wl1271: Generalize command response reading

Responses to firmware commands are read in by the command transmission
function, as part of command flow. Previously responses were read in
multiple places.

Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Reviewed-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 27 insertions, 40 deletions

diff --git a/drivers/net/wireless/wl12xx/wl1271_cmd.c b/drivers/net/wireless/wl12xx/wl1271_cmd.c
index 8acee5cf0e61..990eb01b4c71 100644
--- a/drivers/net/wireless/wl12xx/wl1271_cmd.c
+++ b/drivers/net/wireless/wl12xx/wl1271_cmd.c
@@ -42,7 +42,8 @@
  * @buf: buffer containing the command, must work with dma
  * @len: length of the buffer
  */
-int wl1271_cmd_send(struct wl1271 *wl, u16 id, void *buf, size_t len)
+int wl1271_cmd_send(struct wl1271 *wl, u16 id, void *buf, size_t len,
+                    size_t res_len)
 {
         struct wl1271_cmd_header *cmd;
         unsigned long timeout;
@@ -76,8 +77,9 @@ int wl1271_cmd_send(struct wl1271 *wl, u16 id, void *buf, size_t len)
         }
 
         /* read back the status code of the command */
-        wl1271_spi_read(wl, wl->cmd_box_addr, cmd,
-                        sizeof(struct wl1271_cmd_header), false);
+        if (res_len == 0)
+                res_len = sizeof(struct wl1271_cmd_header);
+        wl1271_spi_read(wl, wl->cmd_box_addr, cmd, res_len, false);
 
         status = le16_to_cpu(cmd->status);
         if (status != CMD_STATUS_SUCCESS) {
@@ -273,7 +275,7 @@ int wl1271_cmd_join(struct wl1271 *wl)
         wl->tx_security_seq_16 = 0;
         wl->tx_security_seq_32 = 0;
 
-        ret = wl1271_cmd_send(wl, CMD_START_JOIN, join, sizeof(*join));
+        ret = wl1271_cmd_send(wl, CMD_START_JOIN, join, sizeof(*join), 0);
         if (ret < 0) {
                 wl1271_error("failed to initiate cmd join");
                 goto out_free;
@@ -305,30 +307,21 @@ out:
 int wl1271_cmd_test(struct wl1271 *wl, void *buf, size_t buf_len, u8 answer)
 {
         int ret;
+        size_t res_len = 0;
 
         wl1271_debug(DEBUG_CMD, "cmd test");
 
-        ret = wl1271_cmd_send(wl, CMD_TEST, buf, buf_len);
+        if (answer)
+                res_len = buf_len;
+
+        ret = wl1271_cmd_send(wl, CMD_TEST, buf, buf_len, res_len);
 
         if (ret < 0) {
                 wl1271_warning("TEST command failed");
                 return ret;
         }
 
-        if (answer) {
-                struct wl1271_command *cmd_answer;
-
-                /*
-                 * The test command got in, we can read the answer.
-                 * The answer would be a wl1271_command, where the
-                 * parameter array contains the actual answer.
-                 */
-                wl1271_spi_read(wl, wl->cmd_box_addr, buf, buf_len, false);
-
-                cmd_answer = buf;
-        }
-
-        return 0;
+        return ret;
 }
 
 /**
@@ -351,16 +344,10 @@ int wl1271_cmd_interrogate(struct wl1271 *wl, u16 id, void *buf, size_t len)
         /* payload length, does not include any headers */
         acx->len = cpu_to_le16(len - sizeof(*acx));
 
-        ret = wl1271_cmd_send(wl, CMD_INTERROGATE, acx, sizeof(*acx));
-        if (ret < 0) {
+        ret = wl1271_cmd_send(wl, CMD_INTERROGATE, acx, sizeof(*acx), len);
+        if (ret < 0)
                 wl1271_error("INTERROGATE command failed");
-                goto out;
-        }
-
-        /* the interrogate command got in, we can read the answer */
-        wl1271_spi_read(wl, wl->cmd_box_addr, buf, len, false);
 
-out:
         return ret;
 }
 
@@ -384,7 +371,7 @@ int wl1271_cmd_configure(struct wl1271 *wl, u16 id, void *buf, size_t len)
         /* payload length, does not include any headers */
         acx->len = cpu_to_le16(len - sizeof(*acx));
 
-        ret = wl1271_cmd_send(wl, CMD_CONFIGURE, acx, len);
+        ret = wl1271_cmd_send(wl, CMD_CONFIGURE, acx, len, 0);
         if (ret < 0) {
                 wl1271_warning("CONFIGURE command NOK");
                 return ret;
@@ -417,7 +404,7 @@ int wl1271_cmd_data_path(struct wl1271 *wl, u8 channel, bool enable)
                 cmd_tx = CMD_DISABLE_TX;
         }
 
-        ret = wl1271_cmd_send(wl, cmd_rx, cmd, sizeof(*cmd));
+        ret = wl1271_cmd_send(wl, cmd_rx, cmd, sizeof(*cmd), 0);
         if (ret < 0) {
                 wl1271_error("rx %s cmd for channel %d failed",
                              enable ? "start" : "stop", channel);
@@ -427,7 +414,7 @@ int wl1271_cmd_data_path(struct wl1271 *wl, u8 channel, bool enable)
         wl1271_debug(DEBUG_BOOT, "rx %s cmd channel %d",
                      enable ? "start" : "stop", channel);
 
