From patchwork Mon Aug 19 10:23:40 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claudiu X-Patchwork-Id: 820445 Received: from mail-wr1-f43.google.com (mail-wr1-f43.google.com [209.85.221.43]) (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 EA6B8165EF4 for ; Mon, 19 Aug 2024 10:24:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.43 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724063050; cv=none; b=BfQ84V2tMsntVz/3CuAPfQE5w92sqVaZzdPrysKIvN7YNnqe45c3uMhKa5btUCuPKqHC5ZU/mKI3zzlMHkps9ATg9x0C/gtj5q+tyHcFmhT9vi3s13mrZOfI/xoSY9x++p1giVYvll4ePZZ3qXTi3TgOeEyJLQrRgZ61K41d2kQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724063050; c=relaxed/simple; bh=z6TCcjwue9TYz7JInDjcmzx1UOfgxbAEKNVt5syHDaM=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=HAA1nl08vNO29k4mCPxiDXXNwm0PSjc6e6F/PVCJPB0r9WHI1wlxQ3XUbW1hCtmzDEftkHOAGDFfFvG3LqnJf3qIOtPZUVSbhPJafNX4F49/1Sr+RcLmtPwhFcohG0na6gsjK4Vg2U6L/uAU9stOMqb7l6wJLwX2i2gr6vdzYnk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=tuxon.dev; spf=pass smtp.mailfrom=tuxon.dev; dkim=pass (2048-bit key) header.d=tuxon.dev header.i=@tuxon.dev header.b=mncnCM8g; arc=none smtp.client-ip=209.85.221.43 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=tuxon.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=tuxon.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=tuxon.dev header.i=@tuxon.dev header.b="mncnCM8g" Received: by mail-wr1-f43.google.com with SMTP id ffacd0b85a97d-37196681d3bso1910766f8f.3 for ; Mon, 19 Aug 2024 03:24:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tuxon.dev; s=google; t=1724063047; x=1724667847; 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=NJ7yNcG1m1i0h8P6wLWOssV8KAFemhynAlwW6SKhVVo=; b=mncnCM8gy2FrBzlE9bPELAxyLgIqiL3nHP0agbx+H2oxoGYsDxDljBEDP4A2AltJ3S ftHtY76/pROZ8TlalUeMCgKa8m352sqVS/nrZ7aWweZZhFBnPkEGUC+FnacWyVrQYRCz Ps0kHiuuQ34FjTlFvEZ0cIM//hbERkqK7pVCT63294RY/RGRj2G6PV7nlqJQjhsFPhXC 7TYjAKiHTt9keJovtLx6HK2xi5YDJvNj2Ul+ZJKZyzFXoFEiJ0UkIaxzBNowfdZSrOBZ 3WVKwFWfCCcA1XW7eLfBrKy2zEew5ApZDa54FwQSivqJd2eyqL/rRH3qum9M1wrkpeit 0ixg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1724063047; x=1724667847; 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=NJ7yNcG1m1i0h8P6wLWOssV8KAFemhynAlwW6SKhVVo=; b=gatQkH/5irOXDQmUJu4rxMOvE5DS5jCLacIzihDuwwEKheIJRghT0X9EPHA7aiEpsD ftNko03XQUBBp/CYbkqvX1A4FSwHJ+wkSYfGFSS0VneaP/6nfAiL0vVbpxK7DcZAviFT aM8EacfyvJH2ZQtmAcj+8FB6s0ClJPBHbhAaFVsex52s1cj0C4I7X0L3D2AAcZkzJl96 lFg8Afkg3SCo2+JleLtRjwtCs+EZI+TTSkXqPiNtaAaFH8aqAde3s4E/r18XlcERs/bj eG9zLyw+/WLr5PrH5AJU5hJv6nyEDU7NihmqK6FCp5GFKfaynI5tWhMJ5/tIdZcghaXM uD1Q== X-Forwarded-Encrypted: i=1; AJvYcCU68WfRB0wRyxxOEjWZik0RzPwYI0pjBaMqJdoPpWyY7FUprq+kuG5B6cWOVyXnnaas5VcWSWnZM2x0/Ma7WfGxE9eFxysQ6N9F X-Gm-Message-State: AOJu0YxMqbbZ+34KxBKZoIGtBChgD4XzZ02Zl3OJX/OpaOypfTiWae5v ijey6VebJMq6g/tHxhTdSABPcMFFfP710Iluu4ukYvZUP488qcFuTkZ2vBGUuqE= X-Google-Smtp-Source: AGHT+IH35aeD9aoWxV9BWKKVbIqVat0Tr6oYJvQSkKpqYRsKX2JAzCz6Kq8sQaX2iqJjtiMtEYiPdA== X-Received: by 2002:a5d:69cc:0:b0:367:905c:823e with SMTP id ffacd0b85a97d-3719464e8d4mr6538216f8f.24.1724063047209; Mon, 19 Aug 2024 03:24:07 -0700 (PDT) Received: from claudiu-X670E-Pro-RS.. ([82.78.167.177]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-429ed650402sm106690275e9.11.2024.08.19.03.24.