From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793210817; b=PzofFw/S5o8GRU7sz6V8jRrWP9AbTj2zL2zps+8M5VyFf6aMPdxRxOOpD1UYrqudr81N AdnHTx+i04QRLqHKflS1wqS5FOClrtFLBhPYjjoXqRf36pxPtySBJpk11TEduYc53qiOV FRR8bd/oTV11MQQDNXEYm9iqaC32op2bfp8Dm0UsxQDRrOaKbVpqAtydekODqvEzUsAWv QSvAGSj4v/6CSPW+QH7ljFPw4pFEPXb4vQrP5UjXlAVneR1XW1aZUkpu9H+yLbhodzuVo z5OdsPft/D4PANZoOBTgoT7vqU/OExM9U2+2IVw4a7fKJOesr+zov6Ll8L5bWM3U3dA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793210817; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=tlYwtDPXEaAfbnmPmxiUSHM771olpcpKFFeYIZWYHqo=; b=fqtn0dta8ZXSj4N8JVIlag0CfNhpc7QXeuecw1zi8OoUxcZkNMDLdYLcbxxTqmFF0LZM m0aa7oK+RLXsxzVLHMGFd6+KNYh9D9TXOm1FKApNSFrvEgqKfQ6lHL3I97rShucENCEtZ YUl2IxnZLj5zLogdzyJr4dJJpdK9FsCmK1w4ILpf9LA9HIe4PypaOmqmL9ejjyDXn3YG3 2BpPwQb/y1HS3/piwRodWoGtvs7yDwcp+Bj6813CCdRzXM77Y/AALzM6DyzA6TwLwQ9Tj ip1n/DICP074tXZ/k+TeweMY0kCT+s9IXGUEvrlfxqRsKpc4g4fjEkz3UwLi9N3etiw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b="bp6/A40D"; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5227D606A322; Wed, 28 Oct 2026 18:06:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=bp6/A40D Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9EA7E1F01828; Wed, 28 Oct 2026 18:06:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1793210817; bh=tlYwtDPXEaAfbnmPmxiUSHM771olpcpKFFeYIZWYHqo=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=bp6/A40D0ryFMsKpnF4MmtzPcR7Wz06U9w3+eKtKOat021NCKBaN8RtAbtF+999gZ a1hE9iioIXsoIebYL4OPLu01WX5lnX2+QyYpyEG3H3rCClvE0zHqrkYRqFEY6WC6Lp lz/79za/YJucjYw54UteG6IsLTRKWEfPuP9jXEUQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Zev Weiss , Miquel Raynal , Sasha Levin Subject: [PATCH 5.15 158/571] mtd: core: clear out unregistered devices a bit more Date: Wed, 28 Oct 2026 17:55:05 +0100 Message-ID: <20261028170011.765573663@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261028170008.009143722@linuxfoundation.org> References: <20261028170008.009143722@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: patches@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Zev Weiss [ Upstream commit 00596576a05145a1b5672897a82ef87af00becf4 ] This allows an MTD device that has been unregistered to be easily re-registered later without triggering spurious "already registered" warnings in mtd_device_parse_register() and add_mtd_device(). Signed-off-by: Zev Weiss Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20211015185049.3318-1-zev@bewilderbeest.net Stable-dep-of: 12b31d1acd20 ("mtd: core: call _get_device() with the master MTD") Signed-off-by: Sasha Levin --- drivers/mtd/mtdcore.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c index 16077e5a2df1c..cd49719ca3410 100644 --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c @@ -750,6 +750,9 @@ int del_mtd_device(struct mtd_info *mtd) device_unregister(&mtd->dev); + /* Clear dev so mtd can be safely re-registered later if desired */ + memset(&mtd->dev, 0, sizeof(mtd->dev)); + idr_remove(&mtd_idr, mtd->index); of_node_put(mtd_get_of_node(mtd)); @@ -1031,8 +1034,10 @@ int mtd_device_unregister(struct mtd_info *master) { int err; - if (master->_reboot) + if (master->_reboot) { unregister_reboot_notifier(&master->reboot_notifier); + memset(&master->reboot_notifier, 0, sizeof(master->reboot_notifier)); + } if (master->otp_user_nvmem) nvmem_unregister(master->otp_user_nvmem); -- 2.53.0