https://github.com/torvalds/linux
Revision dd7fd3a82ce55e5772d41b1faa2439f15318a902 authored by Rafael J. Wysocki on 05 August 2016, 00:38:44 UTC, committed by Linus Torvalds on 05 August 2016, 01:33:58 UTC
If a PCI bridge (or PCIe port) that is runtime-suspended gets an ACPI
hotplug notification, such as a bus check, it has to be resumed before
re-scanning the devices below it, or those devices will not be
accessible and will be treated as hot-removed.
Make that happen and let the bridge suspend again after the bus below it
has been re-scanned.
This is a replacement for commit 16468c783cb4 ("ACPI / hotplug / PCI:
Runtime resume bridge before rescan") that has been reverted, because it
introduced a system resume regression (due to missing bridge->pci_dev
checks that are necessary in case the notification is targeted at the
host bridge) and it is necessary for the code added by commit
006d44e49a25 ("PCI: Add runtime PM support for PCIe ports") to work as
expected.
Tested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Tip revision: dd7fd3a82ce55e5772d41b1faa2439f15318a902 authored by Rafael J. Wysocki on 05 August 2016, 00:38:44 UTC
ACPI / hotplug / PCI: Runtime resume bridges before bus rescans
ACPI / hotplug / PCI: Runtime resume bridges before bus rescans
Tip revision: dd7fd3a
| File | Mode | Size |
|---|---|---|
| Documentation | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .cocciconfig | -rw-r--r-- | 59 bytes |
| .get_maintainer.ignore | -rw-r--r-- | 31 bytes |
| .gitignore | -rw-r--r-- | 1.3 KB |
| .mailmap | -rw-r--r-- | 6.7 KB |
| COPYING | -rw-r--r-- | 18.3 KB |
| CREDITS | -rw-r--r-- | 95.5 KB |
| Kbuild | -rw-r--r-- | 2.8 KB |
| Kconfig | -rw-r--r-- | 252 bytes |
| MAINTAINERS | -rw-r--r-- | 361.7 KB |
| Makefile | -rw-r--r-- | 56.9 KB |
| README | -rw-r--r-- | 18.1 KB |
| REPORTING-BUGS | -rw-r--r-- | 7.3 KB |
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