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From: Sean V Kelley <seanvk.dev@oregontracks.org>
To: bhelgaas@google.com, Jonathan.Cameron@huawei.com,
	rafael.j.wysocki@intel.com, ashok.raj@intel.com,
	tony.luck@intel.com, sathyanarayanan.kuppuswamy@intel.com,
	qiuxu.zhuo@intel.com
Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
	Sean V Kelley <sean.v.kelley@intel.com>
Subject: [PATCH v8 07/14] PCI/ERR: Limit AER resets in pcie_do_recovery()
Date: Fri,  2 Oct 2020 11:47:28 -0700
Message-ID: <20201002184735.1229220-8-seanvk.dev@oregontracks.org> (raw)
In-Reply-To: <20201002184735.1229220-1-seanvk.dev@oregontracks.org>

From: Sean V Kelley <sean.v.kelley@intel.com>

In some cases a bridge may not exist as the hardware
controlling may be handled only by firmware and so is
not visible to the OS. This scenario is also possible
in future use cases involving non-native use of RCECs
by firmware. So explicitly apply conditional logic
around these resets by limiting them to root ports and
downstream ports.

Signed-off-by: Sean V Kelley <sean.v.kelley@intel.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 drivers/pci/pcie/err.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/pci/pcie/err.c b/drivers/pci/pcie/err.c
index 9b2130725ab6..5ff1afa4763d 100644
--- a/drivers/pci/pcie/err.c
+++ b/drivers/pci/pcie/err.c
@@ -218,9 +218,12 @@ pci_ers_result_t pcie_do_recovery(struct pci_dev *dev,
 	pci_dbg(dev, "broadcast resume message\n");
 	pci_walk_bridge(bridge, report_resume, &status);
 
-	if (pcie_aer_is_native(bridge))
-		pcie_clear_device_status(bridge);
-	pci_aer_clear_nonfatal_status(bridge);
+	if (type == PCI_EXP_TYPE_ROOT_PORT ||
+	    type == PCI_EXP_TYPE_DOWNSTREAM) {
+		if (pcie_aer_is_native(bridge))
+			pcie_clear_device_status(bridge);
+		pci_aer_clear_nonfatal_status(bridge);
+	}
 	pci_info(dev, "device recovery successful\n");
 	return status;
 
-- 
2.28.0


  parent reply index

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-02 18:47 [PATCH v8 00/14] Add RCEC handling to PCI/AER Sean V Kelley
2020-10-02 18:47 ` [PATCH v8 01/14] PCI/RCEC: Add RCEC class code and extended capability Sean V Kelley
2020-10-02 18:47 ` [PATCH v8 02/14] PCI/RCEC: Bind RCEC devices to the Root Port driver Sean V Kelley
2020-10-02 18:47 ` [PATCH v8 03/14] PCI/RCEC: Cache RCEC capabilities in pci_init_capabilities() Sean V Kelley
2020-10-02 18:47 ` [PATCH v8 04/14] PCI/ERR: Rename reset_link() to reset_subordinate_device() Sean V Kelley
2020-10-02 18:47 ` [PATCH v8 05/14] PCI/ERR: Use "bridge" for clarity in pcie_do_recovery() Sean V Kelley
2020-10-02 18:47 ` [PATCH v8 06/14] PCI/ERR: Add pci_walk_bridge() to pcie_do_recovery() Sean V Kelley
2020-10-02 18:47 ` Sean V Kelley [this message]
2020-10-02 18:47 ` [PATCH v8 08/14] PCI/AER: Extend AER error handling to RCECs Sean V Kelley
2020-10-09 21:27   ` Bjorn Helgaas
2020-10-09 21:54     ` Sean V Kelley
2020-10-02 18:47 ` [PATCH v8 09/14] PCI/AER: Apply function level reset to RCiEP on fatal error Sean V Kelley
2020-10-02 18:47 ` [PATCH v8 10/14] PCI/RCEC: Add pcie_link_rcec() to associate RCiEPs Sean V Kelley
2020-10-02 18:47 ` [PATCH v8 11/14] PCI/RCEC: Add RCiEP's linked RCEC to AER/ERR Sean V Kelley
2020-10-09 17:57   ` Bjorn Helgaas
2020-10-09 18:26     ` Sean V Kelley
2020-10-09 18:34       ` Sean V Kelley
2020-10-09 18:53         ` Sean V Kelley
2020-10-09 19:48           ` Sean V Kelley
2020-10-09 21:30     ` Bjorn Helgaas
2020-10-09 22:07       ` Sean V Kelley
2020-10-09 23:51         ` Kelley, Sean V
2020-10-12 22:58           ` Bjorn Helgaas
2020-10-13 16:55             ` Sean V Kelley
2020-10-02 18:47 ` [PATCH v8 12/14] PCI/AER: Add pcie_walk_rcec() to RCEC AER handling Sean V Kelley
2020-10-02 18:47 ` [PATCH v8 13/14] PCI/PME: Add pcie_walk_rcec() to RCEC PME handling Sean V Kelley
2020-10-02 18:47 ` [PATCH v8 14/14] PCI/AER: Add RCEC AER error injection support Sean V Kelley
2020-10-09 15:53 ` [PATCH v8 00/14] Add RCEC handling to PCI/AER Bjorn Helgaas

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