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In this case, the drain will be blocked. add the hw lock around the ioctl encoder/decoder cmd, to synchronize with the buf_done. Fixes: 4911c5acf935 ("media: imx-jpeg: Implement drain using v4l2-mem2mem helpers") Signed-off-by: Ming Qian --- drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c b/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c index 975e11f9821a..ab122ecaf7c6 100644 --- a/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c +++ b/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c @@ -1225,6 +1225,7 @@ static int mxc_jpeg_decoder_cmd(struct file *file, void *priv, { struct v4l2_fh *fh = file->private_data; struct mxc_jpeg_ctx *ctx = mxc_jpeg_fh_to_ctx(fh); + unsigned long flags; int ret; ret = v4l2_m2m_ioctl_try_decoder_cmd(file, fh, cmd); @@ -1234,7 +1235,9 @@ static int mxc_jpeg_decoder_cmd(struct file *file, void *priv, if (!vb2_is_streaming(v4l2_m2m_get_src_vq(fh->m2m_ctx))) return 0; + spin_lock_irqsave(&ctx->mxc_jpeg->hw_lock, flags); ret = v4l2_m2m_ioctl_decoder_cmd(file, priv, cmd); + spin_unlock_irqrestore(&ctx->mxc_jpeg->hw_lock, flags); if (ret < 0) return ret; @@ -1255,6 +1258,7 @@ static int mxc_jpeg_encoder_cmd(struct file *file, void *priv, { struct v4l2_fh *fh = file->private_data; struct mxc_jpeg_ctx *ctx = mxc_jpeg_fh_to_ctx(fh); + unsigned long flags; int ret; ret = v4l2_m2m_ioctl_try_encoder_cmd(file, fh, cmd); @@ -1265,7 +1269,9 @@ static int mxc_jpeg_encoder_cmd(struct file *file, void *priv, !vb2_is_streaming(v4l2_m2m_get_dst_vq(fh->m2m_ctx))) return 0; + spin_lock_irqsave(&ctx->mxc_jpeg->hw_lock, flags); ret = v4l2_m2m_ioctl_encoder_cmd(file, fh, cmd); + spin_unlock_irqrestore(&ctx->mxc_jpeg->hw_lock, flags); if (ret < 0) return 0;