Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752837Ab2EYOCl (ORCPT ); Fri, 25 May 2012 10:02:41 -0400 Received: from goliath.siemens.de ([192.35.17.28]:23246 "EHLO goliath.siemens.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751242Ab2EYOCj (ORCPT ); Fri, 25 May 2012 10:02:39 -0400 Message-ID: <4FBF90E5.8030800@siemens.com> Date: Fri, 25 May 2012 11:02:13 -0300 From: Jan Kiszka User-Agent: Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666 MIME-Version: 1.0 To: "linux-pci@vger.kernel.org" , Bjorn Helgaas , Alexey Kardashevskiy CC: Linux Kernel Mailing List , Alex Williamson , Benjamin Herrenschmidt , David Gibson , Alexander Graf , kvm Subject: [PATCH] PCI: Mark INTx masking support of Chelsio T310 10GbE NIC as broken Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2541 Lines: 73 According to Alexey, the T310 does not properly support INTx masking as it fails to keep the PCI_STATUS_INTERRUPT bit updated once the interrupt is masked. Mark this adapter as broken so that pci_intx_mask_supported won't report it as compatible. Reported-by: Alexey Kardashevskiy Signed-off-by: Jan Kiszka --- Alexey, please test if this catches your case correctly. drivers/pci/pci.c | 3 +++ drivers/pci/quirks.c | 12 ++++++++++++ include/linux/pci.h | 2 ++ 3 files changed, 17 insertions(+), 0 deletions(-) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 8f16900..3a1aeb5 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -2876,6 +2876,9 @@ bool pci_intx_mask_supported(struct pci_dev *dev) bool mask_supported = false; u16 orig, new; + if (dev->broken_intx_masking) + return false; + pci_cfg_access_lock(dev); pci_read_config_word(dev, PCI_COMMAND, &orig); diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 2a75216..151e174 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -2929,6 +2929,18 @@ static void __devinit disable_igfx_irq(struct pci_dev *dev) DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0102, disable_igfx_irq); DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x010a, disable_igfx_irq); +/* + * Some devices may pass our check in pci_intx_mask_supported if + * PCI_COMMAND_INTX_DISABLE works though they actually do not properly + * support this feature. + */ +static void __devinit quirk_broken_intx_masking(struct pci_dev *dev) +{ + dev->broken_intx_masking = 1; +} +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, 0x0010, + quirk_broken_intx_masking); + static void pci_do_fixups(struct pci_dev *dev, struct pci_fixup *f, struct pci_fixup *end) { diff --git a/include/linux/pci.h b/include/linux/pci.h index 17b7b5b..c7cfd73 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -324,6 +324,8 @@ struct pci_dev { unsigned int is_hotplug_bridge:1; unsigned int __aer_firmware_first_valid:1; unsigned int __aer_firmware_first:1; + unsigned int broken_intx_masking:1; /* device's INTx masking + support is not working */ pci_dev_flags_t dev_flags; atomic_t enable_cnt; /* pci_enable_device has been called */ -- 1.7.3.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/