From patchwork Fri Apr 22 13:21:36 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam X-Patchwork-Id: 565177 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D666EC433FE for ; Fri, 22 Apr 2022 13:22:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1447910AbiDVNZB (ORCPT ); Fri, 22 Apr 2022 09:25:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56372 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1447777AbiDVNY4 (ORCPT ); Fri, 22 Apr 2022 09:24:56 -0400 Received: from mail-pl1-x631.google.com (mail-pl1-x631.google.com [IPv6:2607:f8b0:4864:20::631]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B257D5675F for ; Fri, 22 Apr 2022 06:22:02 -0700 (PDT) Received: by mail-pl1-x631.google.com with SMTP id n8so10849175plh.1 for ; Fri, 22 Apr 2022 06:22:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=4re5OWonUoWdRvSDXbNxViVwfbYtstxFeWpMXUatUMo=; b=qRTRtoPbGwWu7NbWdxinV9rTgVqPvkLpJjqKnPRc1dkhO6LBdwC8c96r5phZCRCVxq 5aeCyO7cZGFvWYg8rHuGdQS1eH6CLLQqJIv8guW7BxlqSgPLdnisheD+0zELrvzLl86d UBtd8CgC0ZwhIrrKjz5mHBT43/MtHoyo71MUVmPGMaoksVfwYCpqByYld0oMoP/uDRo6 39VcweT0yQx25pyNMKbeb6qprLfMdjfKHHBjdCiD6eje9hJoJC+84CEGQrcALgyeWw2Q 2fVPQz5HTR4BtSHR1f6dVX8rjbnvVGGgkV7atsy+lWLc0iouZcYwqQM7yevVHRfLuyn1 FHQQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=4re5OWonUoWdRvSDXbNxViVwfbYtstxFeWpMXUatUMo=; b=YFjpXWPeGFHafQSqtMDvXCsgdWSSvPh2DkkmUj3kx3SgKSikXn/q2Wox0pHKeuEUil pdA1gYeaBQGukM/DbiCBiNfODWjMeznIXCy7+bk2Xb6Vvk6ARrSk3N33UTTLFRPwHQFe R+uI4NeoLF3PTAXxUGX7Z9XWSBtdxvcmkWw8ipGDrNfyNUtd6z2YF3nqbt6tNK8DBgdY k2Wuaz/MVBk2x8B2O/mYlgzAB8DE3FnTPzKV9VWkHdXdiRnrd49g33hF018gaNMsnV3n dPTo7oyRHf8ILnVbtVlb1ZTZY1dQPO1yvK6aGz1HrVpkNzx93mD4U5/26MgSVXRz4hUs N9zg== X-Gm-Message-State: AOAM532IPq6zXBY292JSI36Wnpm4BIDo6MjK6hi2tZyK3GtR61Nd1y/v gW+hkIAT6yksCiQh65ZINVsP X-Google-Smtp-Source: ABdhPJwIpV2owBIVHmXS11m41XD/92aDrOQLfeuc66hnB4mj8MFIhw5X9cODI7BW/0wPMEkxnIRRUg== X-Received: by 2002:a17:90a:8418:b0:1d2:7c69:e3bf with SMTP id j24-20020a17090a841800b001d27c69e3bfmr16165389pjn.44.1650633722228; Fri, 22 Apr 2022 06:22:02 -0700 (PDT) Received: from localhost.localdomain ([117.207.28.196]) by smtp.gmail.com with ESMTPSA id g13-20020a62520d000000b0050a923a7754sm2586840pfb.119.2022.04.22.06.21.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 22 Apr 2022 06:22:01 -0700 (PDT) From: Manivannan Sadhasivam To: martin.petersen@oracle.com, jejb@linux.ibm.com Cc: avri.altman@wdc.com, alim.akhtar@samsung.com, bjorn.andersson@linaro.org, linux-arm-msm@vger.kernel.org, quic_asutoshd@quicinc.com, quic_cang@quicinc.com, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, Manivannan Sadhasivam Subject: [PATCH 1/5] scsi: ufs: qcom: Fix acquiring the optional reset control line Date: Fri, 22 Apr 2022 18:51:36 +0530 Message-Id: <20220422132140.313390-2-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220422132140.313390-1-manivannan.sadhasivam@linaro.org> References: <20220422132140.313390-1-manivannan.sadhasivam@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org On Qcom UFS platforms, the reset control line seems to be optional (for SoCs like MSM8996 and probably for others too). The current logic tries to mimic the `devm_reset_control_get_optional()` API but it also continues the probe if there is an error with the declared reset line in DT/ACPI. In an ideal case, if the reset line is not declared in DT/ACPI, the probe should continue. But if there is problem in acquiring the declared reset line (like EPROBE_DEFER) it should fail and return the appropriate error code. Signed-off-by: Manivannan Sadhasivam --- drivers/scsi/ufs/ufs-qcom.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c index 0d2e950d0865..5db0fd922062 100644 --- a/drivers/scsi/ufs/ufs-qcom.c +++ b/drivers/scsi/ufs/ufs-qcom.c @@ -1002,13 +1002,13 @@ static int ufs_qcom_init(struct ufs_hba *hba) host->hba = hba; ufshcd_set_variant(hba, host); - /* Setup the reset control of HCI */ - host->core_reset = devm_reset_control_get(hba->dev, "rst"); + /* Setup the optional reset control of HCI */ + host->core_reset = devm_reset_control_get_optional(hba->dev, "rst"); if (IS_ERR(host->core_reset)) { err = PTR_ERR(host->core_reset); - dev_warn(dev, "Failed to get reset control %d\n", err); - host->core_reset = NULL; - err = 0; + if (err != -EPROBE_DEFER) + dev_err(dev, "Failed to get reset control %d\n", err); + goto out_variant_clear; } /* Fire up the reset controller. Failure here is non-fatal. */