linux-kernel - [RFC PATCH 9/9] PCI/AER: Add RCEC AER error injection support

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Message-Id: <20200724172223.145608-10-sean.v.kelley@intel.com>
Date:   Fri, 24 Jul 2020 10:22:23 -0700
From:   Sean V Kelley <sean.v.kelley@...el.com>
To:     bhelgaas@...gle.com, Jonathan.Cameron@...wei.com,
        rjw@...ysocki.net, ashok.raj@...nel.org, tony.luck@...el.com,
        sathyanarayanan.kuppuswamy@...ux.intel.com
Cc:     linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        Qiuxu Zhuo <qiuxu.zhuo@...el.com>,
        Sean V Kelley <sean.v.kelley@...el.com>
Subject: [RFC PATCH 9/9] PCI/AER: Add RCEC AER error injection support

From: Qiuxu Zhuo <qiuxu.zhuo@...el.com>

The Root Complex Event Collectors(RCEC) appear as peers to Root Ports
and also have the AER capability. So add RCEC support to the current AER
error injection driver.

Co-developed-by: Sean V Kelley <sean.v.kelley@...el.com>
Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@...el.com>
Signed-off-by: Sean V Kelley <sean.v.kelley@...el.com>
---
 drivers/pci/pcie/aer_inject.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/pcie/aer_inject.c b/drivers/pci/pcie/aer_inject.c
index 21cc3d3387f7..5264847bd714 100644
--- a/drivers/pci/pcie/aer_inject.c
+++ b/drivers/pci/pcie/aer_inject.c
@@ -333,8 +333,11 @@ static int aer_inject(struct aer_error_inj *einj)
 	if (!dev)
 		return -ENODEV;
 	rpdev = pcie_find_root_port(dev);
+	/* If Root port not found, try to find an RCEC */
+	if (!rpdev)
+		rpdev = dev->rcec;
 	if (!rpdev) {
-		pci_err(dev, "Root port not found\n");
+		pci_err(dev, "Root port or RCEC not found\n");
 		ret = -ENODEV;
 		goto out_put;
 	}
-- 
2.27.0