From patchwork Wed Feb 22 16:24:08 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kai-Heng Feng X-Patchwork-Id: 13149339 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 A0144C636D6 for ; Wed, 22 Feb 2023 16:25:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230284AbjBVQZF (ORCPT ); Wed, 22 Feb 2023 11:25:05 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45152 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229980AbjBVQZF (ORCPT ); Wed, 22 Feb 2023 11:25:05 -0500 Received: from smtp-relay-canonical-0.canonical.com (smtp-relay-canonical-0.canonical.com [185.125.188.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1C5EF3647C; Wed, 22 Feb 2023 08:25:02 -0800 (PST) Received: from localhost.localdomain (unknown [10.101.196.174]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by smtp-relay-canonical-0.canonical.com (Postfix) with ESMTPSA id 4425A3FA87; Wed, 22 Feb 2023 16:24:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=canonical.com; s=20210705; t=1677083101; bh=6PZoDVXhrOY89Anuzhd0k/e1jCsb5iCwDs2AL131Olw=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=Kpqz86SwHgCXxRYK2e7aTn45rpRE8l/VL/7Rgpsc3xqXvBcgruRCQ/O02OLyUtsn2 dAd9sIDbubB2oS4Ff5/f38lU5xq6hKvSglGwS5HGf6AN2cNQxt1Y+Is6gLZ15hLFRO pJ0Njha8NZ1KcOpS3/Ka1Ysdo7P4cZeh9kmG6uSODtHK2W+9iqW+6SA5YjvSbqs316 y4sacGb2tWq42kJZ3SEeyIHMpCWPcyPq3M7JxcAmEOSyz465nMuHyY6VmxscBO5+/b vE3LYRZbFrC48LgXq1xZiCA6B4D3MPGmoLDGYtuW68ntN/Y8lrAIYp3PTMyyjxi9T+ 9QMBcvZC2BRSA== From: Kai-Heng Feng To: jic23@kernel.org, lars@metafoo.de Cc: hdegoede@redhat.com, Kai-Heng Feng , Kevin Tsai , linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3] iio: light: cm32181: Unregister second I2C client if present Date: Thu, 23 Feb 2023 00:24:08 +0800 Message-Id: <20230222162408.1996023-1-kai.heng.feng@canonical.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org If a second dummy client that talks to the actual I2C address was created in probe(), there should be a proper cleanup on driver and device removal to avoid leakage. So unregister the dummy client via another callback. Suggested-by: Hans de Goede Fixes: c1e62062ff54 ("iio: light: cm32181: Handle CM3218 ACPI devices with 2 I2C resources") Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2152281 Signed-off-by: Kai-Heng Feng Reviewed-by: Hans de Goede --- v3: - Use devm_add_action_or_reset() in a correct place. - Wording. v2: - Use devm_add_action_or_reset() instead of remove() callback to avoid race. drivers/iio/light/cm32181.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/iio/light/cm32181.c b/drivers/iio/light/cm32181.c index b1674a5bfa368..b3da7a517aaea 100644 --- a/drivers/iio/light/cm32181.c +++ b/drivers/iio/light/cm32181.c @@ -429,6 +429,14 @@ static const struct iio_info cm32181_info = { .attrs = &cm32181_attribute_group, }; +static void cm32181_unregister_dummy_client(void *data) +{ + struct i2c_client *client = data; + + /* Unregister the dummy client */ + i2c_unregister_device(client); +} + static int cm32181_probe(struct i2c_client *client) { struct device *dev = &client->dev; @@ -460,6 +468,12 @@ static int cm32181_probe(struct i2c_client *client) client = i2c_acpi_new_device(dev, 1, &board_info); if (IS_ERR(client)) return PTR_ERR(client); + + ret = devm_add_action_or_reset(dev, cm32181_unregister_dummy_client, client); + if (ret) { + dev_err(dev, "%s: add devres action failed\n", __func__); + return ret; + } } cm32181 = iio_priv(indio_dev);