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Commit 29cdd4e4 authored by Jakub Kicinski's avatar Jakub Kicinski Committed by Joerg Roedel
Browse files

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: default avatarJakub Kicinski <kubakici@wp.pl>
Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 00341028

lib/dma-debug.c

+5 −5
Original line number Diff line number Diff line
@@ -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;

}