@@ -241,18 +241,6 @@ static inline bool is_page_busy(struct dma_page *page)
return page->in_use != 0;
}
-static void pool_free_page(struct dma_pool *pool, struct dma_page *page)
-{
- dma_addr_t dma = page->dma;
-
-#ifdef DMAPOOL_DEBUG
- memset(page->vaddr, POOL_POISON_FREED, pool->allocation);
-#endif
- dma_free_coherent(pool->dev, pool->allocation, page->vaddr, dma);
- list_del(&page->page_list);
- kfree(page);
-}
-
/**
* dma_pool_destroy - destroys a pool of dma memory blocks.
* @pool: dma pool that will be destroyed
@@ -280,14 +268,14 @@ void dma_pool_destroy(struct dma_pool *pool)
mutex_unlock(&pools_reg_lock);
list_for_each_entry_safe(page, tmp, &pool->page_list, page_list) {
- if (is_page_busy(page)) {
+ if (!is_page_busy(page))
+ dma_free_coherent(pool->dev, pool->allocation,
+ page->vaddr, page->dma);
+ else
dev_err(pool->dev, "%s %s, %p busy\n", __func__,
pool->name, page->vaddr);
- /* leak the still-in-use consistent memory */
- list_del(&page->page_list);
- kfree(page);
- } else
- pool_free_page(pool, page);
+ list_del(&page->page_list);
+ kfree(page);
}
kfree(pool);
@@ -445,11 +433,6 @@ void dma_pool_free(struct dma_pool *pool, void *vaddr, dma_addr_t dma)
page->in_use--;
*(int *)vaddr = page->offset;
page->offset = offset;
- /*
- * Resist a temptation to do
- * if (!is_page_busy(page)) pool_free_page(pool, page);
- * Better have a few empty pages hang around.
- */
spin_unlock_irqrestore(&pool->lock, flags);
}
EXPORT_SYMBOL(dma_pool_free);