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authorDan Williams <dan.j.williams@intel.com>2010-03-03 21:22:21 -0700
committerDan Williams <dan.j.williams@intel.com>2010-03-03 21:22:21 -0700
commitdd58ffcf5a5352fc10820c8ffbcd5fed416a2c3a (patch)
treef36172b40f9f3fc2c646f70da40e01705399b6b8 /drivers/dma/ipu
parentaa4d72ae946a4fa40486b871717778734184fa29 (diff)
parent56a5d3cf21c71963c8fc506e9b9d3f71641d9c71 (diff)
downloadlinux-bcache-dd58ffcf5a5352fc10820c8ffbcd5fed416a2c3a.tar.zst
Merge branch 'coh' into dmaengine
Diffstat (limited to 'drivers/dma/ipu')
-rw-r--r--drivers/dma/ipu/ipu_idmac.c25
1 files changed, 7 insertions, 18 deletions
diff --git a/drivers/dma/ipu/ipu_idmac.c b/drivers/dma/ipu/ipu_idmac.c
index 1c518f1cc49b..2a446397c884 100644
--- a/drivers/dma/ipu/ipu_idmac.c
+++ b/drivers/dma/ipu/ipu_idmac.c
@@ -748,12 +748,10 @@ static void ipu_select_buffer(enum ipu_channel channel, int buffer_n)
* @buffer_n: buffer number to update.
* 0 or 1 are the only valid values.
* @phyaddr: buffer physical address.
- * @return: Returns 0 on success or negative error code on failure. This
- * function will fail if the buffer is set to ready.
*/
/* Called under spin_lock(_irqsave)(&ichan->lock) */
-static int ipu_update_channel_buffer(struct idmac_channel *ichan,
- int buffer_n, dma_addr_t phyaddr)
+static void ipu_update_channel_buffer(struct idmac_channel *ichan,
+ int buffer_n, dma_addr_t phyaddr)
{
enum ipu_channel channel = ichan->dma_chan.chan_id;
uint32_t reg;
@@ -793,8 +791,6 @@ static int ipu_update_channel_buffer(struct idmac_channel *ichan,
}
spin_unlock_irqrestore(&ipu_data.lock, flags);
-
- return 0;
}
/* Called under spin_lock_irqsave(&ichan->lock) */
@@ -803,7 +799,6 @@ static int ipu_submit_buffer(struct idmac_channel *ichan,
{
unsigned int chan_id = ichan->dma_chan.chan_id;
struct device *dev = &ichan->dma_chan.dev->device;
- int ret;
if (async_tx_test_ack(&desc->txd))
return -EINTR;
@@ -814,14 +809,7 @@ static int ipu_submit_buffer(struct idmac_channel *ichan,
* could make it conditional on status >= IPU_CHANNEL_ENABLED, but
* doing it again shouldn't hurt either.
*/
- ret = ipu_update_channel_buffer(ichan, buf_idx,
- sg_dma_address(sg));
-
- if (ret < 0) {
- dev_err(dev, "Updating sg %p on channel 0x%x buffer %d failed!\n",
- sg, chan_id, buf_idx);
- return ret;
- }
+ ipu_update_channel_buffer(ichan, buf_idx, sg_dma_address(sg));
ipu_select_buffer(chan_id, buf_idx);
dev_dbg(dev, "Updated sg %p on channel 0x%x buffer %d\n",
@@ -1366,10 +1354,11 @@ static irqreturn_t idmac_interrupt(int irq, void *dev_id)
if (likely(sgnew) &&
ipu_submit_buffer(ichan, descnew, sgnew, ichan->active_buffer) < 0) {
- callback = desc->txd.callback;
- callback_param = desc->txd.callback_param;
+ callback = descnew->txd.callback;
+ callback_param = descnew->txd.callback_param;
spin_unlock(&ichan->lock);
- callback(callback_param);
+ if (callback)
+ callback(callback_param);
spin_lock(&ichan->lock);
}