linux-kernel - [PATCH v2 1/3] media: i2c: dw9768: Fix pm_runtime_set

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Message-ID: <20241101094050.2421038-2-ruanjinjie@huawei.com>
Date: Fri, 1 Nov 2024 17:40:48 +0800
From: Jinjie Ruan <ruanjinjie@...wei.com>
To: <sakari.ailus@...ux.intel.com>, <mchehab@...nel.org>, <ming.qian@....com>,
	<eagle.zhou@....com>, <stanimir.k.varbanov@...il.com>,
	<quic_vgarodia@...cinc.com>, <bryan.odonoghue@...aro.org>,
	<shijie.qin@....com>, <hverkuil-cisco@...all.nl>,
	<linux-media@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-msm@...r.kernel.org>
CC: <chenridong@...wei.com>, <ruanjinjie@...wei.com>
Subject: [PATCH v2 1/3] media: i2c: dw9768: Fix pm_runtime_set_suspended() with runtime pm enabled

It is not valid to call pm_runtime_set_suspended() and
pm_runtime_set_active() for devices with runtime PM enabled because it
returns -EAGAIN if it is enabled already and working. So, adjust the
order to fix it.

Cc: stable@...r.kernel.org
Fixes: 5f9a089b6de3 ("dw9768: Enable low-power probe on ACPI")
Suggested-by: Sakari Ailus <sakari.ailus@...ux.intel.com>
Signed-off-by: Jinjie Ruan <ruanjinjie@...wei.com>
---
v2:
- !pm_runtime_enabled() check -> !IS_ENABLED(CONFIG_PM).
- Add suggested-by.
- Cc stable.
---
 drivers/media/i2c/dw9768.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/media/i2c/dw9768.c b/drivers/media/i2c/dw9768.c
index 18ef2b35c9aa..87a7c3ceeb11 100644
--- a/drivers/media/i2c/dw9768.c
+++ b/drivers/media/i2c/dw9768.c
@@ -471,10 +471,9 @@ static int dw9768_probe(struct i2c_client *client)
 	 * to be powered on in an ACPI system. Similarly for power off in
 	 * remove.
 	 */
-	pm_runtime_enable(dev);
 	full_power = (is_acpi_node(dev_fwnode(dev)) &&
 		      acpi_dev_state_d0(dev)) ||
-		     (is_of_node(dev_fwnode(dev)) && !pm_runtime_enabled(dev));
+		     (is_of_node(dev_fwnode(dev)) && !IS_ENABLED(CONFIG_PM));
 	if (full_power) {
 		ret = dw9768_runtime_resume(dev);
 		if (ret < 0) {
@@ -484,6 +483,7 @@ static int dw9768_probe(struct i2c_client *client)
 		pm_runtime_set_active(dev);
 	}
 
+	pm_runtime_enable(dev);
 	ret = v4l2_async_register_subdev(&dw9768->sd);
 	if (ret < 0) {
 		dev_err(dev, "failed to register V4L2 subdev: %d", ret);
@@ -495,12 +495,12 @@ static int dw9768_probe(struct i2c_client *client)
 	return 0;
 
 err_power_off:
+	pm_runtime_disable(dev);
 	if (full_power) {
 		dw9768_runtime_suspend(dev);
 		pm_runtime_set_suspended(dev);
 	}
 err_clean_entity:
-	pm_runtime_disable(dev);
 	media_entity_cleanup(&dw9768->sd.entity);
 err_free_handler:
 	v4l2_ctrl_handler_free(&dw9768->ctrls);
@@ -517,12 +517,12 @@ static void dw9768_remove(struct i2c_client *client)
 	v4l2_async_unregister_subdev(&dw9768->sd);
 	v4l2_ctrl_handler_free(&dw9768->ctrls);
 	media_entity_cleanup(&dw9768->sd.entity);
+	pm_runtime_disable(dev);
 	if ((is_acpi_node(dev_fwnode(dev)) && acpi_dev_state_d0(dev)) ||
-	    (is_of_node(dev_fwnode(dev)) && !pm_runtime_enabled(dev))) {
+	    (is_of_node(dev_fwnode(dev)) && !IS_ENABLED(CONFIG_PM))) {
 		dw9768_runtime_suspend(dev);
 		pm_runtime_set_suspended(dev);
 	}
-	pm_runtime_disable(dev);
 }
 
 static const struct of_device_id dw9768_of_table[] = {
-- 
2.34.1