linux-kernel - [PATCH 08/10] drm/msm: fix workqueue leak on bind errors

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Message-Id: <20230306100722.28485-9-johan+linaro@kernel.org>
Date:   Mon,  6 Mar 2023 11:07:20 +0100
From:   Johan Hovold <johan+linaro@...nel.org>
To:     Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc:     Sean Paul <sean@...rly.run>, David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>, linux-arm-msm@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org,
        Johan Hovold <johan+linaro@...nel.org>, stable@...r.kernel.org
Subject: [PATCH 08/10] drm/msm: fix workqueue leak on bind errors

Make sure to destroy the workqueue also in case of early errors during
bind (e.g. a subcomponent failing to bind).

Since commit c3b790ea07a1 ("drm: Manage drm_mode_config_init with
drmm_") the mode config will be freed when the drm device is released
also when using the legacy interface, but add an explicit cleanup for
consistency and to facilitate backporting.

Fixes: 060530f1ea67 ("drm/msm: use componentised device support")
Cc: stable@...r.kernel.org      # 3.15
Cc: Rob Clark <robdclark@...il.com>
Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
---
 drivers/gpu/drm/msm/msm_drv.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index ac3b77dbfacc..73c597565f99 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -458,7 +458,7 @@ static int msm_drm_init(struct device *dev, const struct drm_driver *drv)
 
 	ret = msm_init_vram(ddev);
 	if (ret)
-		goto err_put_dev;
+		goto err_cleanup_mode_config;
 
 	/* Bind all our sub-components: */
 	ret = component_bind_all(dev, ddev);
@@ -563,6 +563,9 @@ static int msm_drm_init(struct device *dev, const struct drm_driver *drv)
 
 err_deinit_vram:
 	msm_deinit_vram(ddev);
+err_cleanup_mode_config:
+	drm_mode_config_cleanup(ddev);
+	destroy_workqueue(priv->wq);
 err_put_dev:
 	drm_dev_put(ddev);
 
-- 
2.39.2