From patchwork Sat Jun 29 12:42:14 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Niklas Cassel X-Patchwork-Id: 13716918 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 F33552574B; Sat, 29 Jun 2024 12:42:42 +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=1719664963; cv=none; b=YmrVjhshtDMBEwAPN29yvWJjc+flLHRStivM+vb5te5seFtaLEXXK1CWL3rGud+WtXgbyjB+7oevAuGNhWrK0GBRS4jskgqs2fRz9uBdjdmTUp3mBb0W0eMpaCoHaQWHDL8gAO+ppczUQNYOEUZ4O5MkH6/jadkhCpORxkLatxU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719664963; c=relaxed/simple; bh=YE2wYJ2kCjz6uRVo49Ho3nZ45FD637M/W1oPclhVsow=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=VbxRLc6cf21JAlvaQ3aSe0QXzsVXAZ75bLjBaexxVlBr7xzZ8FoVDKk5Sve8e+lurGxCp/YZ3yyzytAWbC3kDaaJJ22qqjUbRkHg0lML4ngcrs3kArW39gXDCfAd1jqQ0gr13MbOaZpqhPyN374iGMcZTu6Qr/3Q+pHIfDtGg44= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=T8w3vZIh; 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="T8w3vZIh" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DD8B8C4AF09; Sat, 29 Jun 2024 12:42:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1719664962; bh=YE2wYJ2kCjz6uRVo49Ho3nZ45FD637M/W1oPclhVsow=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=T8w3vZIhVu84/AEdu/0R2YPl32MebtlulpnoUTsf1nKLxns3JUWjUkxaHWs1uQobJ N89mEY7Mm06y7NsJIxhA0RMikpI4/+CBAhLi9Xnl1AUZE6OFQrOIoJOiwtui3YTRCB VhKyRC4JynbB2azhAJpslgYQixJPJ6PzTihhHzuWjLS+f2u33kMnW33bRYkeKij9oh ZTjR01/kzWMK0Evr6oW8pK+t+d6/MTaGE3az/InsRB3LhI2UQTkZZHd1uePgitSGfV Arijomt4jRcwujVnk/Y9r4hC/dgXXvLpmkK+FQiz/cm0KanxZCFTxD3hR79FFr5GbC sSo1qDiuVUJdQ== From: Niklas Cassel To: Damien Le Moal , Niklas Cassel , Jens Axboe , Kai-Heng Feng Cc: linux-scsi@vger.kernel.org, John Garry , Jason Yan , "Martin K. Petersen" , "James E.J. Bottomley" , stable@vger.kernel.org, Hannes Reinecke , linux-ide@vger.kernel.org Subject: [PATCH 4/4] ata: ahci: Clean up sysfs file on error Date: Sat, 29 Jun 2024 14:42:14 +0200 Message-ID: <20240629124210.181537-10-cassel@kernel.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240629124210.181537-6-cassel@kernel.org> References: <20240629124210.181537-6-cassel@kernel.org> Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2648; i=cassel@kernel.org; h=from:subject; bh=YE2wYJ2kCjz6uRVo49Ho3nZ45FD637M/W1oPclhVsow=; b=owGbwMvMwCV2MsVw8cxjvkWMp9WSGNIaGDUiIxckPH6ezttj94BvWV/kp9Cdb48lvc5PlO+Lm v3vZLdxRykLgxgXg6yYIovvD5f9xd3uU44r3rGBmcPKBDKEgYtTACbStJ/hn8UBW1l/0Yf3JnJ5 /lvLUDFxwbLTud/PamQfZrhdfddE9wUjwya772YeLnuaL8czB2w++sY5bXnJyg+3dn2717FHSOb gB14A X-Developer-Key: i=cassel@kernel.org; a=openpgp; fpr=5ADE635C0E631CBBD5BE065A352FE6582ED9B5DA .probe() (ahci_init_one()) calls sysfs_add_file_to_group(), however, if probe() fails after this call, we currently never call sysfs_remove_file_from_group(). (The sysfs_remove_file_from_group() call in .remove() (ahci_remove_one()) does not help, as .remove() is not called on .probe() error.) Thus, if probe() fails after the sysfs_add_file_to_group() call, the next time we insmod the module we will get: sysfs: cannot create duplicate filename '/devices/pci0000:00/0000:00:04.0/remapped_nvme' CPU: 11 PID: 954 Comm: modprobe Not tainted 6.10.0-rc5 #43 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-2.fc40 04/01/2014 Call Trace: dump_stack_lvl+0x5d/0x80 sysfs_warn_dup.cold+0x17/0x23 sysfs_add_file_mode_ns+0x11a/0x130 sysfs_add_file_to_group+0x7e/0xc0 ahci_init_one+0x31f/0xd40 [ahci] Fixes: 894fba7f434a ("ata: ahci: Add sysfs attribute to show remapped NVMe device count") Cc: stable@vger.kernel.org Reviewed-by: Damien Le Moal Reviewed-by: Hannes Reinecke Signed-off-by: Niklas Cassel --- drivers/ata/ahci.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c index 5eb38fbbbecd..fc6fd583faf8 100644 --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -1975,8 +1975,10 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map)); host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports); - if (!host) - return -ENOMEM; + if (!host) { + rc = -ENOMEM; + goto err_rm_sysfs_file; + } host->private_data = hpriv; if (ahci_init_msi(pdev, n_ports, hpriv) < 0) { @@ -2031,11 +2033,11 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) /* initialize adapter */ rc = ahci_configure_dma_masks(pdev, hpriv); if (rc) - return rc; + goto err_rm_sysfs_file; rc = ahci_pci_reset_controller(host); if (rc) - return rc; + goto err_rm_sysfs_file; ahci_pci_init_controller(host); ahci_pci_print_info(host); @@ -2044,10 +2046,15 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) rc = ahci_host_activate(host, &ahci_sht); if (rc) - return rc; + goto err_rm_sysfs_file; pm_runtime_put_noidle(&pdev->dev); return 0; + +err_rm_sysfs_file: + sysfs_remove_file_from_group(&pdev->dev.kobj, + &dev_attr_remapped_nvme.attr, NULL); + return rc; } static void ahci_shutdown_one(struct pci_dev *pdev)