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Sun, 08 Nov 2026 21:16:23 -0800 (PST) Received: from localhost.localdomain ([183.96.175.225]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-1b37314826asm11395635c88.3.2026.11.08.21.16.20 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Sun, 08 Nov 2026 21:16:23 -0800 (PST) From: Joonho Lee To: linux-sound@vger.kernel.org Cc: tiwai@suse.com, perex@perex.cz, anton.yakovlev@opensynergy.com, mst@redhat.com, virtualization@lists.linux.dev, linux-kernel@vger.kernel.org, corbet@lwn.net, skhan@linuxfoundation.org, rdunlap@infradead.org, linux-doc@vger.kernel.org Subject: [PATCH v22 00/13] ALSA: virtio: validate PCM ACK and prepare completion Date: Mon, 9 Nov 2026 14:16:05 +0900 Message-ID: <20261109051618.22506-1-mynameisjune111@gmail.com> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20261108235457.12688-1-mynameisjune111@gmail.com> References: <20261108235457.12688-1-mynameisjune111@gmail.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This cumulative v22 update adds an optional linked-prepare completion hook and validates playback ACK accounting before indirect transfer. The core hook runs after all linked prepare actions and post-actions succeed. If an action fails, callbacks cover only the attempted prefix; the core moves opted-in members in that prefix to SETUP before calling back. Pre-action failures and standalone RESET do not invoke the hook. Drivers that leave it unset retain existing prepare-failure behavior. Virtio uses the hook to keep ACK admission closed through the core pointer reset. Patch 5 also returns -EBADFD for an ACK on an already XRUN member, avoiding a second linked-group XRUN request. Playback ACK validates normalized boundary deltas, frame-to-byte geometry, ring indices, signed ready counters, and total queued bytes before the indirect transfer helper mutates its cursor. An invalid paused ACK returns -EBADFD without starting a linked XRUN. Validation: The exact-source ARM64 W=1/KASAN/LOCKDEP build passed; final-r4 snd-pcm and virtio_snd modules match the previous build, and Image executable sections and System.map match. The W=1 stage 04–13 build chain passed without warnings or errors. The v22-only checkpatch delta reported zero errors, warnings, or checks. The bounded playback ACK helper passed 23 candidate-only cases. The prepare-completion QEMU probe passed six lifecycle cases, including a later member's OPEN pre-action abort. Normal playback passed in QEMU with RW and MMAP, including prepare, fill, START, supported pause/resume, drain, drop, and reopen. Four ordinary/staged capture paths (RW/MMAP) passed with 14 oracle captures, including post-reset capture checks. The prepare-ordering diagnosis comes from static source inspection; no baseline runtime test was run. KCSAN and physical-device testing remain pending.