From patchwork Wed Apr 24 12:29:32 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartosz Golaszewski X-Patchwork-Id: 791653 Received: from mail-wm1-f53.google.com (mail-wm1-f53.google.com [209.85.128.53]) (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 29CFA15B120 for ; Wed, 24 Apr 2024 12:29:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.53 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713961793; cv=none; b=YGUPzBRTAcp9jRtzUXvUQ+NCmmksEMeiyd7uZ1hKF1gRcb+pyiPyEGuYvyo9oMNLk8FlMvEL2JHsDX/wz6AHA7iNJ5NK7G/8rJguZqtH/thEa+gh4NQ6PVrnhQEhw8avZ2JSKmxfG4Cg/+F8tBA3YeGyidkF9oZF/NaSjumzlxA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713961793; c=relaxed/simple; bh=I8JHcqSr1Mqm7BxNvH2G+ew64E3zN8ICLGLmqbFjLoI=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=MRrxKYsXGEWlU+1Nc7n7Hc6gw5BQpNMxYiz1h8md8G2Pbx3U/1drAmOeGNGdpA/+0S+7ZCNys3bh6hwz4JExJLaqiSpAgJEmHpFui35p6t1P62LcX3T2eKS7uyqfVHOIoovIWlDMFahtCfHgpjTD3gpyV5hf3YWT4y1CpHIkxhk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=bgdev.pl; spf=none smtp.mailfrom=bgdev.pl; dkim=pass (2048-bit key) header.d=bgdev-pl.20230601.gappssmtp.com header.i=@bgdev-pl.20230601.gappssmtp.com header.b=C4vQJg1T; arc=none smtp.client-ip=209.85.128.53 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=bgdev.pl Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=bgdev.pl Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bgdev-pl.20230601.gappssmtp.com header.i=@bgdev-pl.20230601.gappssmtp.com header.b="C4vQJg1T" Received: by mail-wm1-f53.google.com with SMTP id 5b1f17b1804b1-41a0979b9aeso29762775e9.3 for ; Wed, 24 Apr 2024 05:29:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bgdev-pl.20230601.gappssmtp.com; s=20230601; t=1713961790; x=1714566590; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=vWtmZ5PdQ7AkuvXH/covTAsvSmEpguf1BcHW30rYhQ0=; b=C4vQJg1TpP8a14iLjHwwhR+MjDugh8eae4psu05cVhOkiCr8QxolaiDPb2ACb+qrv0 PCrsfaspVAoS3bs6NerwKXBiEl66JMDmje4fCj0+m6S1aC6IoXbjlSp2YuSmBFH2BZp6 ojiYE4s7otKcnnAeEtyo5FyZMBUj+ZtV55oq2oA4YJVuJzSDp8eSr5FXHVkb/S+PXrVE EZYB2iT7iOjqMGYSO1597ayqOOHVvLHxFF/a+PG7NKrzKNK2EigLYz6Y02qCaf77If2Y b42j5GX3sd1xsLtAmV5GpU9lgOTevRXnAS3P8faXdVXuCPOqgkMQwN/jN2DWk80Nh+jf QxAA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1713961790; x=1714566590; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=vWtmZ5PdQ7AkuvXH/covTAsvSmEpguf1BcHW30rYhQ0=; b=d66vpToD/tB76hK8M1gUU/f304Bf7fSxCgabKNITYhCpYsE+ULUGU8x2Q5a5rw+STy qR2Jij2TldXv9ODQLauHBKPXUIJaEwTvXI9x2PXg1Fr9qdOxgbjdZ9Cl0Ij7HeJNoPGm E4krO7RwU+Uyn6xm1yhaXPocw832zGFD4lnpC8YY9EYgqTjyPyXeyIuJofUNLRPOkyDl 4kM51fRiniSGfXaYyhZCvG2q4n6i9VEpz/ll30C8DoV9UT2IyU2baJ25FCIS7NBbm55P uGY1I4tjgtF4eZaKqw/7qbtPh+Z5H1Ec7qFtiWh1KRcy/D+PvwlSf9HB9y7es241fztI 92vw== X-Gm-Message-State: AOJu0YwRsQOyP7TyBnAnKNMk+X+w9tz7HnKe1ns+u5eXTsu22DAIERVi dBpYpgyWGu4wXyoaSDf5c7jpg0csRHmpDszIpCLBpYB/9vrr8BW7gow7czcEN9E= X-Google-Smtp-Source: AGHT+IGulFqaqD6gbOE1TUdpd2CJEXWTKn3weFW0kCzg+pu7D4O+Rt4yeRNvsqtF0Ix1d6WsHfoE3g== X-Received: by 2002:a05:600c:1c94:b0:416:3478:658c with SMTP id k20-20020a05600c1c9400b004163478658cmr1792376wms.27.1713961790457; Wed, 24 Apr 2024 05:29:50 -0700 (PDT) Received: from brgl-uxlite.home ([2a01:cb1d:75a:e000:da66:dc78:acc5:bb9c]) by smtp.gmail.com with ESMTPSA id q6-20020a05600c46c600b0041892857924sm23750712wmo.36.2024.04.24.05.29.