From patchwork Sat Sep 14 16:07:24 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe JAILLET X-Patchwork-Id: 13804423 X-Patchwork-Delegate: geert@linux-m68k.org Received: from smtp.smtpout.orange.fr (smtp-16.smtpout.orange.fr [80.12.242.16]) (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 875F71D0DC1 for ; Sat, 14 Sep 2024 16:07:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=80.12.242.16 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726330075; cv=none; b=Ql9kySZ1H79s3QhPPL5yI60u14xx9APiXWk58QTIqpVYKymdASvGh1yl4Q5KW6gAdIjtSdh72ipNd2axpbGJR0e9T2HvY3KE/HONwlpPsqkXjLwxJlJw9h0otEZ3vhVZbn2fXJTc0AMzpsr0rjQGqGLbgsq281bbXN5M+aU3Lgc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726330075; c=relaxed/simple; bh=4sBx9Pok9ci2U6rCdVYCCf2eawSqaEDxsKn9nhdoqx8=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=HCY415sZVP0M3BUhjgRP0g8TiiUF7PgODBt9fAzfxVc7Vi9/Gd6bJzQgFW5TmV3m/Gz49NqRzq0FOgllf1iNZQXhDAA42X3k2GW+6oKhKq3DuFtSebjESpjJN78fSRRf67v5JPTEUVAW/VJXi0yHChlYIrZMT4dwwv+zh8vmeJc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=wanadoo.fr; spf=pass smtp.mailfrom=wanadoo.fr; dkim=pass (2048-bit key) header.d=wanadoo.fr header.i=@wanadoo.fr header.b=dFLl+TTw; arc=none smtp.client-ip=80.12.242.16 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=wanadoo.fr Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=wanadoo.fr Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=wanadoo.fr header.i=@wanadoo.fr header.b="dFLl+TTw" Received: from fedora.home ([90.11.132.44]) by smtp.orange.fr with ESMTPA id pVJIseX6XZkdcpVJIsxPA7; Sat, 14 Sep 2024 18:07:46 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=wanadoo.fr; s=t20230301; t=1726330066; bh=3K7AI48QI2FbNvgXLRmIkhjGNi47KFNECaCiYHSyQbw=; h=From:To:Subject:Date:Message-ID:MIME-Version; b=dFLl+TTwv3G1/KfT9nw1cqsJ+7ILIdiOX2VCQMiLqGRNUDl1yEJEfSeqv7R6W/9SB g+xbrqxkuVQzAs3hipVm8DwhRzdtN4Q9wvoHhWkZkFTrQG62/uNXrG/XDaMXOgWiYP dKwmHdpvr82dD2gDK5iKCnn66GGNJnYZ2kgnatiZ8p6yspye+TEffcDPth75+dfpfo k6Ruxq0iQjTzUaeFdSSK2RjgzrZGid+N3yGCKVE6GoDEXiBVoFOFLq+p4SMcVAuPak cHn3iLLJmWR5sl9GTOkXO54JkPM9Gj2VnL0Rv0IDL1lMwezXTTMf3P2Z8TdAorbZam 6vfeMBY5QEhmg== X-ME-Helo: fedora.home X-ME-Auth: Y2hyaXN0b3BoZS5qYWlsbGV0QHdhbmFkb28uZnI= X-ME-Date: Sat, 14 Sep 2024 18:07:46 +0200 X-ME-IP: 90.11.132.44 From: Christophe JAILLET To: biju.das.jz@bp.renesas.com, Yoshihiro Shimoda , Vinod Koul , Kishon Vijay Abraham I , Philipp Zabel , Claudiu Beznea Cc: linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org, Christophe JAILLET , linux-renesas-soc@vger.kernel.org, linux-phy@lists.infradead.org Subject: [PATCH v3] phy: renesas: rcar-gen3-usb2: Fix an error handling path in rcar_gen3_phy_usb2_probe() Date: Sat, 14 Sep 2024 18:07:24 +0200 Message-ID: <290b25827e3f0742808940719455ff0c5cb9d01d.1726329925.git.christophe.jaillet@wanadoo.fr> X-Mailer: git-send-email 2.46.0 Precedence: bulk X-Mailing-List: linux-renesas-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 If an error occurs after the reset_control_deassert(), reset_control_assert() must be called, as already done in the remove function. Use devm_add_action_or_reset() to add the missing call and simplify the .remove() function accordingly. Fixes: 4eae16375357 ("phy: renesas: rcar-gen3-usb2: Add support to initialize the bus") Signed-off-by: Christophe JAILLET --- This patch changes the order of function calls when releasing the resources in the .remove function(). Looks fine to me, but pm_ functions are sometimes tricky. Changes in v3: - Use devm_add_action_or_reset() [Biju Das] Changes in v2: (broken proposal) - Re-use 'error' to simplify the patch [claudiu beznea] - Update the commit description to explain why it is safe. v2: https://lore.kernel.org/all/4efe2d0419cbe98163e2422ebe0c7896b8a5efed.1725717505.git.christophe.jaillet@wanadoo.fr/ v1: https://lore.kernel.org/all/fc9f7b444f0ca645411868992bbe16514aeccfed.1725652654.git.christophe.jaillet@wanadoo.fr/ --- drivers/phy/renesas/phy-rcar-gen3-usb2.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/drivers/phy/renesas/phy-rcar-gen3-usb2.c b/drivers/phy/renesas/phy-rcar-gen3-usb2.c index 58e123305152..c8a3727f56aa 100644 --- a/drivers/phy/renesas/phy-rcar-gen3-usb2.c +++ b/drivers/phy/renesas/phy-rcar-gen3-usb2.c @@ -668,6 +668,13 @@ static enum usb_dr_mode rcar_gen3_get_dr_mode(struct device_node *np) return candidate; } +static void rcar_gen3_reset_assert(void *data) +{ + struct reset_control *rstc = data; + + reset_control_assert(rstc); +} + static int rcar_gen3_phy_usb2_init_bus(struct rcar_gen3_chan *channel) { struct device *dev = channel->dev; @@ -686,6 +693,11 @@ static int rcar_gen3_phy_usb2_init_bus(struct rcar_gen3_chan *channel) if (ret) goto rpm_put; + ret = devm_add_action_or_reset(dev, rcar_gen3_reset_assert, + channel->rstc); + if (ret) + return ret; + val = readl(channel->base + USB2_AHB_BUS_CTR); val &= ~USB2_AHB_BUS_CTR_MBL_MASK; val |= USB2_AHB_BUS_CTR_MBL_INCR4; @@ -815,7 +827,6 @@ static void rcar_gen3_phy_usb2_remove(struct platform_device *pdev) if (channel->is_otg_channel) device_remove_file(&pdev->dev, &dev_attr_role); - reset_control_assert(channel->rstc); pm_runtime_disable(&pdev->dev); };