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drm/omap: Fix runtime PM imbalance on error

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pm_runtime_get_sync() increments the runtime PM usage counter
even when it returns an error code. However, users of its
direct wrappers in omapdrm assume that PM usage counter will
not change on error. Thus a pairing decrement is needed on
the error handling path for these wrappers to keep the counter
balanced.

Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200822065743.13671-1-dinghao.liu@zju.edu.cn
This commit is contained in:
Dinghao Liu
2020-08-22 14:57:33 +08:00
committed by Tomi Valkeinen
parent 1b409fda60
commit a5d704d332
6 changed files with 26 additions and 14 deletions
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7
drivers/gpu/drm/omapdrm/dss/dispc.c
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@@ -653,8 +653,11 @@ int dispc_runtime_get(struct dispc_device *dispc)
DSSDBG("dispc_runtime_get\n");
r = pm_runtime_get_sync(&dispc->pdev->dev);
WARN_ON(r < 0);
return r < 0 ? r : 0;
if (WARN_ON(r < 0)) {
pm_runtime_put_noidle(&dispc->pdev->dev);
return r;
}
return 0;
}
void dispc_runtime_put(struct dispc_device *dispc)