dma-debug: release free_entries_lock before saving stack trace

Saving stack trace can take a while and once the entry
is allocated free_entries_lock is no longer needed.

Signed-off-by: Jakub Kicinski <kubakici@wp.pl>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

1 files changed, 5 insertions, 5 deletions

diff --git a/lib/dma-debug.c b/lib/dma-debug.c
index 13ef2338be41..518aea714d21 100644
--- a/lib/dma-debug.c
+++ b/lib/dma-debug.c
@@ -430,7 +430,7 @@ static struct dma_debug_entry *__dma_entry_alloc(void)
  */
 static struct dma_debug_entry *dma_entry_alloc(void)
 {
-        struct dma_debug_entry *entry = NULL;
+        struct dma_debug_entry *entry;
         unsigned long flags;
 
         spin_lock_irqsave(&free_entries_lock, flags);
@@ -438,11 +438,14 @@ static struct dma_debug_entry *dma_entry_alloc(void)
         if (list_empty(&free_entries)) {
                 pr_err("DMA-API: debugging out of memory - disabling\n");
                 global_disable = true;
-                goto out;
+                spin_unlock_irqrestore(&free_entries_lock, flags);
+                return NULL;
         }
 
         entry = __dma_entry_alloc();
 
+        spin_unlock_irqrestore(&free_entries_lock, flags);
+
 #ifdef CONFIG_STACKTRACE
         entry->stacktrace.max_entries = DMA_DEBUG_STACKTRACE_ENTRIES;
         entry->stacktrace.entries = entry->st_entries;
@@ -450,9 +453,6 @@ static struct dma_debug_entry *dma_entry_alloc(void)
         save_stack_trace(&entry->stacktrace);
 #endif
 
-out:
-        spin_unlock_irqrestore(&free_entries_lock, flags);
-
         return entry;
 }