dmaengine: kill enum dma_state_client
DMA_NAK is now useless. We can just use a bool instead.
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index b245c38..cdc8ecf 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -440,7 +440,7 @@
{
struct dma_device *device, *_d;
struct dma_chan *chan = NULL;
- enum dma_state_client ack;
+ bool ack;
int err;
/* Find a channel */
@@ -453,9 +453,9 @@
if (fn)
ack = fn(chan, fn_param);
else
- ack = DMA_ACK;
+ ack = true;
- if (ack == DMA_ACK) {
+ if (ack) {
/* Found a suitable channel, try to grab, prep, and
* return it. We first set DMA_PRIVATE to disable
* balance_ref_count as this channel will not be
@@ -473,15 +473,9 @@
dev_name(&chan->dev), err);
else
break;
- } else if (ack == DMA_DUP) {
- pr_debug("%s: %s filter said DMA_DUP\n",
- __func__, dev_name(&chan->dev));
- } else if (ack == DMA_NAK) {
- pr_debug("%s: %s filter said DMA_NAK\n",
- __func__, dev_name(&chan->dev));
- break;
} else
- WARN_ONCE(1, "filter_fn: unknown response?\n");
+ pr_debug("%s: %s filter said false\n",
+ __func__, dev_name(&chan->dev));
chan = NULL;
}
mutex_unlock(&dma_list_mutex);
diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index 1d6e48f..c77d47c 100644
--- a/drivers/dma/dmatest.c
+++ b/drivers/dma/dmatest.c
@@ -363,12 +363,12 @@
return 0;
}
-static enum dma_state_client filter(struct dma_chan *chan, void *param)
+static bool filter(struct dma_chan *chan, void *param)
{
if (!dmatest_match_channel(chan) || !dmatest_match_device(chan->device))
- return DMA_DUP;
+ return false;
else
- return DMA_ACK;
+ return true;
}
static int __init dmatest_init(void)
diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
index 4b567a0..b0042d0 100644
--- a/drivers/mmc/host/atmel-mci.c
+++ b/drivers/mmc/host/atmel-mci.c
@@ -1544,14 +1544,14 @@
}
#ifdef CONFIG_MMC_ATMELMCI_DMA
-static enum dma_state_client filter(struct dma_chan *chan, void *slave)
+static bool filter(struct dma_chan *chan, void *slave)
{
struct dw_dma_slave *dws = slave;
if (dws->dma_dev == chan->device->dev)
- return DMA_ACK;
+ return true;
else
- return DMA_DUP;
+ return false;
}
#endif
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index bca2fc7..1419a50 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -29,18 +29,6 @@
#include <linux/dma-mapping.h>
/**
- * enum dma_state_client - state of the channel in the client
- * @DMA_ACK: client would like to use, or was using this channel
- * @DMA_DUP: client has already seen this channel, or is not using this channel
- * @DMA_NAK: client does not want to see any more channels
- */
-enum dma_state_client {
- DMA_ACK,
- DMA_DUP,
- DMA_NAK,
-};
-
-/**
* typedef dma_cookie_t - an opaque DMA cookie
*
* if dma_cookie_t is >0 it's a DMA request cookie, <0 it's an error code
@@ -160,9 +148,10 @@
* When this optional parameter is specified in a call to dma_request_channel a
* suitable channel is passed to this routine for further dispositioning before
* being returned. Where 'suitable' indicates a non-busy channel that
- * satisfies the given capability mask.
+ * satisfies the given capability mask. It returns 'true' to indicate that the
+ * channel is suitable.
*/
-typedef enum dma_state_client (*dma_filter_fn)(struct dma_chan *chan, void *filter_param);
+typedef bool (*dma_filter_fn)(struct dma_chan *chan, void *filter_param);
typedef void (*dma_async_tx_callback)(void *dma_async_param);
/**