dma-debug: simplify logic in driver_filter()

This patch makes the driver_filter function more readable by
reorganizing the code. The removal of a code code block to an upper
indentation level makes hard-to-read line-wraps unnecessary.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

1 files changed, 21 insertions, 21 deletions

diff --git a/lib/dma-debug.c b/lib/dma-debug.c
index 27b369da52c0..ad65fc0317d9 100644
--- a/lib/dma-debug.c
+++ b/lib/dma-debug.c
@@ -147,6 +147,10 @@ static inline void dump_entry_trace(struct dma_debug_entry *entry)
 
 static bool driver_filter(struct device *dev)
 {
+        struct device_driver *drv;
+        unsigned long flags;
+        bool ret;
+
         /* driver filter off */
         if (likely(!current_driver_name[0]))
                 return true;
@@ -155,32 +159,28 @@ static bool driver_filter(struct device *dev)
         if (current_driver && dev->driver == current_driver)
                 return true;
 
-        /* driver filter on but not yet initialized */
-        if (!current_driver && current_driver_name[0]) {
-                struct device_driver *drv = get_driver(dev->driver);
-                unsigned long flags;
-                bool ret = false;
-
-                if (!drv)
-                        return false;
-
-                /* lock to protect against change of current_driver_name */
-                read_lock_irqsave(&driver_name_lock, flags);
+        if (current_driver || !current_driver_name[0])
+                return false;
 
-                if (drv->name &&
-                    strncmp(current_driver_name, drv->name,
-                            NAME_MAX_LEN-1) == 0) {
-                        current_driver = drv;
-                        ret = true;
-                }
+        /* driver filter on but not yet initialized */
+        drv = get_driver(dev->driver);
+        if (!drv)
+                return false;
 
-                read_unlock_irqrestore(&driver_name_lock, flags);
-                put_driver(drv);
+        /* lock to protect against change of current_driver_name */
+        read_lock_irqsave(&driver_name_lock, flags);
 
-                return ret;
+        ret = false;
+        if (drv->name &&
+            strncmp(current_driver_name, drv->name, NAME_MAX_LEN - 1) == 0) {
+                current_driver = drv;
+                ret = true;
         }
 
-        return false;
+        read_unlock_irqrestore(&driver_name_lock, flags);
+        put_driver(drv);
+
+        return ret;
 }
 
 #define err_printk(dev, entry, format, arg...) do {             \