-        ret = wl1271_cmd_send(wl, cmd_tx, cmd, sizeof(*cmd));
+        ret = wl1271_cmd_send(wl, cmd_tx, cmd, sizeof(*cmd), 0);
         if (ret < 0) {
                 wl1271_error("tx %s cmd for channel %d failed",
                              enable ? "start" : "stop", channel);
@@ -469,7 +456,7 @@ int wl1271_cmd_ps_mode(struct wl1271 *wl, u8 ps_mode)
         ps_params->null_data_rate = cpu_to_le32(1); /* 1 Mbps */
 
         ret = wl1271_cmd_send(wl, CMD_SET_PS_MODE, ps_params,
-                              sizeof(*ps_params));
+                              sizeof(*ps_params), 0);
         if (ret < 0) {
                 wl1271_error("cmd set_ps_mode failed");
                 goto out;
@@ -500,14 +487,14 @@ int wl1271_cmd_read_memory(struct wl1271 *wl, u32 addr, void *answer,
         cmd->addr = cpu_to_le32(addr);
         cmd->size = cpu_to_le32(len);
 
-        ret = wl1271_cmd_send(wl, CMD_READ_MEMORY, cmd, sizeof(*cmd));
+        ret = wl1271_cmd_send(wl, CMD_READ_MEMORY, cmd, sizeof(*cmd),
+                              sizeof(*cmd));
         if (ret < 0) {
                 wl1271_error("read memory command failed: %d", ret);
                 goto out;
         }
 
-        /* the read command got in, we can now read the answer */
-        wl1271_spi_read(wl, wl->cmd_box_addr, cmd, sizeof(*cmd), false);
+        /* the read command got in */
         memcpy(answer, cmd->value, len);
 
 out:
@@ -609,7 +596,7 @@ int wl1271_cmd_scan(struct wl1271 *wl, u8 *ssid, size_t len,
         trigger->timeout = 0;
 
         ret = wl1271_cmd_send(wl, CMD_TRIGGER_SCAN_TO, trigger,
-                              sizeof(*trigger));
+                              sizeof(*trigger), 0);
         if (ret < 0) {
                 wl1271_error("trigger scan to failed for hw scan");
                 goto out;
@@ -632,7 +619,7 @@ int wl1271_cmd_scan(struct wl1271 *wl, u8 *ssid, size_t len,
                 }
         }
 
-        ret = wl1271_cmd_send(wl, CMD_SCAN, params, sizeof(*params));
+        ret = wl1271_cmd_send(wl, CMD_SCAN, params, sizeof(*params), 0);
         if (ret < 0) {
                 wl1271_error("SCAN failed");
                 wl->scanning = false;
@@ -670,7 +657,7 @@ int wl1271_cmd_template_set(struct wl1271 *wl, u16 template_id,
         if (buf)
                 memcpy(cmd->template_data, buf, buf_len);
 
-        ret = wl1271_cmd_send(wl, CMD_SET_TEMPLATE, cmd, sizeof(*cmd));
+        ret = wl1271_cmd_send(wl, CMD_SET_TEMPLATE, cmd, sizeof(*cmd), 0);
         if (ret < 0) {
                 wl1271_warning("cmd set_template failed: %d", ret);
                 goto out_free;
@@ -849,7 +836,7 @@ int wl1271_cmd_set_default_wep_key(struct wl1271 *wl, u8 id)
         cmd->key_action = cpu_to_le16(KEY_SET_ID);
         cmd->key_type = KEY_WEP;
 
-        ret = wl1271_cmd_send(wl, CMD_SET_KEYS, cmd, sizeof(*cmd));
+        ret = wl1271_cmd_send(wl, CMD_SET_KEYS, cmd, sizeof(*cmd), 0);
         if (ret < 0) {
                 wl1271_warning("cmd set_default_wep_key failed: %d", ret);
                 goto out;
@@ -906,7 +893,7 @@ int wl1271_cmd_set_key(struct wl1271 *wl, u16 action, u8 id, u8 key_type,
 
         wl1271_dump(DEBUG_CRYPT, "TARGET KEY: ", cmd, sizeof(*cmd));
 
-        ret = wl1271_cmd_send(wl, CMD_SET_KEYS, cmd, sizeof(*cmd));
+        ret = wl1271_cmd_send(wl, CMD_SET_KEYS, cmd, sizeof(*cmd), 0);
         if (ret < 0) {
                 wl1271_warning("could not set keys");
                 goto out;
@@ -936,7 +923,7 @@ int wl1271_cmd_disconnect(struct wl1271 *wl)
         /* disconnect reason is not used in immediate disconnections */
         cmd->type = DISCONNECT_IMMEDIATE;
 
-        ret = wl1271_cmd_send(wl, CMD_DISCONNECT, cmd, sizeof(*cmd));
+        ret = wl1271_cmd_send(wl, CMD_DISCONNECT, cmd, sizeof(*cmd), 0);
         if (ret < 0) {
                 wl1271_error("failed to send disconnect command");
                 goto out_free;