linux-kernel - [PATCH 0/1] coresight: Fix TRCCONFIGR.QE sysfs interface

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Message-Id: <20220114173254.1876151-1-james.clark@arm.com>
Date:   Fri, 14 Jan 2022 17:32:53 +0000
From:   James Clark <james.clark@....com>
To:     mathieu.poirier@...aro.org, coresight@...ts.linaro.org
Cc:     suzuki.poulose@....com, James Clark <james.clark@....com>,
        Mike Leach <mike.leach@...aro.org>,
        Leo Yan <leo.yan@...aro.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 0/1] coresight: Fix TRCCONFIGR.QE sysfs interface

I was working on refactoring some of the magic numbers for the register
accesses and I saw this issue with programming one of the values.

I don't have any evidence that someone encountered it not working, probably
there is no hardware where QSUPP==0b10, or it just didn't get used yet.
But the issue is that this silently writes a reserved value even if the
user provided one was correct so it might ruin someones day if it ever
comes up.

It's a small change so I didn't see the harm in fixing it.

Applies to coresight/next f9809d565135

James Clark (1):
  coresight: Fix TRCCONFIGR.QE sysfs interface

 drivers/hwtracing/coresight/coresight-etm4x-sysfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

-- 
2.17.1