From patchwork Mon Aug 5 08:55:10 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Francesco Dolcini X-Patchwork-Id: 13753285 Received: from mail11.truemail.it (mail11.truemail.it [217.194.8.81]) (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 8623273459; Mon, 5 Aug 2024 09:04:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.194.8.81 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722848673; cv=none; b=ciA4rTyKPuG3VoUaPZfdd4lR4coEzhg6W7X0E/e1dHIJMvf80MSbc4lj4wKb/EPs189te8YO5oNSfYivp7F41OGYZt7r7HTrg/exraLovrOPEGTYNYTIbXCK3cQXczlBQu97uY9XHbKZIJ/yjbrwI6x5QBLIB6I5bhJMkMYBAQg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722848673; c=relaxed/simple; bh=Xdg9MTm5ISh9HHbRmA0mpCPLms1iymH+FNp/AmvGXBA=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=S+slu7pdzK88CCPbH1MlwfLZQsZA+D/6RQZg72l5Kcs6iwhmvn70vOOGwSM6lZirMU/HOLUWB1Q/qieX/vp9dVoB+Fq3l8g9StfchGgrI67sEFFRXGabGbKIn5XSLHUA+KzWUjf7DjZXVyQd8YratUk2U5RrPVhJw/lr7Jj+Elk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=dolcini.it; spf=pass smtp.mailfrom=dolcini.it; dkim=pass (2048-bit key) header.d=dolcini.it header.i=@dolcini.it header.b=zzrc9kfW; arc=none smtp.client-ip=217.194.8.81 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=dolcini.it Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=dolcini.it Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=dolcini.it header.i=@dolcini.it header.b="zzrc9kfW" Received: from francesco-nb.pivistrello.it (93-49-2-63.ip317.fastwebnet.it [93.49.2.63]) by mail11.truemail.it (Postfix) with ESMTPA id BB88F211B4; Mon, 5 Aug 2024 10:55:35 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=dolcini.it; s=default; t=1722848136; bh=Vz4kl9A1fCdrJVDPCUDHiuZIc2J1bH3TwP7xBqLCRKk=; h=From:To:Subject; b=zzrc9kfWvFbDd+vwhsrjbwOxFMZyd6m/Dk+ekpkGIG0sgXgVMFvNO+g6LeMkLylNH zWv6PLB2578aSQ+Ga9dCBXvEuQoeoozgG2vAIJEB6xHKLbcu7PMrKj22h0C022ESHb f1ZyBiTLx2UE+JAh6+ZVVOdOg0EWeEtDMYt8deSvoapPkw+Kz3ERMlU9wKHtjs1yjb eR+bG3QDb+5SLZHVOXXN1x5PqKP8nrS2C8Qx36/51zBFnHQCqEHledepT5fdgbdFvV 7OplJgNHlKPK/ZDxWKbwlxxLMfxorcYGYkohOZjK7ghyjTcJ20/MQ2Fm/W1sL2TYh7 KX1AvlES4ZZzQ== From: Francesco Dolcini To: Dmitry Torokhov Cc: Emanuele Ghidoli , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, Francesco Dolcini Subject: [PATCH v4 1/2] Input: ilitek_ts_i2c - avoid wrong input subsystem sync Date: Mon, 5 Aug 2024 10:55:10 +0200 Message-Id: <20240805085511.43955-2-francesco@dolcini.it> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240805085511.43955-1-francesco@dolcini.it> References: <20240805085511.43955-1-francesco@dolcini.it> Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Emanuele Ghidoli For different reasons i2c transaction may fail or report id message content may be wrong. Avoid sync the input subsystem if message cannot be parsed. An input subsystem sync without points is interpreted as "nothing is touching the screen" while normally this is not the case. Fixes: 42370681bd46 ("Input: Add support for ILITEK Lego Series") Signed-off-by: Emanuele Ghidoli Signed-off-by: Francesco Dolcini --- v4: - remove err_sync_frame label, just return in case of error - removed reviewed by v3: https://lore.kernel.org/all/20231222183114.30775-1-francesco@dolcini.it/ - series taken over from Emanuele to Francesco and resent v2: https://lore.kernel.org/all/20230920074650.922292-1-ghidoliemanuele@gmail.com/ - first version v1: not existing, patch was initially sent as v2 by mistake --- drivers/input/touchscreen/ilitek_ts_i2c.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) diff --git a/drivers/input/touchscreen/ilitek_ts_i2c.c b/drivers/input/touchscreen/ilitek_ts_i2c.c index 3eb762896345..e1849185e18c 100644 --- a/drivers/input/touchscreen/ilitek_ts_i2c.c +++ b/drivers/input/touchscreen/ilitek_ts_i2c.c @@ -160,15 +160,14 @@ static int ilitek_process_and_report_v6(struct ilitek_ts_data *ts) error = ilitek_i2c_write_and_read(ts, NULL, 0, 0, buf, 64); if (error) { dev_err(dev, "get touch info failed, err:%d\n", error); - goto err_sync_frame; + return error; } report_max_point = buf[REPORT_COUNT_ADDRESS]; if (report_max_point > ts->max_tp) { dev_err(dev, "FW report max point:%d > panel info. max:%d\n", report_max_point, ts->max_tp); - error = -EINVAL; - goto err_sync_frame; + return -EINVAL; } count = DIV_ROUND_UP(report_max_point, packet_max_point); @@ -178,7 +177,7 @@ static int ilitek_process_and_report_v6(struct ilitek_ts_data *ts) if (error) { dev_err(dev, "get touch info. failed, cnt:%d, err:%d\n", count, error); - goto err_sync_frame; + return error; } } @@ -203,10 +202,10 @@ static int ilitek_process_and_report_v6(struct ilitek_ts_data *ts) ilitek_touch_down(ts, id, x, y); } -err_sync_frame: input_mt_sync_frame(input); input_sync(input); - return error; + + return 0; } /* APIs of cmds for ILITEK Touch IC */