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 24 Apr 2024 05:29:39 -0700 (PDT) From: Bartosz Golaszewski To: Marcel Holtmann , Luiz Augusto von Dentz , Krzysztof Kozlowski Cc: linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, Bartosz Golaszewski , Wren Turkal , Zijun Hu Subject: [PATCH v2] Bluetooth: qca: set power_ctrl_enabled on NULL returned by gpiod_get_optional() Date: Wed, 24 Apr 2024 14:29:32 +0200 Message-Id: <20240424122932.79120-1-brgl@bgdev.pl> X-Mailer: git-send-email 2.40.1 Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Bartosz Golaszewski Any return value from gpiod_get_optional() other than a pointer to a GPIO descriptor or a NULL-pointer is an error and the driver should abort probing. That being said: commit 56d074d26c58 ("Bluetooth: hci_qca: don't use IS_ERR_OR_NULL() with gpiod_get_optional()") no longer sets power_ctrl_enabled on NULL-pointer returned by devm_gpiod_get_optional(). Restore this behavior but bail-out on errors. While at it: also bail-out on error returned when trying to get the "swctrl" GPIO. Reported-by: Wren Turkal Reported-by: Zijun Hu Closes: https://lore.kernel.org/linux-bluetooth/1713449192-25926-2-git-send-email-quic_zijuhu@quicinc.com/ Fixes: 56d074d26c58 ("Bluetooth: hci_qca: don't use IS_ERR_OR_NULL() with gpiod_get_optional()") Reviewed-by: Krzysztof Kozlowski Signed-off-by: Bartosz Golaszewski Reported-by: Wren Turkal Reported-by: Zijun Hu --- v1 -> v2: - also restore the previous behavior for QCA6390 and other models that fall under the default: label in the affected switch case - bail-out on errors when getting the swctrl GPIO too drivers/bluetooth/hci_qca.c | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c index 92fa20f5ac7d..0e98ad2c0c9d 100644 --- a/drivers/bluetooth/hci_qca.c +++ b/drivers/bluetooth/hci_qca.c @@ -2327,16 +2327,21 @@ static int qca_serdev_probe(struct serdev_device *serdev) (data->soc_type == QCA_WCN6750 || data->soc_type == QCA_WCN6855)) { dev_err(&serdev->dev, "failed to acquire BT_EN gpio\n"); - power_ctrl_enabled = false; + return PTR_ERR(qcadev->bt_en); } + if (!qcadev->bt_en) + power_ctrl_enabled = false; + qcadev->sw_ctrl = devm_gpiod_get_optional(&serdev->dev, "swctrl", GPIOD_IN); if (IS_ERR(qcadev->sw_ctrl) && (data->soc_type == QCA_WCN6750 || data->soc_type == QCA_WCN6855 || - data->soc_type == QCA_WCN7850)) - dev_warn(&serdev->dev, "failed to acquire SW_CTRL gpio\n"); + data->soc_type == QCA_WCN7850)) { + dev_err(&serdev->dev, "failed to acquire SW_CTRL gpio\n"); + return PTR_ERR(qcadev->sw_ctrl); + } qcadev->susclk = devm_clk_get_optional(&serdev->dev, NULL); if (IS_ERR(qcadev->susclk)) { @@ -2355,10 +2360,13 @@ static int qca_serdev_probe(struct serdev_device *serdev) qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable", GPIOD_OUT_LOW); if (IS_ERR(qcadev->bt_en)) { - dev_warn(&serdev->dev, "failed to acquire enable gpio\n"); - power_ctrl_enabled = false; + dev_err(&serdev->dev, "failed to acquire enable gpio\n"); + return PTR_ERR(qcadev->bt_en); } + if (!qcadev->bt_en) + power_ctrl_enabled = false; + qcadev->susclk = devm_clk_get_optional(&serdev->dev, NULL); if (IS_ERR(qcadev->susclk)) { dev_warn(&serdev->dev, "failed to acquire clk\n");