PCI/PM: Print config space of devices before suspend

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When resuming from hibernation (S4, also known as "suspend to disk") on a
VM, we have seen invalid config space, e.g.,

  serial 0000:00:16.3: restoring config space at offset 0x14 (was 0x9104e000, writing 0xffffffff)

To help debug problems like this, log the config space being saved before
suspend, similar to the log in pci_restore_config_dword() when resuming.

Link: https://lore.kernel.org/r/20200113060724.19571-1-yu.c.chen@intel.com
[bhelgaas: commit log]
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Len Brown <lenb@kernel.org>

...

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Chen Yu 2020-01-13 14:07:24 +08:00 • committed by Bjorn Helgaas

parent e42617b825

commit 47b802d5d8

1 changed files with 4 additions and 1 deletions

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drivers/pci/pci.c

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