return err;
}
-subsys_initcall(dma_channel_table_init);
+arch_initcall(dma_channel_table_init);
/**
* dma_find_channel - find a channel to carry out the operation
struct dma_chan *chan;
int cpu;
- WARN_ONCE(dmaengine_ref_count == 0,
- "client called %s without a reference", __func__);
-
cpu = get_cpu();
chan = per_cpu_ptr(channel_table[tx_type], cpu)->chan;
put_cpu();
struct dma_device *device;
struct dma_chan *chan;
- WARN_ONCE(dmaengine_ref_count == 0,
- "client called %s without a reference", __func__);
-
rcu_read_lock();
list_for_each_entry_rcu(device, &dma_device_list, global_node) {
if (dma_has_cap(DMA_PRIVATE, device->cap_mask))
}
}
-static struct dma_chan *private_candidate(dma_cap_mask_t *mask, struct dma_device *dev)
+static struct dma_chan *private_candidate(dma_cap_mask_t *mask, struct dma_device *dev,
+ dma_filter_fn fn, void *fn_param)
{
struct dma_chan *chan;
- struct dma_chan *ret = NULL;
if (!__dma_device_satisfies_mask(dev, mask)) {
pr_debug("%s: wrong capabilities\n", __func__);
__func__, dma_chan_name(chan));
continue;
}
- ret = chan;
- break;
+ if (fn && !fn(chan, fn_param)) {
+ pr_debug("%s: %s filter said false\n",
+ __func__, dma_chan_name(chan));
+ continue;
+ }
+ return chan;
}
- return ret;
+ return NULL;
}
/**
{
struct dma_device *device, *_d;
struct dma_chan *chan = NULL;
- bool ack;
int err;
/* Find a channel */
mutex_lock(&dma_list_mutex);
list_for_each_entry_safe(device, _d, &dma_device_list, global_node) {
- chan = private_candidate(mask, device);
- if (!chan)
- continue;
-
- if (fn)
- ack = fn(chan, fn_param);
- else
- ack = true;
-
- if (ack) {
+ chan = private_candidate(mask, device, fn, fn_param);
+ if (chan) {
/* 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
dma_chan_name(chan), err);
else
break;
- } else
- pr_debug("%s: %s filter said false\n",
- __func__, dma_chan_name(chan));
- chan = NULL;
+ chan = NULL;
+ }
}
mutex_unlock(&dma_list_mutex);
if (!dep)
return;
+ /* we'll submit tx->next now, so clear the link */
+ tx->next = NULL;
chan = dep->chan;
/* keep submitting up until a channel switch is detected
mutex_init(&dma_list_mutex);
return class_register(&dma_devclass);
}
-subsys_initcall(dma_bus_init);
+arch_initcall(dma_bus_init);