linux-kernel - [PATCH 5/5] media: mtk-vcodec: venc: Fail if a msg sent to VPU was not signaled

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Date:   Wed,  4 Aug 2021 16:27:29 +0200
From:   Dafna Hirschfeld <dafna.hirschfeld@...labora.com>
To:     linux-media@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Cc:     dafna.hirschfeld@...labora.com, hverkuil@...all.nl,
        kernel@...labora.com, dafna3@...il.com, mchehab@...nel.org,
        tfiga@...omium.org, tiffany.lin@...iatek.com,
        andrew-ct.chen@...iatek.com, matthias.bgg@...il.com,
        hsinyi@...omium.org, maoguang.meng@...iatek.com,
        irui.wang@...iatek.com, acourbot@...omium.org,
        Yunfei.Dong@...iatek.com, yong.wu@...iatek.com, eizan@...omium.org
Subject: [PATCH 5/5] media: mtk-vcodec: venc: Fail if a msg sent to VPU was not signaled

Each message sent to the VPU should raise a signal. The signal
handler sets vpu->signaled. Test the field and fail
if it is 0.

Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@...labora.com>
---
 drivers/media/platform/mtk-vcodec/venc_vpu_if.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/mtk-vcodec/venc_vpu_if.c b/drivers/media/platform/mtk-vcodec/venc_vpu_if.c
index 234705ba7cd6..8331b1bd1971 100644
--- a/drivers/media/platform/mtk-vcodec/venc_vpu_if.c
+++ b/drivers/media/platform/mtk-vcodec/venc_vpu_if.c
@@ -92,6 +92,7 @@ static int vpu_enc_send_msg(struct venc_vpu_inst *vpu, void *msg,
 {
 	int status;
 
+	vpu->signaled = 0;
 	mtk_vcodec_debug_enter(vpu);
 
 	if (!vpu->ctx->dev->fw_handler) {
@@ -106,6 +107,8 @@ static int vpu_enc_send_msg(struct venc_vpu_inst *vpu, void *msg,
 			       *(uint32_t *)msg, len, status);
 		return -EINVAL;
 	}
+	if (!vpu->signaled)
+		return -EINVAL;
 	if (vpu->failure)
 		return -EINVAL;
 
@@ -122,7 +125,6 @@ int vpu_enc_init(struct venc_vpu_inst *vpu)
 	mtk_vcodec_debug_enter(vpu);
 
 	init_waitqueue_head(&vpu->wq_hd);
-	vpu->signaled = 0;
 	vpu->failure = 0;
 
 	status = mtk_vcodec_fw_ipi_register(vpu->ctx->dev->fw_handler, vpu->id,
-- 
2.17.1