dma_pool_destroy

Name:dma_pool_destroy - destroys a pool of dma memory blocks.*@pool: dma pool that will be destroyed* Context: !in_interrupt()* Caller guarantees that no more memory from the pool is in use,* and that nothing will try to use the pool after this call.

Proto:void dma_pool_destroy(struct dma_pool *pool)

Type:void

Parameter:

Type	Parameter	Name
struct dma_pool *	pool

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bool empty = false

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If Value for the false possibility is greater at compile time(!pool) Then Return

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mutex_lock( & pools_reg_lock)

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mutex_lock( & pools_lock)

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deletes entry from list

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If dev && list_empty - tests whether a list is empty*@head: the list to test. Then empty = true

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mutex_unlock - release the mutex*@lock: the mutex to be released* Unlock a mutex that has been locked by this task previously.* This function must not be used in interrupt context. Unlocking* of a not locked mutex is not allowed.

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If empty Then device_remove_file(dev, & dev_attr_pools)

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mutex_unlock - release the mutex*@lock: the mutex to be released* Unlock a mutex that has been locked by this task previously.* This function must not be used in interrupt context. Unlocking* of a not locked mutex is not allowed.

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When Not list_empty - tests whether a list is empty*@head: the list to test. cycle

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page = list_entry - get the struct for this entry*@ptr: the &struct list_head pointer.*@type: the type of the struct this is embedded in.*@member: the name of the list_head within the struct.(next, structdma_page, page_list)

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If is_page_busy(page) Then

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If dev Then dev_err(dev, "dma_pool_destroy %s, %p busy\n", name, vaddr)

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Else pr_err("dma_pool_destroy %s, %p busy\n", name, vaddr)

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deletes entry from list

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Else pool_free_page(pool, page)

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**Caller**
Name	Describe
dmam_pool_release	Managed DMA pool

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