remove needless special case for dfu

Author: remibettan

src/linux/backend-v4l2.cpp

@@ -578,7 +578,7 @@ namespace librealsense
             }
         }
 
-        bool v4l_uvc_device::get_devname_from_video_path(const std::string& video_path, std::string& devname, bool is_for_dfu)
+        bool v4l_uvc_device::get_devname_from_video_path(const std::string& video_path, std::string& devname)
         {
             std::ifstream uevent_file(video_path + "/uevent");
             if (!uevent_file)
@@ -591,14 +591,10 @@ namespace librealsense
             {
                 if (uevent_line.find("DEVNAME=") != std::string::npos)
                 {
-                    devname = uevent_line.substr(uevent_line.find_last_of('=') + 1);
+                    devname = "/dev/" + uevent_line.substr(uevent_line.find_last_of('=') + 1);
                 }
             }
             uevent_file.close();
-            if (!is_for_dfu)
-            {
-                devname = "/dev/" + devname;
-            }
             return true;
         }
 
@@ -690,8 +686,7 @@ namespace librealsense
                         continue;
                     }
                     std::string devname;
-                    bool for_dfu = true;
-                    if (get_devname_from_video_path(real_path, devname, for_dfu))
+                    if (get_devname_from_video_path(real_path, devname))
                     {
                         if (devname.empty())
                         {
@@ -907,11 +902,10 @@ namespace librealsense
             std::vector<std::string> dfu_device_paths = get_mipi_dfu_paths();
 
             for (const auto& dfu_device_path: dfu_device_paths) {
-                auto mipi_dfu_chardev = "/dev/" + dfu_device_path;
-                int vfd = open(mipi_dfu_chardev.c_str(), O_RDONLY | O_NONBLOCK);
+                int vfd = open(dfu_device_path.c_str(), O_RDONLY | O_NONBLOCK);
                 if (vfd >= 0) {
                     // Use legacy DFU device node used in firmware_update_manager
-                    info.dfu_device_path = mipi_dfu_chardev;
+                    info.dfu_device_path = dfu_device_path;
                     ::close(vfd); // file exists, close file and continue to assign it
                     break;
                 }

src/linux/backend-v4l2.h

@@ -405,7 +405,7 @@ namespace librealsense
             virtual inline std::shared_ptr<buffer> get_video_buffer(__u32 index) const {return _buffers[index];}
             virtual inline std::shared_ptr<buffer> get_md_buffer(__u32 index) const {return nullptr;}
 
-            static bool get_devname_from_video_path(const std::string& real_path, std::string& devname, bool is_for_dfu = false);
+            static bool get_devname_from_video_path(const std::string& real_path, std::string& devname);
 
             power_state _state = D3;
             std::string _name = "";