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Diffstat (limited to 'target/linux/ipq806x/patches-3.18/154-dmaengine-Add-device_terminate_all-callback.patch')
-rw-r--r--target/linux/ipq806x/patches-3.18/154-dmaengine-Add-device_terminate_all-callback.patch47
1 files changed, 47 insertions, 0 deletions
diff --git a/target/linux/ipq806x/patches-3.18/154-dmaengine-Add-device_terminate_all-callback.patch b/target/linux/ipq806x/patches-3.18/154-dmaengine-Add-device_terminate_all-callback.patch
new file mode 100644
index 0000000..422f7fb
--- /dev/null
+++ b/target/linux/ipq806x/patches-3.18/154-dmaengine-Add-device_terminate_all-callback.patch
@@ -0,0 +1,47 @@
+From 7fa0cf462daa6f6121b332b87833d7f5bdb515c0 Mon Sep 17 00:00:00 2001
+From: Maxime Ripard <maxime.ripard@free-electrons.com>
+Date: Mon, 17 Nov 2014 14:42:02 +0100
+Subject: [PATCH] dmaengine: Add device_terminate_all callback
+
+Split out the terminate_all command from device_control to a dma_device
+callback. In order to preserve backward capability, still rely on
+device_control if no such callback has been implemented.
+
+Eventually, this will allow to create a generic dma_slave_caps callback.
+
+Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
+Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+Signed-off-by: Vinod Koul <vinod.koul@intel.com>
+---
+ include/linux/dmaengine.h | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+--- a/include/linux/dmaengine.h
++++ b/include/linux/dmaengine.h
+@@ -611,6 +611,8 @@ struct dma_tx_state {
+ * code
+ * @device_control: manipulate all pending operations on a channel, returns
+ * zero or error code
++ * @device_terminate_all: Aborts all transfers on a channel. Returns 0
++ * or an error code
+ * @device_tx_status: poll for transaction completion, the optional
+ * txstate parameter can be supplied with a pointer to get a
+ * struct with auxiliary transfer status information, otherwise the call
+@@ -680,6 +682,7 @@ struct dma_device {
+ struct dma_slave_config *config);
+ int (*device_control)(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
+ unsigned long arg);
++ int (*device_terminate_all)(struct dma_chan *chan);
+
+ enum dma_status (*device_tx_status)(struct dma_chan *chan,
+ dma_cookie_t cookie,
+@@ -789,6 +792,9 @@ static inline int dma_get_slave_caps(str
+
+ static inline int dmaengine_terminate_all(struct dma_chan *chan)
+ {
++ if (chan->device->device_terminate_all)
++ return chan->device->device_terminate_all(chan);
++
+ return dmaengine_device_control(chan, DMA_TERMINATE_ALL, 0);
+ }
+