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 v6 8/8] PCI: Skip Enhanced Allocation (EA) initialization for VF device
Date: Fri, 16 Aug 2019 17:10:22 -0700 [thread overview]
Message-ID: <336c3f97a226f936ee3581b33d40ba00a8a7caa0.1565997310.git.sathyanarayanan.kuppuswamy@linux.intel.com> (raw)
In-Reply-To: <cover.1565997310.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 1b27b5af3d55..266600a11769 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -3025,6 +3025,13 @@ 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:[~2019-08-17 0:13 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-17 0:10 [PATCH v6 0/8] Fix PF/VF dependency issue sathyanarayanan.kuppuswamy
2019-08-17 0:10 ` [PATCH v6 1/8] PCI/ATS: Fix pci_prg_resp_pasid_required() dependency issues sathyanarayanan.kuppuswamy
2019-08-17 0:10 ` [PATCH v6 2/8] PCI/ATS: Cache PRI capability check result sathyanarayanan.kuppuswamy
2019-08-17 0:10 ` [PATCH v6 3/8] PCI/ATS: Cache PASID " sathyanarayanan.kuppuswamy
2019-08-17 0:10 ` [PATCH v6 4/8] PCI/IOV: Add pci_physfn_reslock/unlock() interfaces sathyanarayanan.kuppuswamy
2019-08-17 0:10 ` [PATCH v6 5/8] PCI/ATS: Add PRI support for PCIe VF devices sathyanarayanan.kuppuswamy
2019-08-17 0:10 ` [PATCH v6 6/8] PCI/ATS: Add PASID " sathyanarayanan.kuppuswamy
2019-08-17 0:10 ` [PATCH v6 7/8] PCI/ATS: Disable PF/VF ATS service independently sathyanarayanan.kuppuswamy
2019-08-17 0:10 ` sathyanarayanan.kuppuswamy [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=336c3f97a226f936ee3581b33d40ba00a8a7caa0.1565997310.git.sathyanarayanan.kuppuswamy@linux.intel.com \
--to=sathyanarayanan.kuppuswamy@linux.intel.com \
--cc=ashok.raj@intel.com \
--cc=bhelgaas@google.com \
--cc=keith.busch@intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).