From nobody Thu Oct 2 04:44:12 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EB38B192B75 for ; Mon, 22 Sep 2025 15:22:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758554564; cv=none; b=IQQI3Gt7ZBINCRRMG64tmvFT36X9YRiUaxv0gGy/+5bakjE3SigTYR3oq8ytmbY9uSFTXVs0C10y2Z5XzgCmXP/kTGQctj+ONd5mxGkP1c0VAXjbOdd8uCmndyxrNDg67OxqFeZ0rKe3XFmgRDNpWeQld2qY4oYKAW07DL76ynw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758554564; c=relaxed/simple; bh=f7AAOBOjgXPIcU9dvL/Owulz/NXNusEyUQL8u28tE64=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=t3Pb1h747Niq5lHVu1ETunOdJizzjGBAXsXSV1h7Vk3vheEHRGph+MYHu5go0VG3sC6ACyCKjJzolDEfLcsoPvGrqM9y8rlDb31RAmCrfr1QWEdi8xuurqoOFvcu/seyloReMAhDPUXzkHnlpBL1xEYoawOBX7SSzCRG7bNJRqM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=bthpSdYL; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="bthpSdYL" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 70137C4CEF0; Mon, 22 Sep 2025 15:22:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1758554563; bh=f7AAOBOjgXPIcU9dvL/Owulz/NXNusEyUQL8u28tE64=; h=From:To:Cc:Subject:Date:From; b=bthpSdYL7IlA1gb80jBDIIEbLlx5ypcMwQy8n270nRKyvVp2qqoVwm7XVV4qo+icH 5mVKkxyfIopxABReot/BduZH69ZZ+QwmprRz8TxWf4Ula1sDeqBqOAQ3DHJ9SdQXER 6Z+3wXKI1vDydd3whAyxjhGnvfwBB1mceBXk3khO48AM/pAJbX/uPMYbhwjNvIk9wQ dwt0w2Zb94GgmyvYzfKKX0TjcfUdHGJiQfM6zvWFQUp3NV3f3iXiMmrFoMgoN6Q5zZ 5PcHK2M0lpYFe6TI+ROeDAMKUyNM0rvsmf39zyXqGbi3CB6gIsHf/yJRfnZJjeu9Hn EZV//O/2oGclg== Received: from johan by xi.lan with local (Exim 4.98.2) (envelope-from ) id 1v0iNA-00000000469-1DsI; Mon, 22 Sep 2025 17:22:37 +0200 From: Johan Hovold To: Miquel Raynal Cc: Richard Weinberger , Vignesh Raghavendra , linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org, Johan Hovold Subject: [PATCH] mtd: rawnand: omap2: fix device leak on probe failure Date: Mon, 22 Sep 2025 17:22:04 +0200 Message-ID: <20250922152204.15702-1-johan@kernel.org> X-Mailer: git-send-email 2.49.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Make sure to drop the reference to the elm device taken by of_find_device_by_node() during probe on errors and on driver unload. Fixes: 62116e5171e0 ("mtd: nand: omap2: Support for hardware BCH error corr= ection.") Signed-off-by: Johan Hovold --- drivers/mtd/nand/raw/omap2.c | 26 +++++++++++++++++++++----- 1 file changed, 21 insertions(+), 5 deletions(-) diff --git a/drivers/mtd/nand/raw/omap2.c b/drivers/mtd/nand/raw/omap2.c index b8af3a3533fc..61fd98ad5c78 100644 --- a/drivers/mtd/nand/raw/omap2.c +++ b/drivers/mtd/nand/raw/omap2.c @@ -1979,7 +1979,7 @@ static int omap_nand_attach_chip(struct nand_chip *ch= ip) err =3D rawnand_sw_bch_init(chip); if (err) { dev_err(dev, "Unable to use BCH library\n"); - return err; + goto err_put_elm_dev; } break; =20 @@ -2016,7 +2016,7 @@ static int omap_nand_attach_chip(struct nand_chip *ch= ip) err =3D rawnand_sw_bch_init(chip); if (err) { dev_err(dev, "unable to use BCH library\n"); - return err; + goto err_put_elm_dev; } break; =20 @@ -2054,7 +2054,8 @@ static int omap_nand_attach_chip(struct nand_chip *ch= ip) break; default: dev_err(dev, "Invalid or unsupported ECC scheme\n"); - return -EINVAL; + err =3D -EINVAL; + goto err_put_elm_dev; } =20 if (elm_bch_strength >=3D 0) { @@ -2073,7 +2074,7 @@ static int omap_nand_attach_chip(struct nand_chip *ch= ip) info->nsteps_per_eccpg, chip->ecc.size, chip->ecc.bytes); if (err < 0) - return err; + goto err_put_elm_dev; } =20 /* Check if NAND device's OOB is enough to store ECC signatures */ @@ -2083,10 +2084,24 @@ static int omap_nand_attach_chip(struct nand_chip *= chip) dev_err(dev, "Not enough OOB bytes: required =3D %d, available=3D%d\n", min_oobbytes, mtd->oobsize); - return -EINVAL; + err =3D -EINVAL; + goto err_put_elm_dev; } =20 return 0; + +err_put_elm_dev: + put_device(info->elm_dev); + + return err; +} + +static void omap_nand_detach_chip(struct nand_chip *chip) +{ + struct mtd_info *mtd =3D nand_to_mtd(chip); + struct omap_nand_info *info =3D mtd_to_omap(mtd); + + put_device(info->elm_dev); } =20 static void omap_nand_data_in(struct nand_chip *chip, void *buf, @@ -2187,6 +2202,7 @@ static int omap_nand_exec_op(struct nand_chip *chip, =20 static const struct nand_controller_ops omap_nand_controller_ops =3D { .attach_chip =3D omap_nand_attach_chip, + .detach_chip =3D omap_nand_detach_chip, .exec_op =3D omap_nand_exec_op, }; =20 --=20 2.49.1