On Fri, 24 Jun 2011 14:19:27 -0600
Jonathan Corbet <cor...@lwn.net> wrote:
> Here's a little something I decided to hack on rather than addressing all
> the real work I have to do.
...and while I was looking at this code, I noticed one little curious
thing:
int vb2_reqbufs(struct vb2_queue *q, struct v4l2_requestbuffers *req)
{
/* ... */
/* Finally, allocate buffers and video memory */
ret = __vb2_queue_alloc(q, req->memory, num_buffers, num_planes,
plane_sizes);
if (ret < 0) {
dprintk(1, "Memory allocation failed with error: %d\n", ret);
return ret;
}
If you actually look at __vb2_queue_alloc(), it claims to return the
number of buffers actually allocated, and an inspection of the code bears
up that claim. So it can never return a negative value. Do you maybe
want "if (ret <= 0) {" there instead? One assumes there will be few
drivers so accommodating as to work with zero buffers.
Thanks,
jon
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