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[177.4.161.87]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-12de321df36sm3336852c88.7.2026.04.29.06.20.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 29 Apr 2026 06:20:13 -0700 (PDT) From: =?utf-8?q?C=C3=A1ssio_Gabriel?= Subject: [PATCH 0/2] ALSA: usb-audio: Fix stale quirk control caches after write failures Date: Wed, 29 Apr 2026 10:20:00 -0300 Message-Id: <20260429-alsa-usb-quirks-cache-rollback-v1-0-01b35c688b80@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit X-B4-Tracking: v=1; b=H4sIAAAAAAAC/yXNTQ6CQAxA4auQrm0yjPgTr2JcdEqRygRk6hgSw t0ddflt3lvBJKkYXKoVkrzVdBoL6l0F3NN4F9S2GLzzR9fUZ6RohNkCzlnTYMjEvWCaYgzEAzZ 7cid38J33DCXyTNLp8htcb39bDg/h17cK2/YBE6Q4joIAAAA= X-Change-ID: 20260418-alsa-usb-quirks-cache-rollback-43a07052f22c To: Takashi Iwai Cc: Thomas Ebeling , Ian Douglas Scott , Jaroslav Kysela , linux-sound@vger.kernel.org, linux-kernel@vger.kernel.org, =?utf-8?q?C=C3=A1ssio_Gabriel?= , stable@vger.kernel.org X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1453; i=cassiogabrielcontato@gmail.com; h=from:subject:message-id; bh=V+z3lB4+pCRWf3agDWSa+KADY1fFSo/WBirj1hovzuM=; b=owGbwMvMwCV2IdZeKur/u2bG02pJDJmfWLs0PcQW2ih92uabLqp6NUTi/tcfdbzmxzh3vjCc8 nN/yNO/HaUsDGJcDLJiiiyrkxZZ7ul6cLU+boUHzBxWJpAhDFycAjCRtwEMfwUYklX2XOfZMTFb YV3+TIG6F9snhS+9fm65IfeTLY93lB5k+B8Zymu/nfGZD2tidXsz73+9y8pV9otW5oVPu3zY5Oe yL1wA X-Developer-Key: i=cassiogabrielcontato@gmail.com; a=openpgp; fpr=AB62A239BC8AE0D57F5EA848D05D3F1A5AFFEE83 This series fixes stale software cache handling in several usb-audio mixer quirks. A number of quirk callbacks update kcontrol->private_value before issuing vendor or class writes. When such a write fails, the driver can keep reporting and later replaying a value the device never accepted, because the corresponding get and resume paths consume the cached state. - Patch 1 fixes the simple single-write quirk callbacks by restoring the previous cache on error. - Patch 2 fixes the RME Babyface Pro packed-state callbacks by updating the cache only after a successful write, since those helpers already take explicit arguments and do not need private_value to be updated before the USB request. The split keeps the generic quirk fixes separate from the Babyface Pro packed-state logic and keeps each patch tied to its own introducing bug. Signed-off-by: Cássio Gabriel --- Cássio Gabriel (2): ALSA: usb-audio: Roll back quirk control caches on write errors ALSA: usb-audio: Update Babyface Pro control caches only after successful writes sound/usb/mixer_quirks.c | 61 +++++++++++++++++++++++++++++++++++++----------- 1 file changed, 47 insertions(+), 14 deletions(-) --- base-commit: 7b04e87c2a10db9c65b3133949bbe1b738b6ed7e change-id: 20260418-alsa-usb-quirks-cache-rollback-43a07052f22c Best regards, -- Cássio Gabriel