From: Ming Qian <ming.qian@nxp.com>
Date: Mon, 21 Nov 2022 06:34:42 +0000 (+0000)
Subject: media: amphion: lock and check m2m_ctx in event handler
X-Git-Tag: v6.1.8~1552
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c9411d57c1de5673c5cc6d14fbf802ae7c96bdfb;p=platform%2Fkernel%2Flinux-starfive.git

media: amphion: lock and check m2m_ctx in event handler

[ Upstream commit 1ade3f3f16986cd7c6fce02feede957f03eb8a42 ]

driver needs to cancel vpu before releasing the vpu instance,
so call v4l2_m2m_ctx_release() first,
to handle the redundant event triggered after m2m_ctx is released.

lock and check m2m_ctx in the event handler.

Fixes: 3cd084519c6f ("media: amphion: add vpu v4l2 m2m support")
Signed-off-by: Ming Qian <ming.qian@nxp.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/media/platform/amphion/vpu_msgs.c b/drivers/media/platform/amphion/vpu_msgs.c
index d8247f3..92672a8 100644
--- a/drivers/media/platform/amphion/vpu_msgs.c
+++ b/drivers/media/platform/amphion/vpu_msgs.c
@@ -43,6 +43,7 @@ static void vpu_session_handle_mem_request(struct vpu_inst *inst, struct vpu_rpc
 		  req_data.ref_frame_num,
 		  req_data.act_buf_size,
 		  req_data.act_buf_num);
+	vpu_inst_lock(inst);
 	call_void_vop(inst, mem_request,
 		      req_data.enc_frame_size,
 		      req_data.enc_frame_num,
@@ -50,6 +51,7 @@ static void vpu_session_handle_mem_request(struct vpu_inst *inst, struct vpu_rpc
 		      req_data.ref_frame_num,
 		      req_data.act_buf_size,
 		      req_data.act_buf_num);
+	vpu_inst_unlock(inst);
 }
 
 static void vpu_session_handle_stop_done(struct vpu_inst *inst, struct vpu_rpc_event *pkt)
diff --git a/drivers/media/platform/amphion/vpu_v4l2.c b/drivers/media/platform/amphion/vpu_v4l2.c
index a24e2d0..590d108 100644
--- a/drivers/media/platform/amphion/vpu_v4l2.c
+++ b/drivers/media/platform/amphion/vpu_v4l2.c
@@ -242,8 +242,12 @@ int vpu_process_capture_buffer(struct vpu_inst *inst)
 
 struct vb2_v4l2_buffer *vpu_next_src_buf(struct vpu_inst *inst)
 {
-	struct vb2_v4l2_buffer *src_buf = v4l2_m2m_next_src_buf(inst->fh.m2m_ctx);
+	struct vb2_v4l2_buffer *src_buf = NULL;
 
+	if (!inst->fh.m2m_ctx)
+		return NULL;
+
+	src_buf = v4l2_m2m_next_src_buf(inst->fh.m2m_ctx);
 	if (!src_buf || vpu_get_buffer_state(src_buf) == VPU_BUF_STATE_IDLE)
 		return NULL;
 
@@ -266,7 +270,7 @@ void vpu_skip_frame(struct vpu_inst *inst, int count)
 	enum vb2_buffer_state state;
 	int i = 0;
 
-	if (count <= 0)
+	if (count <= 0 || !inst->fh.m2m_ctx)
 		return;
 
 	while (i < count) {