提交 4ffabdb3 编写于 作者: P Pawel Osciak 提交者: Mauro Carvalho Chehab

[media] vb2: vb2_poll() fix return values for file I/O mode

poll() should be returning poll-specific error values, not E* errors.
Signed-off-by: NPawel Osciak <pawel@osciak.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>
上级 95072084
......@@ -1364,18 +1364,18 @@ unsigned int vb2_poll(struct vb2_queue *q, struct file *file, poll_table *wait)
struct vb2_buffer *vb = NULL;
/*
* Start file io emulator if streaming api has not been used yet.
* Start file I/O emulator only if streaming API has not been used yet.
*/
if (q->num_buffers == 0 && q->fileio == NULL) {
if (!V4L2_TYPE_IS_OUTPUT(q->type) && (q->io_modes & VB2_READ)) {
ret = __vb2_init_fileio(q, 1);
if (ret)
return ret;
return POLLERR;
}
if (V4L2_TYPE_IS_OUTPUT(q->type) && (q->io_modes & VB2_WRITE)) {
ret = __vb2_init_fileio(q, 0);
if (ret)
return ret;
return POLLERR;
/*
* Write to OUTPUT queue can be done immediately.
*/
......
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