AuxXxilium/linux_dsm_epyc7002
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f496648b99
linux_dsm_epyc7002/drivers/pci/hotplug
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Alexandru Gagniuc f496648b99 PCI: pciehp: Wait for PDS if in-band presence is disabled 
When in-band presence detect is disabled, PDS may come up at any time or
not at all.  PDS being low may indicate that the card is still mating, and
we could expect contact bounce to bring down the link as well.

It is reasonable to assume that most cards will mate in a hotplug slot in
about a second.  Thus, when we know PDS only reflects out-of-band presence
detect, it's worthwhile to wait the extra second or so to make sure the
card is properly mated before loading the driver and to prevent the hotplug
code from disabling a device if the presence detect change goes active
after the device is enabled.

Link: https://lore.kernel.org/r/20191025190047.38130-3-stuart.w.hayes@gmail.com
[bhelgaas: use ctrl_info() instead of pci_info()]
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Signed-off-by: Stuart Hayes <stuart.w.hayes@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Lukas Wunner <lukas@wunner.de>
2020-02-20 22:47:29 -06:00
..
acpi_pcihp.c PCI: shpchp: Separate existence of SHPC and permission to use it 2018-06-26 15:38:28 -05:00
acpiphp_core.c Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax 2018-10-28 11:35:40 -07:00
acpiphp_glue.c ACPI / hotplug / PCI: Allocate resources directly under the non-hotplug bridge 2019-11-13 17:01:59 -06:00
acpiphp_ibm.c PCI: hotplug: Embed hotplug_slot 2018-09-18 17:52:15 -05:00
acpiphp.h Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax 2018-10-28 11:35:40 -07:00
cpci_hotplug_core.c PCI: Remove unnecessary returns 2019-08-30 14:00:34 -05:00
cpci_hotplug_pci.c PCI: hotplug: Embed hotplug_slot 2018-09-18 17:52:15 -05:00
cpci_hotplug.h PCI: hotplug: Embed hotplug_slot 2018-09-18 17:52:15 -05:00
cpcihp_generic.c PCI: Add SPDX GPL-2.0+ to replace GPL v2 or later boilerplate 2018-01-28 15:49:06 -06:00
cpcihp_zt5550.c PCI: Add SPDX GPL-2.0+ to replace GPL v2 or later boilerplate 2018-01-28 15:49:06 -06:00
cpcihp_zt5550.h PCI: Add SPDX GPL-2.0+ to replace GPL v2 or later boilerplate 2018-01-28 15:49:06 -06:00
cpqphp_core.c PCI: Remove unnecessary returns 2019-08-30 14:00:34 -05:00
cpqphp_ctrl.c PCI: Remove unnecessary returns 2019-08-30 14:00:34 -05:00
cpqphp_nvram.c PCI: Add SPDX GPL-2.0+ to replace GPL v2 or later boilerplate 2018-01-28 15:49:06 -06:00
cpqphp_nvram.h PCI: Remove unnecessary returns 2019-08-30 14:00:34 -05:00
cpqphp_pci.c Merge branch 'pci/spdx' into next 2018-02-01 11:40:07 -06:00
cpqphp_sysfs.c PCI: Add SPDX GPL-2.0+ to replace GPL v2 or later boilerplate 2018-01-28 15:49:06 -06:00
cpqphp.h PCI: hotplug: Embed hotplug_slot 2018-09-18 17:52:15 -05:00
ibmphp_core.c PCI: ibmphp: Turn semaphores into completions or mutexes 2019-01-29 17:15:36 -06:00
ibmphp_ebda.c PCI: hotplug: Embed hotplug_slot 2018-09-18 17:52:15 -05:00
ibmphp_hpc.c PCI: ibmphp: Turn semaphores into completions or mutexes 2019-01-29 17:15:36 -06:00
ibmphp_pci.c Merge branch 'pci/spdx' into next 2018-02-01 11:40:07 -06:00
ibmphp_res.c PCI: Mark expected switch fall-through 2019-08-08 15:13:34 -05:00
ibmphp.h PCI: ibmphp: Turn semaphores into completions or mutexes 2019-01-29 17:15:36 -06:00
Kconfig PCI: Fix indentation 2019-11-21 15:06:47 -06:00
Makefile PCI/hotplug: remove the sgi_hotplug driver 2019-08-16 11:33:56 -07:00
pci_hotplug_core.c PCI: hotplug: Drop hotplug_slot_info 2018-09-18 17:52:15 -05:00
pciehp_core.c PCI: pciehp: Prevent deadlock on disconnect 2019-11-12 17:17:42 -06:00
pciehp_ctrl.c PCI: pciehp: Prevent deadlock on disconnect 2019-11-12 17:17:42 -06:00
pciehp_hpc.c PCI: pciehp: Wait for PDS if in-band presence is disabled 2020-02-20 22:47:29 -06:00
pciehp_pci.c PCI: pciehp: Log messages with pci_dev, not pcie_device 2019-05-09 16:45:20 -05:00
pciehp.h PCI: pciehp: Disable in-band presence detect when possible 2020-02-20 22:44:30 -06:00
pnv_php.c pci/hotplug/pnv-php: Wrap warnings in macro 2020-01-23 21:31:17 +11:00
rpadlpar_core.c PCI: Remove unnecessary returns 2019-08-30 14:00:34 -05:00
rpadlpar_sysfs.c pci-v4.16-changes 2018-02-06 09:59:40 -08:00
rpadlpar.h PCI: Add SPDX GPL-2.0+ to replace GPL v2 or later boilerplate 2018-01-28 15:49:06 -06:00
rpaphp_core.c pci-v5.5-changes 2019-12-03 13:58:22 -08:00
rpaphp_pci.c PCI: hotplug: Drop hotplug_slot_info 2018-09-18 17:52:15 -05:00
rpaphp_slot.c PCI: rpaphp: Get/put device node reference during slot alloc/dealloc 2019-04-10 16:07:12 -05:00
rpaphp.h PCI: hotplug: Embed hotplug_slot 2018-09-18 17:52:15 -05:00
s390_pci_hpc.c PCI: hotplug: Embed hotplug_slot 2018-09-18 17:52:15 -05:00
shpchp_core.c PCI: hotplug: Embed hotplug_slot 2018-09-18 17:52:15 -05:00
shpchp_ctrl.c PCI: hotplug: Drop hotplug_slot_info 2018-09-18 17:52:15 -05:00
shpchp_hpc.c PCI: Add SPDX GPL-2.0+ to replace GPL v2 or later boilerplate 2018-01-28 15:49:06 -06:00
shpchp_pci.c Merge branch 'pci/spdx' into next 2018-02-01 11:40:07 -06:00
shpchp_sysfs.c PCI: Add SPDX GPL-2.0+ to replace GPL v2 or later boilerplate 2018-01-28 15:49:06 -06:00
shpchp.h PCI: hotplug: Embed hotplug_slot 2018-09-18 17:52:15 -05:00
TODO PCI: hotplug: Document TODOs 2018-09-18 17:52:15 -05:00