From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2A516261B9E; Sat, 30 May 2026 17:48:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780163304; cv=none; b=laBkl9ninGo1uI0mZ+e2zqmz/5WC13vHGgL6FgMmd00mC2i0f8ynUfOXYmqLpZLUvs5xRcs386+NebtmcUcLlqbICjMTMTKa0vvnItt5miUOzkl/xXTOLB0yAE6F+bysfUvri4v6xx8HTsxOcE7vwxZwbC9P6RePAfy7B1djlEs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780163304; c=relaxed/simple; bh=SL4gxPI7OTfCtgfLKMBG2VQx+7IxxlvPWytt1OeAxug=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=M7DGkTGzWblTgaz+Ga/qnbJTUbkcOVlDdCARQvMCAzs4qqaMggq/CTeKuaqG0pSK+qH2yMW7ZoR+jXJ6Q/p0nGd3/GHgiUQ1WPZ4uNbyTGQ1tmQ18SYs6b97P4xcQVf4Bl+6UsZSLcuASUSfyTc3t6cCFflp2gdmr7hYiuwDdE0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=V/Q0dfJf; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="V/Q0dfJf" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 703341F00893; Sat, 30 May 2026 17:48:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1780163303; bh=ycvtkGWTsi4Ca1MDK+OA0LO0BgB9DroLiyhfVZ20xhs=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=V/Q0dfJfCjcuVaYdBZbO5EeoTKgWUekBqTMofwbzF4dsqiLN8nH3hZZNljwZ2QTZ2 HUdWR2YddxAaX3KG0zY4sexLmR0kwh/eOoztIexXEw6ZyRH8lb6Bc9PY3+Yr1LVotd ZOtJ/oBaf102BBF05YVak1FnZF3wJARTSuwO3c5w= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, =?UTF-8?q?C=C3=A1ssio=20Gabriel?= , Takashi Iwai Subject: [PATCH 5.15 217/776] ALSA: 6fire: Fix input volume change detection Date: Sat, 30 May 2026 17:58:51 +0200 Message-ID: <20260530160246.127580393@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260530160240.228940103@linuxfoundation.org> References: <20260530160240.228940103@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Cássio Gabriel commit dc88eef8f55e85e92d016cdf7e291f5560efd79b upstream. usb6fire_control_input_vol_put() stores the analog capture volume as a signed offset in rt->input_vol[] (-15..+15), but it compares the cached value against the user-visible mixer value (0..30) before subtracting 15. This mixes two domains in the change detection path. Since the runtime is zero-initialized, the visible default is 15; writing 0 right after probe is ignored, while writing 15 is reported as a change even though the cached value remains 0. Normalize the user value before comparing it with the cached offset. Fixes: 06bb4e743501 ("ALSA: snd-usb-6fire: add analog input volume control") Cc: stable@vger.kernel.org Signed-off-by: Cássio Gabriel Link: https://patch.msgid.link/20260416-alsa-6fire-input-volume-change-detection-v1-1-ec78299168df@gmail.com Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman --- sound/usb/6fire/control.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) --- a/sound/usb/6fire/control.c +++ b/sound/usb/6fire/control.c @@ -290,15 +290,17 @@ static int usb6fire_control_input_vol_pu struct snd_ctl_elem_value *ucontrol) { struct control_runtime *rt = snd_kcontrol_chip(kcontrol); + int vol0 = ucontrol->value.integer.value[0] - 15; + int vol1 = ucontrol->value.integer.value[1] - 15; int changed = 0; - if (rt->input_vol[0] != ucontrol->value.integer.value[0]) { - rt->input_vol[0] = ucontrol->value.integer.value[0] - 15; + if (rt->input_vol[0] != vol0) { + rt->input_vol[0] = vol0; rt->ivol_updated &= ~(1 << 0); changed = 1; } - if (rt->input_vol[1] != ucontrol->value.integer.value[1]) { - rt->input_vol[1] = ucontrol->value.integer.value[1] - 15; + if (rt->input_vol[1] != vol1) { + rt->input_vol[1] = vol1; rt->ivol_updated &= ~(1 << 1); changed = 1; }