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media: atomisp: add more comments about frame allocation 

The frame allocation logic happens differently for userptr
or normal mmap. On a quick look, this sounded to be unbalanced,
but the logic should actually work for both cases.

Add an extra comment to reflect it.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
alistair/sunxi64-5.8
Mauro Carvalho Chehab 2020-05-27 14:21:26 +02:00
parent 27b778c5ef
commit 591e6a0aad
1 changed files with 5 additions and 1 deletions
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6
drivers/staging/media/atomisp/pci/atomisp_ioctl.c
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@ -1052,7 +1052,7 @@ int __atomisp_reqbufs(struct file *file, void *fh,
atomisp_alloc_css_stat_bufs(asd, stream_id);
/*
* for user pointer type, buffers are not really allcated here,
* for user pointer type, buffers are not really allocated here,
* buffers are setup in QBUF operation through v4l2_buffer structure
*/
if (req->memory == V4L2_MEMORY_USERPTR)
@ -1225,6 +1225,10 @@ static int atomisp_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
buf->flags |= V4L2_BUF_FLAG_MAPPED;
buf->flags |= V4L2_BUF_FLAG_QUEUED;
buf->flags &= ~V4L2_BUF_FLAG_DONE;
/*
* For mmap, frames were allocated at request buffers
*/
}
done: