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 8635E3446A7; Thu, 2 Jul 2026 16:50:23 +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=1783011024; cv=none; b=GfH8MLF+sn/uQmdlWxIf2fphWyMECpk0009Dol5ijb7OzyhxvOX70eCY30N7Uni45SULfsj6YG3pQjYcb64Legp9s/rDnfANMHM5GyaTX/wF0IInez146Lxki7upr7T1PWpYFjinLvkrdEqOfxPtnyCE1xu3rpha/bj283b0u9M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783011024; c=relaxed/simple; bh=qmbGLjFAJZXiToJaPZMMxEIsEGq6xDwyWms6H5GS9Ps=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=T3nJh33RxDvB+QUqg3u5eTvsEKEFiHavcTyJA9n5hrSlVKgrwQsG+1kVLFFZzi9Jf/asj7GFP1dgdhRHENGSM19uaddFK4SvmVT3LAMkzQip+ouQvB3IFC7LQsE7SkvqvcBUgyEMeFgaqWz+Eb0VYrJE1hY/BoCX4Ui+X8khfIE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=ajWTtRtW; 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="ajWTtRtW" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EB8641F00A3A; Thu, 2 Jul 2026 16:50:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1783011023; bh=2mkwdx4IIIR1QVfSuRJcvQAm2rfUa09a0SOLJYVxRnc=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=ajWTtRtWrXi/sRMfLI9rFB4gA6pWC2Sr6e0L1JlkRhmwxYCT+xGxIK9B2Hqdb+r4F WyLt6Zo1kYmz6IMnFuDTKIlUHEt62UDS7yHehlQZt+TilFr9+uW35SyszdgoWbaBW2 cku+FJmwxtAWyL+o6jqLYpf0cBqq/AbVcwdsoK4k= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Frank Li , Koichiro Den , Dave Jiang , Jon Mason Subject: [PATCH 6.6 126/175] NTB: epf: Avoid pci_iounmap() with offset when PEER_SPAD and CONFIG share BAR Date: Thu, 2 Jul 2026 18:20:27 +0200 Message-ID: <20260702155118.407563391@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260702155115.766838875@linuxfoundation.org> References: <20260702155115.766838875@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 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Koichiro Den commit d876153680e3d721d385e554def919bce3d18c74 upstream. When BAR_PEER_SPAD and BAR_CONFIG share one PCI BAR, the module teardown path ends up calling pci_iounmap() on the same iomem with some offset, which is unnecessary and triggers a kernel warning like the following: Trying to vunmap() nonexistent vm area (0000000069a5ffe8) WARNING: mm/vmalloc.c:3470 at vunmap+0x58/0x68, CPU#5: modprobe/2937 [...] Call trace: vunmap+0x58/0x68 (P) iounmap+0x34/0x48 pci_iounmap+0x2c/0x40 ntb_epf_pci_remove+0x44/0x80 [ntb_hw_epf] pci_device_remove+0x48/0xf8 device_remove+0x50/0x88 device_release_driver_internal+0x1c8/0x228 driver_detach+0x50/0xb0 bus_remove_driver+0x74/0x100 driver_unregister+0x34/0x68 pci_unregister_driver+0x34/0xa0 ntb_epf_pci_driver_exit+0x14/0xfe0 [ntb_hw_epf] [...] Fix it by unmapping only when PEER_SPAD and CONFIG use difference bars. Cc: stable@vger.kernel.org Fixes: e75d5ae8ab88 ("NTB: epf: Allow more flexibility in the memory BAR map method") Reviewed-by: Frank Li Signed-off-by: Koichiro Den Reviewed-by: Dave Jiang Signed-off-by: Jon Mason Signed-off-by: Greg Kroah-Hartman --- drivers/ntb/hw/epf/ntb_hw_epf.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/ntb/hw/epf/ntb_hw_epf.c +++ b/drivers/ntb/hw/epf/ntb_hw_epf.c @@ -646,7 +646,8 @@ static void ntb_epf_deinit_pci(struct nt struct pci_dev *pdev = ndev->ntb.pdev; pci_iounmap(pdev, ndev->ctrl_reg); - pci_iounmap(pdev, ndev->peer_spad_reg); + if (ndev->barno_map[BAR_PEER_SPAD] != ndev->barno_map[BAR_CONFIG]) + pci_iounmap(pdev, ndev->peer_spad_reg); pci_iounmap(pdev, ndev->db_reg); pci_release_regions(pdev);