From: Geert Uytterhoeven geert+renesas@glider.be
[ Upstream commit d5a3c7a4536e1329a758e14340efd0e65252bd3d ]
Runtime PM should be enabled before calling pwmchip_add(), as PWM users can appear immediately after the PWM chip has been added. Likewise, Runtime PM should always be disabled after the removal of the PWM chip, even if the latter failed.
Fixes: 99b82abb0a35b073 ("pwm: Add Renesas TPU PWM driver") Signed-off-by: Geert Uytterhoeven geert+renesas@glider.be Signed-off-by: Thierry Reding thierry.reding@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pwm/pwm-renesas-tpu.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/drivers/pwm/pwm-renesas-tpu.c b/drivers/pwm/pwm-renesas-tpu.c index 29267d12fb4c9..9c7962f2f0aa4 100644 --- a/drivers/pwm/pwm-renesas-tpu.c +++ b/drivers/pwm/pwm-renesas-tpu.c @@ -423,16 +423,17 @@ static int tpu_probe(struct platform_device *pdev) tpu->chip.base = -1; tpu->chip.npwm = TPU_CHANNEL_MAX;
+ pm_runtime_enable(&pdev->dev); + ret = pwmchip_add(&tpu->chip); if (ret < 0) { dev_err(&pdev->dev, "failed to register PWM chip\n"); + pm_runtime_disable(&pdev->dev); return ret; }
dev_info(&pdev->dev, "TPU PWM %d registered\n", tpu->pdev->id);
- pm_runtime_enable(&pdev->dev); - return 0; }
@@ -442,12 +443,10 @@ static int tpu_remove(struct platform_device *pdev) int ret;
ret = pwmchip_remove(&tpu->chip); - if (ret) - return ret;
pm_runtime_disable(&pdev->dev);
- return 0; + return ret; }
#ifdef CONFIG_OF