linux-kernel - [PATCH] drm/mediatek: fix mtk_hdmi_setup_vendor_specific

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Date:   Tue, 21 Mar 2017 16:27:03 +0800
From:   Nickey Yang <nickey.yang@...k-chips.com>
To:     ck.hu@...iatek.com, p.zabel@...gutronix.de, airlied@...ux.ie,
        matthias.bgg@...il.com
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        dri-devel@...ts.freedesktop.org, jie.qiu@...iatek.com,
        junzhi.zhao@...iatek.com, Nickey Yang <nickey.yang@...k-chips.com>
Subject: [PATCH] drm/mediatek: fix mtk_hdmi_setup_vendor_specific_infoframe mistake

mtk_hdmi_setup_vendor_specific_infoframe will return before handle
mtk_hdmi_hw_send_info_frame.Because hdmi_vendor_infoframe_pack
returns the number of bytes packed into the binary buffer or
a negative error code on failure.
So correct it.

Signed-off-by: Nickey Yang <nickey.yang@...k-chips.com>
---
 drivers/gpu/drm/mediatek/mtk_hdmi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
index c262512..b43aa29 100644
--- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
+++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
@@ -1062,7 +1062,7 @@ static int mtk_hdmi_setup_vendor_specific_infoframe(struct mtk_hdmi *hdmi,
 	}
 
 	err = hdmi_vendor_infoframe_pack(&frame, buffer, sizeof(buffer));
-	if (err) {
+	if (err < 0) {
 		dev_err(hdmi->dev, "Failed to pack vendor infoframe: %zd\n",
 			err);
 		return err;
-- 
1.9.1