From mboxrd@z Thu Jan 1 00:00:00 1970 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 BC38D217F40; Thu, 12 Dec 2024 17:07:02 +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=1734023222; cv=none; b=DuvjDkGYyJbxgWAbSTn132oHKd46j1jqhKf3npxA+JU+cVW50SEdqYvvzLJdlWhhlOr896ijqFEsuMgqPagG6Yv3QBWSCSsBALorhlGnVoj0UkjGdfoakjPRciOY5pr6UVBi2mkxFiAGtz1SZcWa3/xZvucUfywMABNmnjZJENw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734023222; c=relaxed/simple; bh=wmmt3VGqGaTNbt1PNZ5eky598xYl4IXIacpvfpsjWN0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=C/b55MfleAlMnh6gvcxUSr5Umum4MYnp5iOW7Vk/JbvBUghhULxb+jXYUj41vgJpXAgu3DAmVDd2oHzZOjMtQTOqlpXxvsrnchffM+KtDJqFaKpIpFwDXtsvA9KFBTptO3HwG4mdjlCPpbC39HsSK2VAmWpYrESf0k3fvZfhiQk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=j/2so/su; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="j/2so/su" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3D98BC4CECE; Thu, 12 Dec 2024 17:07:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1734023222; bh=wmmt3VGqGaTNbt1PNZ5eky598xYl4IXIacpvfpsjWN0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=j/2so/surLocqqk2eyfNVfDKfT4WsRDMSpBiWYwdOBM96WO9+WeKlFw12wzeb51br llNfPO3ts42XZSrjKty2dKX4Dh/Pnx/2jZFWxQlwF+zVr6FSMjFi2xDuUTh2eNlRhr k6NiZi6S2WeDz7C5Gq2Viw38zac1NlGPF1gu5ZCY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Cosmin Tanislav , Mark Brown Subject: [PATCH 5.15 464/565] regmap: detach regmap from dev on regmap_exit Date: Thu, 12 Dec 2024 16:00:59 +0100 Message-ID: <20241212144330.075814519@linuxfoundation.org> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241212144311.432886635@linuxfoundation.org> References: <20241212144311.432886635@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Cosmin Tanislav commit 3061e170381af96d1e66799d34264e6414d428a7 upstream. At the end of __regmap_init(), if dev is not NULL, regmap_attach_dev() is called, which adds a devres reference to the regmap, to be able to retrieve a dev's regmap by name using dev_get_regmap(). When calling regmap_exit, the opposite does not happen, and the reference is kept until the dev is detached. Add a regmap_detach_dev() function and call it in regmap_exit() to make sure that the devres reference is not kept. Cc: stable@vger.kernel.org Fixes: 72b39f6f2b5a ("regmap: Implement dev_get_regmap()") Signed-off-by: Cosmin Tanislav Rule: add Link: https://lore.kernel.org/stable/20241128130554.362486-1-demonsingur%40gmail.com Link: https://patch.msgid.link/20241128131625.363835-1-demonsingur@gmail.com Signed-off-by: Mark Brown Signed-off-by: Greg Kroah-Hartman --- drivers/base/regmap/regmap.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -663,6 +663,17 @@ int regmap_attach_dev(struct device *dev } EXPORT_SYMBOL_GPL(regmap_attach_dev); +static int dev_get_regmap_match(struct device *dev, void *res, void *data); + +static int regmap_detach_dev(struct device *dev, struct regmap *map) +{ + if (!dev) + return 0; + + return devres_release(dev, dev_get_regmap_release, + dev_get_regmap_match, (void *)map->name); +} + static enum regmap_endian regmap_get_reg_endian(const struct regmap_bus *bus, const struct regmap_config *config) { @@ -1497,6 +1508,7 @@ int regmap_reinit_cache(struct regmap *m { int ret; + regmap_detach_dev(map->dev, map); regcache_exit(map); regmap_debugfs_exit(map);