From: Luca Ceresoli <luca@lucaceresoli.net>
Date: Thu, 8 Mar 2018 12:26:22 +0000 (-0500)
Subject: media: vb2-core: vb2_ops: document non-interrupt-context calling
X-Git-Tag: v4.19~1321^2~114
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=3f97df91a189ac84711467a687bef69dfd88b53c;p=platform%2Fkernel%2Flinux-rpi.git

media: vb2-core: vb2_ops: document non-interrupt-context calling

Driver writers can benefit in knowing if/when callbacks are called in
interrupt context. But it is not completely obvious here, so document
it.

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Pawel Osciak <pawel@osciak.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
---

diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h
index f200008..f6818f73 100644
--- a/include/media/videobuf2-core.h
+++ b/include/media/videobuf2-core.h
@@ -296,6 +296,9 @@ struct vb2_buffer {
 /**
  * struct vb2_ops - driver-specific callbacks.
  *
+ * These operations are not called from interrupt context except where
+ * mentioned specifically.
+ *
  * @queue_setup:	called from VIDIOC_REQBUFS() and VIDIOC_CREATE_BUFS()
  *			handlers before memory allocation. It can be called
  *			twice: if the original number of requested buffers