linux-kernel - [PATCH] drm/bridge: it6505: Fix return value check for pm_runtime_get

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Message-Id: <20221027032149.2739912-1-treapking@chromium.org>
Date:   Thu, 27 Oct 2022 11:21:49 +0800
From:   Pin-yen Lin <treapking@...omium.org>
To:     Andrzej Hajda <andrzej.hajda@...el.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Robert Foss <robert.foss@...aro.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Cc:     Pin-yen Lin <treapking@...omium.org>, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org
Subject: [PATCH] drm/bridge: it6505: Fix return value check for pm_runtime_get_sync

`pm_runtime_get_sync` may return 1 on success. Fix the `if` statement
here to make the code less confusing, even though additional calls to
`it6505_poweron` doesn't break anything when it's already powered.

This was reported by Dan Carpenter <dan.carpenter@...cle.com> in
https://lore.kernel.org/all/Y1fMCs6VnxbDcB41@kili/

Fixes: 10517777d302 ("drm/bridge: it6505: Adapt runtime power management framework")
Signed-off-by: Pin-yen Lin <treapking@...omium.org>

---

 drivers/gpu/drm/bridge/ite-it6505.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/ite-it6505.c b/drivers/gpu/drm/bridge/ite-it6505.c
index b929fc766e24..21a9b8422bda 100644
--- a/drivers/gpu/drm/bridge/ite-it6505.c
+++ b/drivers/gpu/drm/bridge/ite-it6505.c
@@ -2699,7 +2699,7 @@ static void it6505_extcon_work(struct work_struct *work)
 		 * pm_runtime_force_resume re-enables runtime power management.
 		 * Handling the error here to make sure the bridge is powered on.
 		 */
-		if (ret)
+		if (ret < 0)
 			it6505_poweron(it6505);
 
 		complete_all(&it6505->extcon_completion);
-- 
2.38.0.135.g90850a2211-goog