---

yaml
---
r: 338751
b: refs/heads/master
c: 5de55b2
h: refs/heads/master
i:
  338749: ff78b52
  338747: eff0bcb
  338743: af4bbb9
  338735: fdc9d72
  338719: df1b992
  338687: 4410a75
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 9ff4868e3051d9128a24dd330bed32011a11421d
+refs/heads/master: 5de55b265a13bc263c823bbe05d87d2c5e785f6f

trunk/mm/dmapool.c

@@ -332,6 +332,30 @@ void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags,
 	retval = offset + page->vaddr;
 	*handle = offset + page->dma;
 #ifdef	DMAPOOL_DEBUG
+	{
+		int i;
+		u8 *data = retval;
+		/* page->offset is stored in first 4 bytes */
+		for (i = sizeof(page->offset); i < pool->size; i++) {
+			if (data[i] == POOL_POISON_FREED)
+				continue;
+			if (pool->dev)
+				dev_err(pool->dev,
+					"dma_pool_alloc %s, %p (corruped)\n",
+					pool->name, retval);
+			else
+				pr_err("dma_pool_alloc %s, %p (corruped)\n",
+					pool->name, retval);
+
+			/*
+			 * Dump the first 4 bytes even if they are not
+			 * POOL_POISON_FREED
+			 */
+			print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1,
+					data, pool->size, 1);
+			break;
+		}
+	}
 	memset(retval, POOL_POISON_ALLOCATED, pool->size);
 #endif
 	spin_unlock_irqrestore(&pool->lock, flags);