linux-kernel - [PATCH v1] coresight: Drop double check for ACPI companion device

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Message-Id: <20200529133210.20566-1-andriy.shevchenko@linux.intel.com>
Date:   Fri, 29 May 2020 16:32:10 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Mathieu Poirier <mathieu.poirier@...aro.org>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Mike Leach <mike.leach@...aro.org>,
        linux-kernel@...r.kernel.org,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v1] coresight: Drop double check for ACPI companion device

acpi_dev_get_resources() does perform the NULL pointer check against
ACPI companion device which is given as function parameter. Thus,
there is no need to duplicate this check in the caller.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/hwtracing/coresight/coresight-stm.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-stm.c b/drivers/hwtracing/coresight/coresight-stm.c
index b908ca104645..673d2f56ed1e 100644
--- a/drivers/hwtracing/coresight/coresight-stm.c
+++ b/drivers/hwtracing/coresight/coresight-stm.c
@@ -727,8 +727,6 @@ static int acpi_stm_get_stimulus_area(struct device *dev, struct resource *res)
 
 	struct acpi_device *adev = ACPI_COMPANION(dev);
 
-	if (!adev)
-		return -ENODEV;
 	rc = acpi_dev_get_resources(adev, &res_list, NULL, NULL);
 	if (rc < 0)
 		return rc;
-- 
2.26.2