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Date: Fri, 9 Apr 2021 16:22:25 +0800 From: Dinghao Liu <dinghao.liu@....edu.cn> To: dinghao.liu@....edu.cn, kjlu@....edu Cc: Rui Miguel Silva <rmfrfs@...il.com>, Steve Longerbeam <slongerbeam@...il.com>, Philipp Zabel <p.zabel@...gutronix.de>, Mauro Carvalho Chehab <mchehab@...nel.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>, Pengutronix Kernel Team <kernel@...gutronix.de>, Fabio Estevam <festevam@...il.com>, NXP Linux Team <linux-imx@....com>, linux-media@...r.kernel.org, linux-staging@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: [PATCH] [v2] media: imx: imx7-mipi-csis: Fix runtime PM imbalance in mipi_csis_s_stream When v4l2_subdev_call() fails, a pairing PM usage counter decrement is needed to keep the counter balanced. It's the same for the following error paths in case 'enable' is on. Signed-off-by: Dinghao Liu <dinghao.liu@....edu.cn> --- Changelog: v2: - Use pm_runtime_put() to balance the refcount. --- drivers/staging/media/imx/imx7-mipi-csis.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/staging/media/imx/imx7-mipi-csis.c b/drivers/staging/media/imx/imx7-mipi-csis.c index a01a7364b4b9..6f3e8a15e7c4 100644 --- a/drivers/staging/media/imx/imx7-mipi-csis.c +++ b/drivers/staging/media/imx/imx7-mipi-csis.c @@ -628,7 +628,7 @@ static int mipi_csis_s_stream(struct v4l2_subdev *mipi_sd, int enable) } ret = v4l2_subdev_call(state->src_sd, core, s_power, 1); if (ret < 0) - return ret; + goto pm_put; } mutex_lock(&state->lock); @@ -657,7 +657,8 @@ static int mipi_csis_s_stream(struct v4l2_subdev *mipi_sd, int enable) unlock: mutex_unlock(&state->lock); - if (!enable) +pm_put: + if (!enable || (ret < 0)) pm_runtime_put(&state->pdev->dev); return ret; -- 2.17.1
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