From: Uwe Kleine-König Date: Mon, 31 Jul 2023 16:54:54 +0000 (+0200) Subject: crypto: stm32 - Properly handle pm_runtime_get failing X-Git-Tag: v6.6.7~2012^2~64 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=aec48805163338f8413118796c1dd035661b9140;p=platform%2Fkernel%2Flinux-starfive.git crypto: stm32 - Properly handle pm_runtime_get failing If pm_runtime_get() (disguised as pm_runtime_resume_and_get()) fails, this means the clk wasn't prepared and enabled. Returning early in this case however is wrong as then the following resource frees are skipped and this is never catched up. So do all the cleanups but clk_disable_unprepare(). Also don't emit a warning, as stm32_hash_runtime_resume() already emitted one. Note that the return value of stm32_hash_remove() is mostly ignored by the device core. The only effect of returning zero instead of an error value is to suppress another warning in platform_remove(). So return 0 even if pm_runtime_resume_and_get() failed. Fixes: 8b4d566de6a5 ("crypto: stm32/hash - Add power management support") Signed-off-by: Uwe Kleine-König Signed-off-by: Herbert Xu --- diff --git a/drivers/crypto/stm32/stm32-hash.c b/drivers/crypto/stm32/stm32-hash.c index 88a186c..75d281e 100644 --- a/drivers/crypto/stm32/stm32-hash.c +++ b/drivers/crypto/stm32/stm32-hash.c @@ -2121,9 +2121,7 @@ static int stm32_hash_remove(struct platform_device *pdev) if (!hdev) return -ENODEV; - ret = pm_runtime_resume_and_get(hdev->dev); - if (ret < 0) - return ret; + ret = pm_runtime_get_sync(hdev->dev); stm32_hash_unregister_algs(hdev); @@ -2139,7 +2137,8 @@ static int stm32_hash_remove(struct platform_device *pdev) pm_runtime_disable(hdev->dev); pm_runtime_put_noidle(hdev->dev); - clk_disable_unprepare(hdev->clk); + if (ret >= 0) + clk_disable_unprepare(hdev->clk); return 0; }