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Fri, 06 Feb 2026 05:39:37 -0800 (PST) Received: from localhost ([196.207.164.177]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-43629744ec6sm6910737f8f.35.2026.02.06.05.39.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Feb 2026 05:39:37 -0800 (PST) Date: Fri, 6 Feb 2026 16:39:34 +0300 From: Dan Carpenter To: Peter Ujfalusi Cc: Kai Vehmanen , Pierre-Louis Bossart , sound-open-firmware@alsa-project.org, linux-sound@vger.kernel.org, linux-kernel Subject: [bug report] ASoC: SOF: ipc4-control: Add support for generic bytes control Message-ID: 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=us-ascii Content-Disposition: inline In-Reply-To: [ Smatch checking is paused while we raise funding. #SadFace https://lore.kernel.org/all/aTaiGSbWZ9DJaGo7@stanley.mountain/ -dan ] Hello Peter Ujfalusi, Commit 2a28b5240f2b ("ASoC: SOF: ipc4-control: Add support for generic bytes control") from Dec 17, 2025 (linux-next), leads to the following Smatch static checker warning: sound/soc/sof/ipc4-control.c:365 sof_ipc4_refresh_bytes_control() warn: missing error code here? '_dev_err()' failed. 'ret' = '0' sound/soc/sof/ipc4-control.c 324 static int 325 sof_ipc4_refresh_bytes_control(struct snd_sof_control *scontrol, bool lock) 326 { 327 struct sof_ipc4_control_data *cdata = scontrol->ipc_control_data; 328 struct snd_soc_component *scomp = scontrol->scomp; 329 struct sof_ipc4_control_msg_payload *msg_data; 330 struct sof_abi_hdr *data = cdata->data; 331 struct sof_ipc4_msg *msg = &cdata->msg; 332 size_t data_size; 333 int ret = 0; 334 335 if (!scontrol->comp_data_dirty) 336 return 0; 337 338 if (!pm_runtime_active(scomp->dev)) 339 return 0; 340 341 data_size = scontrol->max_size - sizeof(*data); 342 if (data_size < sizeof(*msg_data)) 343 data_size = sizeof(*msg_data); 344 345 msg_data = kzalloc(data_size, GFP_KERNEL); 346 if (!msg_data) 347 return -ENOMEM; 348 349 msg->extension = SOF_IPC4_MOD_EXT_MSG_PARAM_ID(data->type); 350 351 msg_data->id = cdata->index; 352 msg_data->num_elems = 0; /* ignored for bytes */ 353 354 msg->data_ptr = msg_data; 355 msg->data_size = data_size; 356 357 scontrol->comp_data_dirty = false; 358 ret = sof_ipc4_set_get_kcontrol_data(scontrol, false, lock); 359 if (!ret) { 360 if (msg->data_size > scontrol->max_size - sizeof(*data)) { 361 dev_err(scomp->dev, 362 "%s: no space for data in %s (%zu, %zu)\n", 363 __func__, scontrol->name, msg->data_size, 364 scontrol->max_size - sizeof(*data)); --> 365 goto out; ret = -EINVAL; 366 } 367 368 data->size = msg->data_size; 369 scontrol->size = sizeof(*cdata) + sizeof(*data) + data->size; 370 memcpy(data->data, msg->data_ptr, data->size); 371 } else { 372 dev_err(scomp->dev, "Failed to read control data for %s\n", 373 scontrol->name); 374 scontrol->comp_data_dirty = true; 375 } 376 377 out: 378 msg->data_ptr = NULL; 379 msg->data_size = 0; 380 381 kfree(msg_data); 382 383 return ret; 384 } regards, dan carpenter