linux-kernel - [PATCH v2] media: cros-ec-cec: do not bail on device_init

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Date:   Mon, 22 Jun 2020 13:46:36 +0200
From:   Dariusz Marcinkiewicz <darekm@...gle.com>
To:     linux-media@...r.kernel.org
Cc:     narmstrong@...libre.com, Dariusz Marcinkiewicz <darekm@...gle.com>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Benson Leung <bleung@...omium.org>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        Guenter Roeck <groeck@...omium.org>,
        Lee Jones <lee.jones@...aro.org>,
        Sebastian Reichel <sre@...nel.org>,
        Dariusz Marcinkiewicz <darekm@...omium.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2] media: cros-ec-cec: do not bail on device_init_wakeup failure

Do not fail probing when device_init_wakeup fails.

device_init_wakeup fails when the device is already enabled as wakeup
device. Hence, the driver fails to probe the device if:
- The device has already been enabled for wakeup (by e.g. sysfs)
- The driver has been unloaded and is being loaded again.

This goal of the patch is to fix the above cases.

Overwhelming majority of the drivers do not check device_init_wakeup
return code.

v2: add Fixes tags

Fixes: cd70de2d356ee ("media: platform: Add ChromeOS EC CEC driver")
Signed-off-by: Dariusz Marcinkiewicz <darekm@...gle.com>
---
 drivers/media/cec/platform/cros-ec/cros-ec-cec.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/drivers/media/cec/platform/cros-ec/cros-ec-cec.c b/drivers/media/cec/platform/cros-ec/cros-ec-cec.c
index 0e7e2772f08f..2d95e16cd248 100644
--- a/drivers/media/cec/platform/cros-ec/cros-ec-cec.c
+++ b/drivers/media/cec/platform/cros-ec/cros-ec-cec.c
@@ -277,11 +277,7 @@ static int cros_ec_cec_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, cros_ec_cec);
 	cros_ec_cec->cros_ec = cros_ec;
 
-	ret = device_init_wakeup(&pdev->dev, 1);
-	if (ret) {
-		dev_err(&pdev->dev, "failed to initialize wakeup\n");
-		return ret;
-	}
+	device_init_wakeup(&pdev->dev, 1);
 
 	cros_ec_cec->adap = cec_allocate_adapter(&cros_ec_cec_ops, cros_ec_cec,
 						 DRV_NAME,
-- 
2.27.0.111.gc72c7da667-goog