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| author |   Bjorn Helgaas <bhelgaas@google.com> | 2025-03-03 14:42:20 -0600 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2025-03-04 16:44:43 -0600 |
| commit | 800ce277f419a9b142a9ca0ec5a054225c5ff05b (patch) | |
| tree | fee455c56d759b03da9211f784d7d738570f2354 | |
| parent | Linux 6.14-rc1 (diff) | |
| download | wireguard-linux-800ce277f419a9b142a9ca0ec5a054225c5ff05b.tar.xz wireguard-linux-800ce277f419a9b142a9ca0ec5a054225c5ff05b.zip | |
PCI: Log debug messages about reset method
Log pci_dbg() messages about the reset methods we attempt and any errors
(-ENOTTY means "try the next method").
Set CONFIG_DYNAMIC_DEBUG=y and enable by booting with
dyndbg="file drivers/pci/* +p" or enable at runtime:
# echo "file drivers/pci/* +p" > /sys/kernel/debug/dynamic_debug/control
Link: https://lore.kernel.org/r/20250303204220.197172-1-helgaas@kernel.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
| -rw-r--r-- | drivers/pci/pci.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 869d204a70a3..3d13bb8e5c53 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -5230,6 +5230,7 @@ const struct pci_reset_fn_method pci_reset_fn_methods[] = { int __pci_reset_function_locked(struct pci_dev *dev) { int i, m, rc; + const struct pci_reset_fn_method *method; might_sleep(); @@ -5246,9 +5247,13 @@ int __pci_reset_function_locked(struct pci_dev *dev) if (!m) return -ENOTTY; - rc = pci_reset_fn_methods[m].reset_fn(dev, PCI_RESET_DO_RESET); + method = &pci_reset_fn_methods[m]; + pci_dbg(dev, "reset via %s\n", method->name); + rc = method->reset_fn(dev, PCI_RESET_DO_RESET); if (!rc) return 0; + + pci_dbg(dev, "%s failed with %d\n", method->name, rc); if (rc != -ENOTTY) return rc; } |