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[libc] use DFS file operations in poll #11887

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[libc] use DFS file operations in poll #11887

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16 changes: 14 additions & 2 deletions components/libc/posix/io/poll/poll.c
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Original file line number Diff line number Diff line change
Expand Up @@ -214,16 +214,28 @@ static int do_pollfd(struct pollfd *pollfd, rt_pollreq_t *req)
if (fd >= 0)
{
struct dfs_file *f = fd_get(fd);
const struct dfs_file_ops *fops = RT_NULL;
mask = POLLNVAL;

if (f)
{
#ifdef RT_USING_DFS_V2
fops = f->fops;
#else
if (f->vnode)
{
fops = f->vnode->fops;
}
#endif
}
if (fops)
{
mask = POLLMASK_DEFAULT;
if (f->vnode->fops->poll)
if (fops->poll)
{
req->_key = pollfd->events | POLLERR | POLLHUP;

mask = f->vnode->fops->poll(f, req);
mask = fops->poll(f, req);

/* dealwith the device return error -1*/
if (mask < 0)
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