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 13E562D8DC4; Thu, 2 Jul 2026 16:54:28 +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=1783011269; cv=none; b=eCDb6bJdQMsAtFhxegXji+38HEphWe/h6DQiPuNjkrWn1XupI9Bc8LBDnIim9DjYRZ1UMZofYpCsdC1wAkWK1FRkQpyZSgONsjGofT7GvoUyWnDgrjxNshiVCE2uQ0jsoveFDKO3BXJJ9TRoISKEHyqcYRRiKT+j1eayfI5oBU8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783011269; c=relaxed/simple; bh=hL0M/ftwnaeYDHHA9xxZgDRpSTbMFp2Xdi1yHIWjJR4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=I3HbaV6sUt2wiLFvuSvjGIJneYBPoqSlRHm+3/fyehkXjLsKxGFnDXAq4sca5U0c6/gabneISGDrzFn5aXAIMZq8tZ7VMle04Uj8KZ2feB0lD4a1ISbJrtn5uzL+ewfE0dRmSpTxNhOK2ekNPJEH24bQqyPRutbB0b9ebpRytBU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=0BeFrsNu; 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="0BeFrsNu" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7A6841F000E9; Thu, 2 Jul 2026 16:54:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1783011268; bh=TXQV0SHlEPGfmthBPkyPycvnziEfCdHexBTyQPEHCwA=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=0BeFrsNu/8BWJo1kSXJ+JPY1m1bRkPtGphcaoi8tXW63OCQgPn/KxX85stTuq4eNJ Pi1nkqkcRL4iqlLviBli7S5o3GMbE2hj46hwaKKCM3JSXECyjDvvE9chnA7WTlIvdC N7zqtj2XczMuhWxGSZ/bBZ1l+D0y/kB2iV5f+pps= 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 6.18 042/108] NTB: epf: Avoid pci_iounmap() with offset when PEER_SPAD and CONFIG share BAR Date: Thu, 2 Jul 2026 18:20:39 +0200 Message-ID: <20260702155112.980307660@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260702155112.110058792@linuxfoundation.org> References: <20260702155112.110058792@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 6.18-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);