diff mbox

[1/5] dmaengine: Adding error handling flag

Message ID 146706897936.188649.9714053337305649647.stgit@djiang5-desk3.ch.intel.com (mailing list archive)
State Changes Requested
Headers show

Commit Message

Dave Jiang June 27, 2016, 11:09 p.m. UTC 
Adding error flag for the call back descriptor to notify upper layer that
an error has occurred with this particular DMA op.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
---
 include/linux/dmaengine.h |   15 +++++++++++++++
 1 file changed, 15 insertions(+)


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diff mbox

Patch

diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 0174337..6524881 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -453,6 +453,20 @@  struct dmaengine_unmap_data {
 };
 
 /**
+ * enum err_result_flags - result of DMA operations
+ * @ERR_DMA_NONE - no errors
+ * @ERR_DMA_READ - DMA read error
+ * @ERR_DMA_WRITE - DMA write error
+ * @ERR_DMA_ABORT - Operation aborted
+ */
+enum err_result_flags {
+	ERR_DMA_NONE = 0,
+	ERR_DMA_READ,
+	ERR_DMA_WRITE,
+	ERR_DMA_ABORT,
+};
+
+/**
  * struct dma_async_tx_descriptor - async transaction descriptor
  * ---dma generic offload fields---
  * @cookie: tracking cookie for this transaction, set to -EBUSY if
@@ -480,6 +494,7 @@  struct dma_async_tx_descriptor {
 	dma_async_tx_callback callback;
 	void *callback_param;
 	struct dmaengine_unmap_data *unmap;
+	enum err_result_flags result;
 #ifdef CONFIG_ASYNC_TX_ENABLE_CHANNEL_SWITCH
 	struct dma_async_tx_descriptor *next;
 	struct dma_async_tx_descriptor *parent;