree(kim_gdata);
         kim_gdata = NULL;
-        return ST_SUCCESS;
+        return 0;
 }
 
 /**********************************************************************/
@@ -753,13 +753,13 @@ static int kim_remove(struct platform_device *pdev)
 
 static int __init st_kim_init(void)
 {
-        long ret = ST_SUCCESS;
+        long ret = 0;
         ret = platform_driver_register(&kim_platform_driver);
         if (ret != 0) {
                 pr_err("platform drv registration failed");
-                return ST_ERR_FAILURE;
+                return -1;
         }
-        return ST_SUCCESS;
+        return 0;
 }
 
 static void __exit st_kim_deinit(void)
diff --git a/drivers/staging/ti-st/st_ll.c b/drivers/staging/ti-st/st_ll.c
index 0685a100db6..6bc0759729f 100644
--- a/drivers/staging/ti-st/st_ll.c
+++ b/drivers/staging/ti-st/st_ll.c
@@ -127,9 +127,9 @@ unsigned long st_ll_sleep_state(struct st_data_s *st_data,
                 break;
         default:
                 pr_err(" unknown input/state ");
-                return ST_ERR_FAILURE;
+                return -1;
         }
-        return ST_SUCCESS;
+        return 0;
 }
 
 /* Called from ST CORE to initialize ST LL */