[2/6] roms: minor fixes and cleanups.

diff --git a/hw/loader.c b/hw/loader.c
index 3aba47c..38ee2da 100644
--- a/hw/loader.c
+++ b/hw/loader.c
@@ -556,7 +556,7 @@  static void rom_insert(Rom *rom)
     QTAILQ_INSERT_TAIL(&roms, rom, next);
 }
 
-int rom_add_file(const char *file, const char *fw_dir, const char *fw_file,
+int rom_add_file(const char *file, const char *fw_dir,
                  target_phys_addr_t addr)
 {
     Rom *rom;
@@ -576,8 +576,10 @@  int rom_add_file(const char *file, const char *fw_dir, const char *fw_file,
         goto err;
     }
 
-    rom->fw_dir  = fw_dir  ? qemu_strdup(fw_dir)  : NULL;
-    rom->fw_file = fw_file ? qemu_strdup(fw_file) : NULL;
+    if (fw_dir) {
+        rom->fw_dir  = qemu_strdup(fw_dir);
+        rom->fw_file = qemu_strdup(file);
+    }
     rom->addr    = addr;
     rom->romsize = lseek(fd, 0, SEEK_END);
     rom->data    = qemu_mallocz(rom->romsize);
@@ -621,14 +623,14 @@  int rom_add_vga(const char *file)
 {
     if (!rom_enable_driver_roms)
         return 0;
-    return rom_add_file(file, "vgaroms", file, 0);
+    return rom_add_file(file, "vgaroms", 0);
 }
 
 int rom_add_option(const char *file)
 {
     if (!rom_enable_driver_roms)
         return 0;
-    return rom_add_file(file, "genroms", file, 0);
+    return rom_add_file(file, "genroms", 0);
 }
 
 static void rom_reset(void *unused)
@@ -639,8 +641,9 @@  static void rom_reset(void *unused)
         if (rom->fw_file) {
             continue;
         }
-        if (rom->data == NULL)
+        if (rom->data == NULL) {
             continue;
+        }
         cpu_physical_memory_write_rom(rom->addr, rom->data, rom->romsize);
         if (rom->isrom) {
             /* rom needs to be written only once */
@@ -683,8 +686,9 @@  int rom_load_fw(void *fw_cfg)
     Rom *rom;
 
     QTAILQ_FOREACH(rom, &roms, next) {
-        if (!rom->fw_file)
+        if (!rom->fw_file) {
             continue;
+        }
         fw_cfg_add_file(fw_cfg, rom->fw_dir, rom->fw_file, rom->data, rom->romsize);
     }
     return 0;
@@ -698,10 +702,12 @@  static Rom *find_rom(target_phys_addr_t addr)
         if (rom->fw_file) {
             continue;
         }
-        if (rom->addr > addr)
+        if (rom->addr > addr) {
             continue;
-        if (rom->addr + rom->romsize < addr)
+        }
+        if (rom->addr + rom->romsize < addr) {
             continue;
+        }
         return rom;
     }
     return NULL;
@@ -723,12 +729,15 @@  int rom_copy(uint8_t *dest, target_phys_addr_t addr, size_t size)
         if (rom->fw_file) {
             continue;
         }
-        if (rom->addr + rom->romsize < addr)
+        if (rom->addr + rom->romsize < addr) {
             continue;
-        if (rom->addr > end)
+        }
+        if (rom->addr > end) {
             break;
-        if (!rom->data)
+        }
+        if (!rom->data) {
             continue;
+        }
 
         d = dest + (rom->addr - addr);
         s = rom->data;
@@ -771,10 +780,9 @@  void do_info_roms(Monitor *mon)
                            rom->isrom ? "rom" : "ram",
                            rom->name);
         } else {
-            monitor_printf(mon, "fw=%s%s%s"
+            monitor_printf(mon, "fw=%s/%s"
                            " size=0x%06zx name=\"%s\" \n",
-                           rom->fw_dir ? rom->fw_dir : "",
-                           rom->fw_dir ? "/" : "",
+                           rom->fw_dir,
                            rom->fw_file,
                            rom->romsize,
                            rom->name);
diff --git a/hw/loader.h b/hw/loader.h
index 77beb0e..698160b 100644
--- a/hw/loader.h
+++ b/hw/loader.h
@@ -19,7 +19,8 @@  void pstrcpy_targphys(const char *name,
                       target_phys_addr_t dest, int buf_size,
                       const char *source);
 
-int rom_add_file(const char *file, const char *fw_dir, const char *fw_file,
+
+int rom_add_file(const char *file, const char *fw_dir,
                  target_phys_addr_t addr);
 int rom_add_blob(const char *name, const void *blob, size_t len,
                  target_phys_addr_t addr);
@@ -30,7 +31,7 @@  void *rom_ptr(target_phys_addr_t addr);
 void do_info_roms(Monitor *mon);
 
 #define rom_add_file_fixed(_f, _a)              \
-    rom_add_file(_f, NULL, NULL, _a)
+    rom_add_file(_f, NULL, _a)
 #define rom_add_blob_fixed(_f, _b, _l, _a)      \
     rom_add_blob(_f, _b, _l, _a)