From mboxrd@z Thu Jan 1 00:00:00 1970 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 DA674207A08 for ; Fri, 20 Jun 2025 09:12:27 +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=1750410747; cv=none; b=e9YtUSpsV/1G3ZCwXcoAqdoxAYJgwLkQ5OMZZUeNJuLynNGHn03rV9j+xw8NRCDJcEaSp2wrmvP8x9CXRMe/xOCf+AnAzLAXd2GrnLAYb3PTU/Su0umj9zf1yS3Zf1yuKayIvI0+0mrKLFqpGEGNqti1VKl2bVabglCV4+uxNWI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750410747; c=relaxed/simple; bh=/95Fk+1qvTRztmpH3S9+HAUl6UbWr71OJNyd/56EP0Y=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=BMHG5YIjJx70e++ALl6tQTYELLQuI6fHQqwbLGrcS4UDRbPDqnGxDSEeZUUBTkkXmpfAuXOoSCG2rQcCtIDP5IYGITmdjOvSMN6/R47ZPoUQaH40BvateEr5qLznXvbAa/XEgoNdrqSaNKK0x+OpHf831yvIvoRoozCsEy0RetA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=lZGnygG5; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="lZGnygG5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 69910C4CEE3; Fri, 20 Jun 2025 09:12:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1750410747; bh=/95Fk+1qvTRztmpH3S9+HAUl6UbWr71OJNyd/56EP0Y=; h=Subject:To:Cc:From:Date:From; b=lZGnygG5jtsHPy5Ih3jn0879xHfzkRn4suTT7mfw+3YCD7HQm8fFJucvSOz8uh0N9 pMheTFNTsyxi7rOgyzcnBkc2fH/x3Zvq0PCJyHi3aeEdtPP9jiSmZYm7KhPsKBvy00 R7UMW8HSP75M6Wp1h4iHnJaMq0Yj21MoUmDYW8SE= Subject: FAILED: patch "[PATCH] PCI: dwc: ep: Correct PBA offset in .set_msix() callback" failed to apply to 5.15-stable tree To: cassel@kernel.org,bhelgaas@google.com,dlemoal@kernel.org,manivannan.sadhasivam@linaro.org,wilfred.mallawa@wdc.com Cc: From: Date: Fri, 20 Jun 2025 11:12:16 +0200 Message-ID: <2025062016-december-primary-81a1@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 810276362bad172d063d1f6be1cc2cb425b90103 # git commit -s git send-email --to '' --in-reply-to '2025062016-december-primary-81a1@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 810276362bad172d063d1f6be1cc2cb425b90103 Mon Sep 17 00:00:00 2001 From: Niklas Cassel Date: Wed, 14 May 2025 09:43:14 +0200 Subject: [PATCH] PCI: dwc: ep: Correct PBA offset in .set_msix() callback While dw_pcie_ep_set_msix() writes the Table Size field correctly (N-1), the calculation of the PBA offset is wrong because it calculates space for (N-1) entries instead of N. This results in the following QEMU error when using PCI passthrough on a device which relies on the PCI endpoint subsystem: failed to add PCI capability 0x11[0x50]@0xb0: table & pba overlap, or they don't fit in BARs, or don't align Fix the calculation of PBA offset in the MSI-X capability. [bhelgaas: more specific subject and commit log] Fixes: 83153d9f36e2 ("PCI: endpoint: Fix ->set_msix() to take BIR and offset as arguments") Signed-off-by: Niklas Cassel Signed-off-by: Manivannan Sadhasivam Signed-off-by: Bjorn Helgaas Reviewed-by: Wilfred Mallawa Reviewed-by: Damien Le Moal Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20250514074313.283156-9-cassel@kernel.org diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c index 1a0bf9341542..24026f3f3413 100644 --- a/drivers/pci/controller/dwc/pcie-designware-ep.c +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c @@ -585,6 +585,7 @@ static int dw_pcie_ep_set_msix(struct pci_epc *epc, u8 func_no, u8 vfunc_no, struct dw_pcie *pci = to_dw_pcie_from_ep(ep); struct dw_pcie_ep_func *ep_func; u32 val, reg; + u16 actual_interrupts = interrupts + 1; ep_func = dw_pcie_ep_get_func_from_ep(ep, func_no); if (!ep_func || !ep_func->msix_cap) @@ -595,7 +596,7 @@ static int dw_pcie_ep_set_msix(struct pci_epc *epc, u8 func_no, u8 vfunc_no, reg = ep_func->msix_cap + PCI_MSIX_FLAGS; val = dw_pcie_ep_readw_dbi(ep, func_no, reg); val &= ~PCI_MSIX_FLAGS_QSIZE; - val |= interrupts; + val |= interrupts; /* 0's based value */ dw_pcie_writew_dbi(pci, reg, val); reg = ep_func->msix_cap + PCI_MSIX_TABLE; @@ -603,7 +604,7 @@ static int dw_pcie_ep_set_msix(struct pci_epc *epc, u8 func_no, u8 vfunc_no, dw_pcie_ep_writel_dbi(ep, func_no, reg, val); reg = ep_func->msix_cap + PCI_MSIX_PBA; - val = (offset + (interrupts * PCI_MSIX_ENTRY_SIZE)) | bir; + val = (offset + (actual_interrupts * PCI_MSIX_ENTRY_SIZE)) | bir; dw_pcie_ep_writel_dbi(ep, func_no, reg, val); dw_pcie_dbi_ro_wr_dis(pci);