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 19 Aug 2024 03:24:06 -0700 (PDT) From: Claudiu X-Google-Original-From: Claudiu To: chris.brandt@renesas.com, andi.shyti@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, geert+renesas@glider.be, magnus.damm@gmail.com, p.zabel@pengutronix.de, wsa+renesas@sang-engineering.com Cc: linux-renesas-soc@vger.kernel.org, linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, claudiu.beznea@tuxon.dev, Claudiu Beznea Subject: [PATCH v4 03/11] i2c: riic: Use pm_runtime_resume_and_get() Date: Mon, 19 Aug 2024 13:23:40 +0300 Message-Id: <20240819102348.1592171-4-claudiu.beznea.uj@bp.renesas.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240819102348.1592171-1-claudiu.beznea.uj@bp.renesas.com> References: <20240819102348.1592171-1-claudiu.beznea.uj@bp.renesas.com> Precedence: bulk X-Mailing-List: linux-i2c@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Claudiu Beznea pm_runtime_get_sync() may return with error. In case it returns with error dev->power.usage_count needs to be decremented. pm_runtime_resume_and_get() takes care of this. Thus use it. Reviewed-by: Wolfram Sang Signed-off-by: Claudiu Beznea --- Changes in v4: - collected tags Changes in v3: - dropped error message on pm_runtime_resume_and_get() failures - restored initial place of i2c_del_adapter() in riic_i2c_remove() Changes in v2: - delete i2c adapter all the time in remove drivers/i2c/busses/i2c-riic.c | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) diff --git a/drivers/i2c/busses/i2c-riic.c b/drivers/i2c/busses/i2c-riic.c index 2e119024c2d7..6fc41bde2ec2 100644 --- a/drivers/i2c/busses/i2c-riic.c +++ b/drivers/i2c/busses/i2c-riic.c @@ -133,10 +133,12 @@ static int riic_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num) struct riic_dev *riic = i2c_get_adapdata(adap); struct device *dev = adap->dev.parent; unsigned long time_left; - int i; + int i, ret; u8 start_bit; - pm_runtime_get_sync(dev); + ret = pm_runtime_resume_and_get(dev); + if (ret) + return ret; if (riic_readb(riic, RIIC_ICCR2) & ICCR2_BBSY) { riic->err = -EBUSY; @@ -301,6 +303,7 @@ static const struct i2c_algorithm riic_algo = { static int riic_init_hw(struct riic_dev *riic, struct i2c_timings *t) { + int ret; unsigned long rate; int total_ticks, cks, brl, brh; struct device *dev = riic->adapter.dev.parent; @@ -379,7 +382,9 @@ static int riic_init_hw(struct riic_dev *riic, struct i2c_timings *t) t->scl_fall_ns / (1000000000 / rate), t->scl_rise_ns / (1000000000 / rate), cks, brl, brh); - pm_runtime_get_sync(dev); + ret = pm_runtime_resume_and_get(dev); + if (ret) + return ret; /* Changing the order of accessing IICRST and ICE may break things! */ riic_writeb(riic, ICCR1_IICRST | ICCR1_SOWP, RIIC_ICCR1); @@ -498,10 +503,13 @@ static void riic_i2c_remove(struct platform_device *pdev) { struct riic_dev *riic = platform_get_drvdata(pdev); struct device *dev = &pdev->dev; + int ret; - pm_runtime_get_sync(dev); - riic_writeb(riic, 0, RIIC_ICIER); - pm_runtime_put(dev); + ret = pm_runtime_resume_and_get(dev); + if (!ret) { + riic_writeb(riic, 0, RIIC_ICIER); + pm_runtime_put(dev); + } i2c_del_adapter(&riic->adapter); pm_runtime_disable(dev); }