linux-kernel - [PATCH 2/4] intel_th: Remove an unused exit point from intel_th

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Message-Id: <20210621151246.31891-3-alexander.shishkin@linux.intel.com>
Date:   Mon, 21 Jun 2021 18:12:44 +0300
From:   Alexander Shishkin <alexander.shishkin@...ux.intel.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH 2/4] intel_th: Remove an unused exit point from intel_th_remove()

From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>

As described in the added comment device_for_each_child() never returns
a non-zero value. So remove the corresponding error check.

This simplifies the quest to make struct bus_type::remove() return void.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
Signed-off-by: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/hwtracing/intel_th/core.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/hwtracing/intel_th/core.c b/drivers/hwtracing/intel_th/core.c
index 24d0c974bfd5..4bf025ef2031 100644
--- a/drivers/hwtracing/intel_th/core.c
+++ b/drivers/hwtracing/intel_th/core.c
@@ -100,16 +100,18 @@ static int intel_th_remove(struct device *dev)
 	struct intel_th_driver *thdrv = to_intel_th_driver(dev->driver);
 	struct intel_th_device *thdev = to_intel_th_device(dev);
 	struct intel_th_device *hub = to_intel_th_hub(thdev);
-	int err;
 
 	if (thdev->type == INTEL_TH_SWITCH) {
 		struct intel_th *th = to_intel_th(hub);
 		int i, lowest;
 
-		/* disconnect outputs */
-		err = device_for_each_child(dev, thdev, intel_th_child_remove);
-		if (err)
-			return err;
+		/*
+		 * disconnect outputs
+		 *
+		 * intel_th_child_remove returns 0 unconditionally, so there is
+		 * no need to check the return value of device_for_each_child.
+		 */
+		device_for_each_child(dev, thdev, intel_th_child_remove);
 
 		/*
 		 * Remove outputs, that is, hub's children: they are created
-- 
2.30.2