From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 5513F341AC7; Sat, 30 May 2026 17:49:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780163354; cv=none; b=sRTI4abBHkIF0Z/w7zyT+3n9ojwxrF28TkmMD5boSx308FhPKpE0mZsy9eSiT4DJb9tPVbZpRNHhSoMPF5ojimjSjbgWOTGxKToOnCniZdOzAGyP3yhYEpiZCyf9XZCwdWNPBgB2AeBLQ48enLDqCY0tRf5AfCIBorix61FXEWo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780163354; c=relaxed/simple; bh=HRa7fc5kPCiMGJtiK1T2Xzg/zKYzTDLhimq0XVu8ky0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=XPc9hDR6Pcj7FYAW6tID2oXjR90iT1ceoH6sidHrwy7jIqersRjGo5+WDkwSyGrsqqjuwYmiIO9AX6fOLHL4LFl/s7DWUH6aV9iQCoMeikOmi6lI9BQDOduJc3najGRlLGmYTRIWznKtNbaP4dw8Q/EZWYO22PVWImPXOtDEclU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=fvO3PpPO; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="fvO3PpPO" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6237E1F00893; Sat, 30 May 2026 17:49:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1780163353; bh=+O9wfThzQx2k5hoKk5BdkWAfWLzimD1o+BdXy/pXqpo=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=fvO3PpPORzxjggldgRiI8cHB9vEQmD2CgqWu5QC3yiGos0MOQ5N01+eDi3UV18l87 PIVnlNdcKbSDS3BBS2MPXlC7T3xW/CxWL87UqBPGKjAEKa8qspjUDe8rjttaiaZInG pVFlMYWqKlAriKX86qMcHkXYVEIQ1dS5ICyJ9q70= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Koichiro Den , Manivannan Sadhasivam , Frank Li Subject: [PATCH 5.15 202/776] PCI: endpoint: pci-epf-ntb: Remove duplicate resource teardown Date: Sat, 30 May 2026 17:58:36 +0200 Message-ID: <20260530160245.731819440@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260530160240.228940103@linuxfoundation.org> References: <20260530160240.228940103@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev 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: Koichiro Den commit 3446beddba450c8d6f9aca2f028712ac527fead3 upstream. epf_ntb_epc_destroy() duplicates the teardown that the caller is supposed to do later. This leads to an oops when .allow_link fails or when .drop_link is performed. Remove the helper. Also drop pci_epc_put(). EPC device refcounting is tied to configfs EPC group lifetime, and pci_epc_put() in the .drop_link path is sufficient. Fixes: 8b821cf76150 ("PCI: endpoint: Add EP function driver to provide NTB functionality") Signed-off-by: Koichiro Den Signed-off-by: Manivannan Sadhasivam Reviewed-by: Frank Li Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20260226084142.2226875-3-den@valinux.co.jp Signed-off-by: Greg Kroah-Hartman --- drivers/pci/endpoint/functions/pci-epf-ntb.c | 56 --------------------------- 1 file changed, 2 insertions(+), 54 deletions(-) --- a/drivers/pci/endpoint/functions/pci-epf-ntb.c +++ b/drivers/pci/endpoint/functions/pci-epf-ntb.c @@ -1495,47 +1495,6 @@ err_alloc_peer_mem: } /** - * epf_ntb_epc_destroy_interface() - Cleanup NTB EPC interface - * @ntb: NTB device that facilitates communication between HOST1 and HOST2 - * @type: PRIMARY interface or SECONDARY interface - * - * Unbind NTB function device from EPC and relinquish reference to pci_epc - * for each of the interface. - */ -static void epf_ntb_epc_destroy_interface(struct epf_ntb *ntb, - enum pci_epc_interface_type type) -{ - struct epf_ntb_epc *ntb_epc; - struct pci_epc *epc; - struct pci_epf *epf; - - if (type < 0) - return; - - epf = ntb->epf; - ntb_epc = ntb->epc[type]; - if (!ntb_epc) - return; - epc = ntb_epc->epc; - pci_epc_remove_epf(epc, epf, type); - pci_epc_put(epc); -} - -/** - * epf_ntb_epc_destroy() - Cleanup NTB EPC interface - * @ntb: NTB device that facilitates communication between HOST1 and HOST2 - * - * Wrapper for epf_ntb_epc_destroy_interface() to cleanup all the NTB interfaces - */ -static void epf_ntb_epc_destroy(struct epf_ntb *ntb) -{ - enum pci_epc_interface_type type; - - for (type = PRIMARY_INTERFACE; type <= SECONDARY_INTERFACE; type++) - epf_ntb_epc_destroy_interface(ntb, type); -} - -/** * epf_ntb_epc_create_interface() - Create and initialize NTB EPC interface * @ntb: NTB device that facilitates communication between HOST1 and HOST2 * @epc: struct pci_epc to which a particular NTB interface should be associated @@ -1614,15 +1573,8 @@ static int epf_ntb_epc_create(struct epf ret = epf_ntb_epc_create_interface(ntb, epf->sec_epc, SECONDARY_INTERFACE); - if (ret) { + if (ret) dev_err(dev, "SECONDARY intf: Fail to create NTB EPC\n"); - goto err_epc_create; - } - - return 0; - -err_epc_create: - epf_ntb_epc_destroy_interface(ntb, PRIMARY_INTERFACE); return ret; } @@ -1887,7 +1839,7 @@ static int epf_ntb_bind(struct pci_epf * ret = epf_ntb_init_epc_bar(ntb); if (ret) { dev_err(dev, "Failed to create NTB EPC\n"); - goto err_bar_init; + return ret; } ret = epf_ntb_config_spad_bar_alloc_interface(ntb); @@ -1909,9 +1861,6 @@ static int epf_ntb_bind(struct pci_epf * err_bar_alloc: epf_ntb_config_spad_bar_free(ntb); -err_bar_init: - epf_ntb_epc_destroy(ntb); - return ret; } @@ -1927,7 +1876,6 @@ static void epf_ntb_unbind(struct pci_ep epf_ntb_epc_cleanup(ntb); epf_ntb_config_spad_bar_free(ntb); - epf_ntb_epc_destroy(ntb); } #define EPF_NTB_R(_name) \