linux-kernel - [PATCH] coresight: tmc-etr: Don't fail probe when non-secure access is disabled

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Message-ID: <20230825233930.1875819-1-yabinc@google.com>
Date:   Fri, 25 Aug 2023 16:39:30 -0700
From:   Yabin Cui <yabinc@...gle.com>
To:     Suzuki K Poulose <suzuki.poulose@....com>,
        Mike Leach <mike.leach@...aro.org>,
        James Clark <james.clark@....com>, Leo Yan <leo.yan@...aro.org>
Cc:     Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        coresight@...ts.linaro.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Yabin Cui <yabinc@...gle.com>
Subject: [PATCH] coresight: tmc-etr: Don't fail probe when non-secure access
 is disabled

Because the non-secure access can be enabled later on some devices.

Signed-off-by: Yabin Cui <yabinc@...gle.com>
---
 drivers/hwtracing/coresight/coresight-tmc-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwtracing/coresight/coresight-tmc-core.c b/drivers/hwtracing/coresight/coresight-tmc-core.c
index c106d142e632..5ebfd12b627b 100644
--- a/drivers/hwtracing/coresight/coresight-tmc-core.c
+++ b/drivers/hwtracing/coresight/coresight-tmc-core.c
@@ -370,7 +370,7 @@ static int tmc_etr_setup_caps(struct device *parent, u32 devid, void *dev_caps)
 	struct tmc_drvdata *drvdata = dev_get_drvdata(parent);
 
 	if (!tmc_etr_has_non_secure_access(drvdata))
-		return -EACCES;
+		dev_warn(parent, "TMC ETR doesn't have non-secure access\n");
 
 	/* Set the unadvertised capabilities */
 	tmc_etr_init_caps(drvdata, (u32)(unsigned long)dev_caps);
-- 
2.42.0.rc1.204.g551eb34607-goog