From: sathyanarayanan.kuppuswamy@linux.intel.com
To: bhelgaas@google.com
Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
ashok.raj@intel.com, keith.busch@intel.com,
sathyanarayanan.kuppuswamy@linux.intel.com
Subject: [PATCH v3 7/7] PCI: Skip Enhanced Allocation (EA) initialization for VF device
Date: Thu, 20 Jun 2019 13:38:48 -0700 [thread overview]
Message-ID: <6ecc59da77bbcacbee63230f121b9af5758f59e9.1561061640.git.sathyanarayanan.kuppuswamy@linux.intel.com> (raw)
In-Reply-To: <cover.1561061640.git.sathyanarayanan.kuppuswamy@linux.intel.com>
From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
As per PCIe r4.0, sec 9.3.6, VF must not implement Enhanced Allocation
Capability. So skip pci_ea_init() for virtual devices.
Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Keith Busch <keith.busch@intel.com>
Suggested-by: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
---
drivers/pci/pci.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 8abc843b1615..c299ab470351 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -2986,6 +2986,13 @@ void pci_ea_init(struct pci_dev *dev)
int offset;
int i;
+ /*
+ * Per PCIe r4.0, sec 9.3.6, VF must not implement Enhanced
+ * Allocation Capability.
+ */
+ if (dev->is_virtfn)
+ return;
+
/* find PCI EA capability in list */
ea = pci_find_capability(dev, PCI_CAP_ID_EA);
if (!ea)
--
2.21.0
prev parent reply other threads:[~2019-06-20 20:41 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-20 20:38 [PATCH v3 0/7] Fix PF/VF dependency issue sathyanarayanan.kuppuswamy
2019-06-20 20:38 ` [PATCH v3 1/7] PCI/ATS: Fix pci_prg_resp_pasid_required() dependency issues sathyanarayanan.kuppuswamy
2019-07-03 17:56 ` Bjorn Helgaas
2019-07-03 18:23 ` sathyanarayanan kuppuswamy
2019-06-20 20:38 ` [PATCH v3 2/7] PCI/ATS: Initialize PRI in pci_ats_init() sathyanarayanan.kuppuswamy
2019-06-20 20:38 ` [PATCH v3 3/7] PCI/ATS: Initialize PASID " sathyanarayanan.kuppuswamy
2019-06-20 20:38 ` [PATCH v3 4/7] PCI/ATS: Add PRI support for PCIe VF devices sathyanarayanan.kuppuswamy
2019-06-20 20:38 ` [PATCH v3 5/7] PCI/ATS: Add PASID " sathyanarayanan.kuppuswamy
2019-06-20 20:38 ` [PATCH v3 6/7] PCI/ATS: Disable PF/VF ATS service independently sathyanarayanan.kuppuswamy
2019-06-20 20:38 ` sathyanarayanan.kuppuswamy [this message]
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