25 Jun
2018
25 Jun
'18
6:21 p.m.
On 25-06-18, 11:11, Srinivas Kandagatla wrote:
+struct slim_stream_runtime *slim_stream_allocate(struct slim_device *dev,
const char *name)+{
- struct slim_stream_runtime *rt;
- unsigned long flags;
- rt = kzalloc(sizeof(*rt), GFP_KERNEL);
- if (!rt)
return ERR_PTR(-ENOMEM);- rt->name = kasprintf(GFP_KERNEL, "slim-%s", name);
- if (!rt->name) {
kfree(rt);return ERR_PTR(-ENOMEM);- }
- rt->dev = dev;
- rt->state = SLIM_STREAM_STATE_ALLOCATED;
- spin_lock_irqsave(&dev->stream_list_lock, flags);
- list_add_tail(&rt->node, &dev->stream_list);
- spin_unlock_irqrestore(&dev->stream_list_lock, flags);
Any reason for _irqsave variant? Do you expect stream APIs to be called from ISR?We can move to non irqsave variant here, as i do not see a case where
this list would be interrupted from irq context.
That's interesting can you please describe how? Also, won't it be modified from bottom half...
+/*
- slim_stream_enable() - Enable a prepared SLIMbus Stream
Do you want to check if it is already prepared ..?
Yep, I think most of the code needs similar state machine check, I will add this in next version.
so if you are tying to snd stream states then I don't think you need a state machine here. ALSA already does that for you so you can skip it :D
--
~Vinod