[PATCH] hwspinlock: omap: Handle devm_pm_runtime_enable() errors

[Haotian Zhang]

Although unlikely, devm_pm_runtime_enable() can fail due to memory
allocations. Without proper error handling, the subsequent
pm_runtime_resume_and_get() call may operate on incorrectly
initialized runtime PM state.

Add error handling to check the return value of
devm_pm_runtime_enable() and return on failure.

Fixes: 25f7d74d4514 ("hwspinlock: omap: Use devm_pm_runtime_enable() helper")
Signed-off-by: Haotian Zhang <vu...@iscas.ac.cn>
---
 drivers/hwspinlock/omap_hwspinlock.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/hwspinlock/omap_hwspinlock.c 
b/drivers/hwspinlock/omap_hwspinlock.c
index 27b47b8623c0..2d8de835bc24 100644
--- a/drivers/hwspinlock/omap_hwspinlock.c
+++ b/drivers/hwspinlock/omap_hwspinlock.c
@@ -88,7 +88,9 @@ static int omap_hwspinlock_probe(struct platform_device *pdev)
         * make sure the module is enabled and clocked before reading
         * the module SYSSTATUS register
         */
-       devm_pm_runtime_enable(&pdev->dev);
+       ret = devm_pm_runtime_enable(&pdev->dev);
+       if (ret)
+               return ret;
        ret = pm_runtime_resume_and_get(&pdev->dev);
        if (ret < 0)
                return ret;
-- 
2.50.1.windows.1