async_tx: export async_tx_quiesce

Replace open coded "wait and acknowledge" instances with async_tx_quiesce.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>

diff --git a/crypto/async_tx/async_memcpy.c b/crypto/async_tx/async_memcpy.c
index a5eda80..06a7f4b 100644 (file)
--- a/crypto/async_tx/async_memcpy.c
+++ b/crypto/async_tx/async_memcpy.c
@@ -73,15 +73,7 @@ async_memcpy(struct page *dest, struct page *src, unsigned int dest_offset,
                pr_debug("%s: (sync) len: %zu\n", __func__, len);
 
                /* wait for any prerequisite operations */
-               if (depend_tx) {
-                       /* if ack is already set then we cannot be sure
-                        * we are referring to the correct operation
-                        */
-                       BUG_ON(async_tx_test_ack(depend_tx));
-                       if (dma_wait_for_async_tx(depend_tx) == DMA_ERROR)
-                               panic("%s: DMA_ERROR waiting for depend_tx\n",
-                                       __func__);
-               }
+               async_tx_quiesce(&depend_tx);
 
                dest_buf = kmap_atomic(dest, KM_USER0) + dest_offset;
                src_buf = kmap_atomic(src, KM_USER1) + src_offset;

diff --git a/crypto/async_tx/async_memset.c b/crypto/async_tx/async_memset.c
index 27a97dc..d48ed22 100644 (file)
--- a/crypto/async_tx/async_memset.c
+++ b/crypto/async_tx/async_memset.c
@@ -72,15 +72,7 @@ async_memset(struct page *dest, int val, unsigned int offset,
                dest_buf = (void *) (((char *) page_address(dest)) + offset);
 
                /* wait for any prerequisite operations */
-               if (depend_tx) {
-                       /* if ack is already set then we cannot be sure
-                        * we are referring to the correct operation
-                        */
-                       BUG_ON(async_tx_test_ack(depend_tx));
-                       if (dma_wait_for_async_tx(depend_tx) == DMA_ERROR)
-                               panic("%s: DMA_ERROR waiting for depend_tx\n",
-                                       __func__);
-               }
+               async_tx_quiesce(&depend_tx);
 
                memset(dest_buf, val, len);
 

diff --git a/crypto/async_tx/async_tx.c b/crypto/async_tx/async_tx.c
index 9325c61..78a61e7 100644 (file)
--- a/crypto/async_tx/async_tx.c
+++ b/crypto/async_tx/async_tx.c
@@ -607,15 +607,7 @@ async_trigger_callback(enum async_tx_flags flags,
                pr_debug("%s: (sync)\n", __func__);
 
                /* wait for any prerequisite operations */
-               if (depend_tx) {
-                       /* if ack is already set then we cannot be sure
-                        * we are referring to the correct operation
-                        */
-                       BUG_ON(async_tx_test_ack(depend_tx));
-                       if (dma_wait_for_async_tx(depend_tx) == DMA_ERROR)
-                               panic("%s: DMA_ERROR waiting for depend_tx\n",
-                                       __func__);
-               }
+               async_tx_quiesce(&depend_tx);
 
                async_tx_sync_epilog(flags, depend_tx, cb_fn, cb_param);
        }
@@ -624,6 +616,25 @@ async_trigger_callback(enum async_tx_flags flags,
 }
 EXPORT_SYMBOL_GPL(async_trigger_callback);
 
+/**
+ * async_tx_quiesce - ensure tx is complete and freeable upon return
+ * @tx - transaction to quiesce
+ */
+void async_tx_quiesce(struct dma_async_tx_descriptor **tx)
+{
+       if (*tx) {
+               /* if ack is already set then we cannot be sure
+                * we are referring to the correct operation
+                */
+               BUG_ON(async_tx_test_ack(*tx));
+               if (dma_wait_for_async_tx(*tx) == DMA_ERROR)
+                       panic("DMA_ERROR waiting for transaction\n");
+               async_tx_ack(*tx);
+               *tx = NULL;
+       }
+}
+EXPORT_SYMBOL_GPL(async_tx_quiesce);
+
 module_init(async_tx_init);
 module_exit(async_tx_exit);
 

diff --git a/crypto/async_tx/async_xor.c b/crypto/async_tx/async_xor.c
index 19d16e4..689ecce 100644 (file)
--- a/crypto/async_tx/async_xor.c
+++ b/crypto/async_tx/async_xor.c
@@ -30,24 +30,6 @@
 #include <linux/raid/xor.h>
 #include <linux/async_tx.h>
 
-/**
- * async_tx_quiesce - ensure tx is complete and freeable upon return
- * @tx - transaction to quiesce
- */
-static void async_tx_quiesce(struct dma_async_tx_descriptor **tx)
-{
-       if (*tx) {
-               /* if ack is already set then we cannot be sure
-                * we are referring to the correct operation
-                */
-               BUG_ON(async_tx_test_ack(*tx));
-               if (dma_wait_for_async_tx(*tx) == DMA_ERROR)
-                       panic("DMA_ERROR waiting for transaction\n");
-               async_tx_ack(*tx);
-               *tx = NULL;
-       }
-}
-
 /* do_async_xor - dma map the pages and perform the xor with an engine.
  *     This routine is marked __always_inline so it can be compiled away
  *     when CONFIG_DMA_ENGINE=n
@@ -219,15 +201,7 @@ async_xor(struct page *dest, struct page **src_list, unsigned int offset,
                }
 
                /* wait for any prerequisite operations */
-               if (depend_tx) {
-                       /* if ack is already set then we cannot be sure
-                        * we are referring to the correct operation
-                        */
-                       BUG_ON(async_tx_test_ack(depend_tx));
-                       if (dma_wait_for_async_tx(depend_tx) == DMA_ERROR)
-                               panic("%s: DMA_ERROR waiting for depend_tx\n",
-                                       __func__);
-               }
+               async_tx_quiesce(&depend_tx);
 
                do_sync_xor(dest, src_list, offset, src_cnt, len,
                            flags, depend_tx, cb_fn, cb_param);
@@ -309,17 +283,10 @@ async_xor_zero_sum(struct page *dest, struct page **src_list,
                tx = async_xor(dest, src_list, offset, src_cnt, len, xor_flags,
                        depend_tx, NULL, NULL);
 
-               if (tx) {
-                       if (dma_wait_for_async_tx(tx) == DMA_ERROR)
-                               panic("%s: DMA_ERROR waiting for tx\n",
-                                       __func__);
-                       async_tx_ack(tx);
-               }
+               async_tx_quiesce(&tx);
 
                *result = page_is_zero(dest, offset, len) ? 0 : 1;
 
-               tx = NULL;
-
                async_tx_sync_epilog(flags, depend_tx, cb_fn, cb_param);
        }
 

diff --git a/include/linux/async_tx.h b/include/linux/async_tx.h
index eb640f0..9f0e7bd 100644 (file)
--- a/include/linux/async_tx.h
+++ b/include/linux/async_tx.h
@@ -152,4 +152,6 @@ struct dma_async_tx_descriptor *
 async_trigger_callback(enum async_tx_flags flags,
        struct dma_async_tx_descriptor *depend_tx,
        dma_async_tx_callback cb_fn, void *cb_fn_param);
+
+void async_tx_quiesce(struct dma_async_tx_descriptor **tx);
 #endif /* _ASYNC_TX_H_ */