From:   Benjamin Gaignard <benjamin.gaignard@collabora.com>
To:     ezequiel@vanguardiasur.com.ar, p.zabel@pengutronix.de,
        mchehab@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de,
        kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com,
        hverkuil-cisco@xs4all.nl, nicolas.dufresne@collabora.co.uk
Cc:     linux-media@vger.kernel.org, linux-rockchip@lists.infradead.org,
        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        kernel@collabora.com,
        Benjamin Gaignard <benjamin.gaignard@collabora.com>
Subject: [PATCH v6 2/5] media: verisilicon: Do not use ctx fields as format storage when resetting
Date:   Mon, 30 Jan 2023 14:57:59 +0100
Message-Id: <20230130135802.744743-3-benjamin.gaignard@collabora.com>
In-Reply-To: <20230130135802.744743-1-benjamin.gaignard@collabora.com>
References: <20230130135802.744743-1-benjamin.gaignard@collabora.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

Source and destination pixel formats fields of context structure should
not be used as storage when resetting the format.
Use local variables instead and let hantro_set_fmt_out() and
hantro_set_fmt_cap() set them correctly later.

Fixes: dc39473d0340 ("media: hantro: imx8m: Enable 10bit decoding")

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
---
 .../media/platform/verisilicon/hantro_v4l2.c  | 40 +++++++++----------
 1 file changed, 18 insertions(+), 22 deletions(-)

diff --git a/drivers/media/platform/verisilicon/hantro_v4l2.c b/drivers/media/platform/verisilicon/hantro_v4l2.c
index 33cb865238de..e60151a8a401 100644
--- a/drivers/media/platform/verisilicon/hantro_v4l2.c
+++ b/drivers/media/platform/verisilicon/hantro_v4l2.c
@@ -377,47 +377,43 @@ static void
 hantro_reset_encoded_fmt(struct hantro_ctx *ctx)
 {
 	const struct hantro_fmt *vpu_fmt;
-	struct v4l2_pix_format_mplane *fmt;
+	struct v4l2_pix_format_mplane fmt;
 
 	vpu_fmt = hantro_get_default_fmt(ctx, true);
+	if (!vpu_fmt)
+		return;
 
+	hantro_reset_fmt(&fmt, vpu_fmt);
+	fmt.width = vpu_fmt->frmsize.min_width;
+	fmt.height = vpu_fmt->frmsize.min_height;
 	if (ctx->is_encoder)
-		fmt = &ctx->dst_fmt;
-	else
-		fmt = &ctx->src_fmt;
-
-	hantro_reset_fmt(fmt, vpu_fmt);
-	fmt->width = vpu_fmt->frmsize.min_width;
-	fmt->height = vpu_fmt->frmsize.min_height;
-	if (ctx->is_encoder)
-		hantro_set_fmt_cap(ctx, fmt);
+		hantro_set_fmt_cap(ctx, &fmt);
 	else
-		hantro_set_fmt_out(ctx, fmt);
+		hantro_set_fmt_out(ctx, &fmt);
 }
 
 static void
 hantro_reset_raw_fmt(struct hantro_ctx *ctx)
 {
 	const struct hantro_fmt *raw_vpu_fmt;
-	struct v4l2_pix_format_mplane *raw_fmt, *encoded_fmt;
+	struct v4l2_pix_format_mplane raw_fmt, *encoded_fmt;
 
 	raw_vpu_fmt = hantro_get_default_fmt(ctx, false);
+	if (!raw_vpu_fmt)
+		return;
 
-	if (ctx->is_encoder) {
-		raw_fmt = &ctx->src_fmt;
+	if (ctx->is_encoder)
 		encoded_fmt = &ctx->dst_fmt;
-	} else {
-		raw_fmt = &ctx->dst_fmt;
+	else
 		encoded_fmt = &ctx->src_fmt;
-	}
 
-	hantro_reset_fmt(raw_fmt, raw_vpu_fmt);
-	raw_fmt->width = encoded_fmt->width;
-	raw_fmt->height = encoded_fmt->height;
+	hantro_reset_fmt(&raw_fmt, raw_vpu_fmt);
+	raw_fmt.width = encoded_fmt->width;
+	raw_fmt.height = encoded_fmt->height;
 	if (ctx->is_encoder)
-		hantro_set_fmt_out(ctx, raw_fmt);
+		hantro_set_fmt_out(ctx, &raw_fmt);
 	else
-		hantro_set_fmt_cap(ctx, raw_fmt);
+		hantro_set_fmt_cap(ctx, &raw_fmt);
 }
 
 void hantro_reset_fmts(struct hantro_ctx *ctx)
-- 
2.34.1