From 1c7b5eedb9884dc012a9146d523f7c5194e757d5 Mon Sep 17 00:00:00 2001 From: Alexandre Courbot Date: Fri, 6 Sep 2019 08:55:03 -0300 Subject: [PATCH] media: mtk-vcodec: vdec: clean up vidioc_vdec_s_fmt a bit Check for a potentially NULL pointer that was overlooked and use shorter accessors to the same data. While we are at it, sprinkle a few comments. Signed-off-by: Alexandre Courbot Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- .../media/platform/mtk-vcodec/mtk_vcodec_dec.c | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-) diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec.c index 653f111532ab..858727824889 100644 --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec.c +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec.c @@ -841,12 +841,20 @@ static int vidioc_vdec_s_fmt(struct file *file, void *priv, return -EINVAL; pix_mp = &f->fmt.pix_mp; + /* + * Setting OUTPUT format after OUTPUT buffers are allocated is invalid + * if using the stateful API. + */ if ((f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) && vb2_is_busy(&ctx->m2m_ctx->out_q_ctx.q)) { mtk_v4l2_err("out_q_ctx buffers already requested"); ret = -EBUSY; } + /* + * Setting CAPTURE format after CAPTURE buffers are allocated is + * invalid. + */ if ((f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) && vb2_is_busy(&ctx->m2m_ctx->cap_q_ctx.q)) { mtk_v4l2_err("cap_q_ctx buffers already requested"); @@ -865,6 +873,8 @@ static int vidioc_vdec_s_fmt(struct file *file, void *priv, fmt = mtk_vdec_find_format(f); } } + if (fmt == NULL) + return -EINVAL; q_data->fmt = fmt; vidioc_try_fmt(f, q_data->fmt); @@ -873,10 +883,10 @@ static int vidioc_vdec_s_fmt(struct file *file, void *priv, q_data->coded_width = pix_mp->width; q_data->coded_height = pix_mp->height; - ctx->colorspace = f->fmt.pix_mp.colorspace; - ctx->ycbcr_enc = f->fmt.pix_mp.ycbcr_enc; - ctx->quantization = f->fmt.pix_mp.quantization; - ctx->xfer_func = f->fmt.pix_mp.xfer_func; + ctx->colorspace = pix_mp->colorspace; + ctx->ycbcr_enc = pix_mp->ycbcr_enc; + ctx->quantization = pix_mp->quantization; + ctx->xfer_func = pix_mp->xfer_func; if (ctx->state == MTK_STATE_FREE) { ret = vdec_if_init(ctx, q_data->fmt->fourcc);