diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2010-10-08 03:44:50 +0400 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2010-10-08 04:08:32 +0400 |
| commit | 5fc6d897fde352bad5db5767e7260741a8cdd9e9 (patch) | |
| tree | cb918dd33b8288aadead08b04b9f308f9d8bcbd1 /drivers/dma/dmaengine.c | |
| parent | 400fb7f6a0cfe13025cb0296fdb4737da7025a8a (diff) | |
| download | linux-5fc6d897fde352bad5db5767e7260741a8cdd9e9.tar.xz | |
async_tx: make async_tx channel switching opt-in
The majority of drivers in drivers/dma/ will never establish cross
channel operation chains and do not need the extra overhead in struct
dma_async_tx_descriptor. Make channel switching opt-in by default.
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Ira Snyder <iws@ovro.caltech.edu>
Cc: Linus Walleij <linus.walleij@stericsson.com>
Cc: Saeed Bishara <saeed@marvell.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/dma/dmaengine.c')
| -rw-r--r-- | drivers/dma/dmaengine.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c index 235153cd7ac5..8bcb15fb959d 100644 --- a/drivers/dma/dmaengine.c +++ b/drivers/dma/dmaengine.c @@ -706,7 +706,7 @@ int dma_async_device_register(struct dma_device *device) BUG_ON(!device->dev); /* note: this only matters in the - * CONFIG_ASYNC_TX_DISABLE_CHANNEL_SWITCH=y case + * CONFIG_ASYNC_TX_ENABLE_CHANNEL_SWITCH=n case */ if (device_has_all_tx_types(device)) dma_cap_set(DMA_ASYNC_TX, device->cap_mask); @@ -980,7 +980,7 @@ void dma_async_tx_descriptor_init(struct dma_async_tx_descriptor *tx, struct dma_chan *chan) { tx->chan = chan; - #ifndef CONFIG_ASYNC_TX_DISABLE_CHANNEL_SWITCH + #ifdef CONFIG_ASYNC_TX_ENABLE_CHANNEL_SWITCH spin_lock_init(&tx->lock); #endif } |