bcm4329: expose firmware_path to userland, backported from bcmdhd

gistfile1.diff

diff --git a/drivers/net/wireless/bcm4329/dhd_linux.c b/drivers/net/wireless/bcm4329/dhd_linux.c
index 90cc929..1c82a96 100644
--- a/drivers/net/wireless/bcm4329/dhd_linux.c
+++ b/drivers/net/wireless/bcm4329/dhd_linux.c
@@ -319,7 +319,7 @@ struct semaphore dhd_registration_sem;
 #define DHD_REGISTRATION_TIMEOUT  12000  /* msec : allowed time to finished dhd registration */
 #endif /* (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27)) */
 /* load firmware and/or nvram values from the filesystem */
-module_param_string(firmware_path, firmware_path, MOD_PARAM_PATHLEN, 0);
+module_param_string(firmware_path, firmware_path, MOD_PARAM_PATHLEN, 0660);
 module_param_string(nvram_path, nvram_path, MOD_PARAM_PATHLEN, 0);

 /* Error bits */
@@ -1904,6 +1904,15 @@ dhd_open(struct net_device *net)
        uint32 toe_ol;
 #endif
        int ifidx;
+       int32 ret = 0;
+       dhd_os_wake_lock(&dhd->pub);
+       /* Update FW path if it was changed */
+       if ((firmware_path != NULL) && (firmware_path[0] != '\0')) {
+               if (firmware_path[strlen(firmware_path)-1] == '\n')
+                       firmware_path[strlen(firmware_path)-1] = '\0';
+               strcpy(fw_path, firmware_path);
+               firmware_path[0] = '\0';
+       }

        /*  Force start if ifconfig_up gets called before START command */
        wl_control_wl_start(net);
@@ -1913,7 +1922,8 @@ dhd_open(struct net_device *net)

        if ((dhd->iflist[ifidx]) && (dhd->iflist[ifidx]->state == WLC_E_IF_DEL)) {
                DHD_ERROR(("%s: Error: called when IF already deleted\n", __FUNCTION__));
-               return -1;
+               ret = -1;
+               goto exit;
        }

        if (ifidx == 0) { /* do it only for primary eth0 */
@@ -1935,7 +1945,9 @@ dhd_open(struct net_device *net)
        dhd->pub.up = 1;

        OLD_MOD_INC_USE_COUNT;
-       return 0;
+exit:
+       dhd_os_wake_unlock(&dhd->pub);
+       return ret;
 }

 osl_t *