From patchwork Fri Jun 28 22:47:26 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Torokhov X-Patchwork-Id: 13716718 Received: from mail-pj1-f48.google.com (mail-pj1-f48.google.com [209.85.216.48]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 318F581ADB; Fri, 28 Jun 2024 22:47:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.48 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719614861; cv=none; b=i14HiMlxwejWANLDcxcwtg2ATXnE9jOnhInVO5+brRcqdHlw2FZgiXmluntmd5DxRb36R6HIMxOi6h0sdox0Bz/39Wx0AqBaJ+TXsxQtje5FI3W3fjZufTLUqckzDO+Tq8NLtAHqzTGsYC+JcNFgNpYTaOKZCsCLGgELW4WnKGw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719614861; c=relaxed/simple; bh=bxWyiBWYPW2+buNmHaUgN3u/vnNpNcPGkK464MtKleM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=JGW+nTTvTzLerYw0wLQofkzK0l3QGnHZEYchZpzSu9Vi5Pijd6n1h8htD7KKgtRGAdHXyQifKJRumDYDpEMrgp4GsRltsN5r58d/jJjGf0OU71JNvMMs86t43fJN/c/zLQjDZcmFGw7Ml7pwYfxfBWLacvziRmDVOaXukzwbZLs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=Bb+chhMb; arc=none smtp.client-ip=209.85.216.48 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Bb+chhMb" Received: by mail-pj1-f48.google.com with SMTP id 98e67ed59e1d1-2c7b3c513f9so743094a91.3; Fri, 28 Jun 2024 15:47:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1719614859; x=1720219659; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=grngmqCY15ZFkaN4yPlMDR3cMPW3TlCebrSNgkV3ENk=; b=Bb+chhMbmcEMyy/Q8sdQM17DpjBa9u+O4qNdRX5Xbj9sk/UXkpKhx6mfPm1f8aiDQN H6vsRCCL33e1b2SIJuYA6ph4AwUUJLZBW+IJtRJ9iPsldNHXUWU4lahwqqM0HHzFazKR Eqeb7i7uexB9tKChhp8VpkHgPxEYOzg9Zzh2TuVvo81nVSm6Bi8y3KhbkJvdTbMH2uKT 5UKewVvSEcGuaYYZJ5a5XAXqR6c0xZ0MAR3FJpP0LrgssJyYjlFbP33dR3vEx05QOHPF f+vBDeLsEKB/ypdA7uwsJoK/Wd3g5sbOumi0gBAevsKFQZ3Vm3mDFwLeygVqcXEtCAAA Vqqw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1719614859; x=1720219659; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=grngmqCY15ZFkaN4yPlMDR3cMPW3TlCebrSNgkV3ENk=; b=G0uUcWHUUUNXqmpfc4B5U+zVdN1lqjPNxmMpAHVOgAG4m2vfxrIBoEKlJ1u30J2e8A C/jzCzsCkv70zXFHodR92L5rSAJsama7LffpkImFexUYR3S8lHY+tAwAm/TKqx2OYkIv YryShXvx0kXrDH8lzOVTa9dc0Yl9icTuS9PVHPIoOV7TOgdi0DgBhHbJBdBphEKioF0F zONSGdbNqJBdcWv7cGf/E+zY3Wca+bo0T3EsTPrt+FGjiAWq2Rkt4c8svjSQ6Jj7Tkyu 5BhpJWCRT/Fd/HNZB6CVeduzE535qiAU0oYHmXd8sIkDLaHLbyZixXVvTzjdp6hPmfej qyTw== X-Gm-Message-State: AOJu0YzmNsGRXzKz+00Wz6e9kJbJhAko5TPqT7Ihp0fajXo+yMjjCWXh Ln4dcn/k1o6TQDtHMUBcB7PgYnVeC3LZOwBjt0+nA1ImtxuAPqNefPJ7ig== X-Google-Smtp-Source: AGHT+IFErHAjL8SN0MVSSUbo2xu2yuSye8VDkA/wXgIw9DoTE0ztbxvz5WvoFCTpkA55oUWttegjxw== X-Received: by 2002:a17:90a:3fc6:b0:2c7:da20:524b with SMTP id 98e67ed59e1d1-2c8504c7dbamr15211307a91.10.1719614859146; Fri, 28 Jun 2024 15:47:39 -0700 (PDT) Received: from dtor-ws.sjc.corp.google.com ([2620:15c:9d:2:9c98:1988:ce15:c0ac]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2c91ce58877sm2187163a91.24.2024.06.28.15.47.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 28 Jun 2024 15:47:38 -0700 (PDT) From: Dmitry Torokhov To: linux-input@vger.kernel.org Cc: linux-kernel@vger.kernel.org Subject: [PATCH 4/5] Input: cypress_ps2 - propagate errors from lower layers Date: Fri, 28 Jun 2024 15:47:26 -0700 Message-ID: <20240628224728.2180126-4-dmitry.torokhov@gmail.com> X-Mailer: git-send-email 2.45.2.803.g4e1b14247a-goog In-Reply-To: <20240628224728.2180126-1-dmitry.torokhov@gmail.com> References: <20240628224728.2180126-1-dmitry.torokhov@gmail.com> Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Do not override errors reported by lower layers with generic "-1", but propagate them to the callers. Change the checks for errors to be in the form of "if (error)" to maintain consistency. Signed-off-by: Dmitry Torokhov --- drivers/input/mouse/cypress_ps2.c | 62 +++++++++++++++++-------------- 1 file changed, 35 insertions(+), 27 deletions(-) diff --git a/drivers/input/mouse/cypress_ps2.c b/drivers/input/mouse/cypress_ps2.c index 8e17cd0bc437..87b87f14e749 100644 --- a/drivers/input/mouse/cypress_ps2.c +++ b/drivers/input/mouse/cypress_ps2.c @@ -97,10 +97,10 @@ static int cypress_ps2_read_cmd_status(struct psmouse *psmouse, unsigned char cmd, unsigned char *param) { - int rc; struct ps2dev *ps2dev = &psmouse->ps2dev; enum psmouse_state old_state; int pktsize; + int rc; ps2_begin_command(ps2dev); @@ -112,7 +112,7 @@ static int cypress_ps2_read_cmd_status(struct psmouse *psmouse, memset(param, 0, pktsize); rc = cypress_ps2_sendbyte(psmouse, 0xe9); - if (rc < 0) + if (rc) goto out; if (!wait_event_timeout(ps2dev->wait, @@ -322,15 +322,15 @@ static int cypress_read_tp_metrics(struct psmouse *psmouse) static int cypress_query_hardware(struct psmouse *psmouse) { - int ret; + int error; - ret = cypress_read_fw_version(psmouse); - if (ret) - return ret; + error = cypress_read_fw_version(psmouse); + if (error) + return error; - ret = cypress_read_tp_metrics(psmouse); - if (ret) - return ret; + error = cypress_read_tp_metrics(psmouse); + if (error) + return error; return 0; } @@ -339,9 +339,12 @@ static int cypress_set_absolute_mode(struct psmouse *psmouse) { struct cytp_data *cytp = psmouse->private; unsigned char param[3]; + int error; - if (cypress_send_ext_cmd(psmouse, CYTP_CMD_ABS_WITH_PRESSURE_MODE, param) < 0) - return -1; + error = cypress_send_ext_cmd(psmouse, CYTP_CMD_ABS_WITH_PRESSURE_MODE, + param); + if (error) + return error; cytp->mode = (cytp->mode & ~CYTP_BIT_ABS_REL_MASK) | CYTP_BIT_ABS_PRESSURE; @@ -366,7 +369,7 @@ static void cypress_reset(struct psmouse *psmouse) static int cypress_set_input_params(struct input_dev *input, struct cytp_data *cytp) { - int ret; + int error; if (!cytp->tp_res_x || !cytp->tp_res_y) return -EINVAL; @@ -383,10 +386,10 @@ static int cypress_set_input_params(struct input_dev *input, input_set_abs_params(input, ABS_MT_POSITION_Y, 0, cytp->tp_max_abs_y, 0, 0); input_set_abs_params(input, ABS_MT_PRESSURE, 0, 255, 0, 0); - ret = input_mt_init_slots(input, CYTP_MAX_MT_SLOTS, - INPUT_MT_DROP_UNUSED|INPUT_MT_TRACK); - if (ret < 0) - return ret; + error = input_mt_init_slots(input, CYTP_MAX_MT_SLOTS, + INPUT_MT_DROP_UNUSED | INPUT_MT_TRACK); + if (error) + return error; __set_bit(INPUT_PROP_SEMI_MT, input->propbit); @@ -637,21 +640,22 @@ static void cypress_disconnect(struct psmouse *psmouse) static int cypress_reconnect(struct psmouse *psmouse) { int tries = CYTP_PS2_CMD_TRIES; - int rc; + int error; do { cypress_reset(psmouse); - rc = cypress_detect(psmouse, false); - } while (rc && (--tries > 0)); + error = cypress_detect(psmouse, false); + } while (error && (--tries > 0)); - if (rc) { + if (error) { psmouse_err(psmouse, "Reconnect: unable to detect trackpad.\n"); - return -1; + return error; } - if (cypress_set_absolute_mode(psmouse)) { + error = cypress_set_absolute_mode(psmouse); + if (error) { psmouse_err(psmouse, "Reconnect: Unable to initialize Cypress absolute mode.\n"); - return -1; + return error; } return 0; @@ -660,6 +664,7 @@ static int cypress_reconnect(struct psmouse *psmouse) int cypress_init(struct psmouse *psmouse) { struct cytp_data *cytp; + int error; cytp = kzalloc(sizeof(*cytp), GFP_KERNEL); if (!cytp) @@ -670,17 +675,20 @@ int cypress_init(struct psmouse *psmouse) cypress_reset(psmouse); - if (cypress_query_hardware(psmouse)) { + error = cypress_query_hardware(psmouse); + if (error) { psmouse_err(psmouse, "Unable to query Trackpad hardware.\n"); goto err_exit; } - if (cypress_set_absolute_mode(psmouse)) { + error = cypress_set_absolute_mode(psmouse); + if (error) { psmouse_err(psmouse, "init: Unable to initialize Cypress absolute mode.\n"); goto err_exit; } - if (cypress_set_input_params(psmouse->dev, cytp) < 0) { + error = cypress_set_input_params(psmouse->dev, cytp); + if (error) { psmouse_err(psmouse, "init: Unable to set input params.\n"); goto err_exit; } @@ -705,5 +713,5 @@ int cypress_init(struct psmouse *psmouse) psmouse->private = NULL; kfree(cytp); - return -1; + return error; }