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 06/14] PCI/ERR: Add pci_walk_bridge() to pcie_do_recovery()
Date: Fri, 2 Oct 2020 11:47:27 -0700 [thread overview]
Message-ID: <20201002184735.1229220-7-seanvk.dev@oregontracks.org> (raw)
In-Reply-To: <20201002184735.1229220-1-seanvk.dev@oregontracks.org>
From: Sean V Kelley <sean.v.kelley@intel.com>
Consolidate subordinate bus checks with pci_walk_bus()
into pci_walk_bridge() for walking below potentially
AER affected bridges.
Suggested-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Sean V Kelley <sean.v.kelley@intel.com>
---
drivers/pci/pcie/err.c | 29 ++++++++++++++++++++++-------
1 file changed, 22 insertions(+), 7 deletions(-)
diff --git a/drivers/pci/pcie/err.c b/drivers/pci/pcie/err.c
index e68ea5243ff2..9b2130725ab6 100644
--- a/drivers/pci/pcie/err.c
+++ b/drivers/pci/pcie/err.c
@@ -146,12 +146,28 @@ static int report_resume(struct pci_dev *dev, void *data)
return 0;
}
+/**
+ * pci_walk_bridge - walk bridges potentially AER affected
+ * @bridge bridge which may be a Port.
+ * @cb callback to be called for each device found
+ * @userdata arbitrary pointer to be passed to callback.
+ *
+ * If the device provided is a bridge, walk the subordinate bus,
+ * including any bridged devices on buses under this bus.
+ * Call the provided callback on each device found.
+ */
+static void pci_walk_bridge(struct pci_dev *bridge, int (*cb)(struct pci_dev *, void *),
+ void *userdata)
+{
+ if (bridge->subordinate)
+ pci_walk_bus(bridge->subordinate, cb, userdata);
+}
+
pci_ers_result_t pcie_do_recovery(struct pci_dev *dev,
pci_channel_state_t state,
pci_ers_result_t (*reset_subordinate_devices)(struct pci_dev *pdev))
{
pci_ers_result_t status = PCI_ERS_RESULT_CAN_RECOVER;
- struct pci_bus *bus;
struct pci_dev *bridge;
int type;
@@ -167,23 +183,22 @@ pci_ers_result_t pcie_do_recovery(struct pci_dev *dev,
else
bridge = pci_upstream_bridge(dev);
- bus = bridge->subordinate;
pci_dbg(dev, "broadcast error_detected message\n");
if (state == pci_channel_io_frozen) {
- pci_walk_bus(bus, report_frozen_detected, &status);
+ pci_walk_bridge(bridge, report_frozen_detected, &status);
status = reset_subordinate_device(bridge);
if (status != PCI_ERS_RESULT_RECOVERED) {
pci_warn(dev, "subordinate device reset failed\n");
goto failed;
}
} else {
- pci_walk_bus(bus, report_normal_detected, &status);
+ pci_walk_bridge(bridge, report_normal_detected, &status);
}
if (status == PCI_ERS_RESULT_CAN_RECOVER) {
status = PCI_ERS_RESULT_RECOVERED;
pci_dbg(dev, "broadcast mmio_enabled message\n");
- pci_walk_bus(bus, report_mmio_enabled, &status);
+ pci_walk_bridge(bridge, report_mmio_enabled, &status);
}
if (status == PCI_ERS_RESULT_NEED_RESET) {
@@ -194,14 +209,14 @@ pci_ers_result_t pcie_do_recovery(struct pci_dev *dev,
*/
status = PCI_ERS_RESULT_RECOVERED;
pci_dbg(dev, "broadcast slot_reset message\n");
- pci_walk_bus(bus, report_slot_reset, &status);
+ pci_walk_bridge(bridge, report_slot_reset, &status);
}
if (status != PCI_ERS_RESULT_RECOVERED)
goto failed;
pci_dbg(dev, "broadcast resume message\n");
- pci_walk_bus(bus, report_resume, &status);
+ pci_walk_bridge(bridge, report_resume, &status);
if (pcie_aer_is_native(bridge))
pcie_clear_device_status(bridge);
--
2.28.0
next prev parent reply other threads:[~2020-10-02 18:48 UTC|newest]
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 ` Sean V Kelley [this message]
2020-10-02 18:47 ` [PATCH v8 07/14] PCI/ERR: Limit AER resets " Sean V Kelley
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
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=20201002184735.1229220-7-seanvk.dev@oregontracks.org \
--to=seanvk.dev@oregontracks.org \
--cc=Jonathan.Cameron@huawei.com \
--cc=ashok.raj@intel.com \
--cc=bhelgaas@google.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=qiuxu.zhuo@intel.com \
--cc=rafael.j.wysocki@intel.com \
--cc=sathyanarayanan.kuppuswamy@intel.com \
--cc=sean.v.kelley@intel.com \
--cc=tony.luck@intel.com \
/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).