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Wed, 30 Sep 2026 04:15:46 -0700 (PDT) Received: from nugod-NUC15CRHU5.tail9f095a.ts.net ([218.237.104.87]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-88726c07f4asm634108b3a.59.2026.09.30.04.15.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 30 Sep 2026 04:15:40 -0700 (PDT) From: HyeongJun An To: Mark Brown Cc: Jaroslav Kysela , Takashi Iwai , Shuah Khan , linux-sound@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, HyeongJun An Subject: [PATCH 0/2] selftests/alsa: Catch writes that silently change other controls Date: Wed, 30 Sep 2026 20:15:32 +0900 Message-ID: <20260930111534.3782264-1-sammiee5311@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Mark asked for this in the es8316 thread [1]: have mixer-test check for other controls changing when one is written. Patch 2 adds that. Patch 1 fixes a bug that testing patch 2 turned up. With a driver that notifies a neighbour with a value event, wait_for_event() returns on the neighbour's event and the next test reports a spurious one. The cost is two extra writes per control and a read of every other control on the card after each. On the two cards here, 39 controls in all, the run time does not move. I have no card with hundreds of controls to measure against the 45 second kselftest timeout. [1] https://lore.kernel.org/all/0fefbfe1-021b-46b2-8945-15956e75e37f@sirena.org.uk/ HyeongJun An (2): selftests/alsa: Do not take another control's event as our own selftests/alsa: Check that a write does not silently change other controls tools/testing/selftests/alsa/mixer-test.c | 235 +++++++++++++++++++++- 1 file changed, 234 insertions(+), 1 deletion(-) -- 2.43.0