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2debd92899
mirror_ubuntu-kernels/drivers/pci/hotplug
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Yinghai Lu 2debd92899 PCI: pciehp: Disable/enable link during slot power off/on 
On a system with a repeater on the system board to support gen2 hotplug,
we found that when an ExpressModule is removed from some slots,
/var/log/messages will be full of "card present/not present" warnings.

It turns out the root complex is continually trying to train the link to
the repeater because the repeater has not been reset.

This patch will disable the link at removal time to allow the repeater
to be reset properly.  This also prevents a potential AER message at
removal time.

Also, when testing hotplug on a system under development, we found if we
boot the system without an EM installed, and later hot-add an EM, it
does not work with Linux, but another OS is ok.  The root cause is that
BIOS left link disabled when slot was empty at boot time, and other OS
is modifying the link disable bit in link ctrl during power on/off.

So we should do the same thing to disable/enable link during power off/on.

-v2: check link DLLA bit instead of 100ms waiting.
     Separate link disable/enable functions to another patch.

Signed-off-by: Yinghai Lu <yinghai.lu@oracle.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-02-14 08:45:02 -08:00
..
acpi_pcihp.c module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
acpiphp_core.c module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
acpiphp_glue.c PCI: Can continually add funcs after adding func0 2012-02-14 08:44:47 -08:00
acpiphp_ibm.c module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
acpiphp.h headers: kobject.h redux 2011-01-10 08:51:44 -08:00
cpci_hotplug_core.c atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
cpci_hotplug_pci.c PCI: cpci_hotplug: stop managing hotplug_slot->name 2008-10-22 16:42:39 -07:00
cpci_hotplug.h PCI: cpci_hotplug: stop managing hotplug_slot->name 2008-10-22 16:42:39 -07:00
cpcihp_generic.c PCI: hotplug/cpcihp, fix pci device refcounting 2010-02-22 16:17:02 -08:00
cpcihp_zt5550.c module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
cpcihp_zt5550.h
cpqphp_core.c module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
cpqphp_ctrl.c PCI: Make current and maximum bus speeds part of the PCI core 2010-02-22 16:15:17 -08:00
cpqphp_nvram.c PCI Hotplug: cpqphp: fix comment style 2009-06-11 12:04:08 -07:00
cpqphp_nvram.h
cpqphp_pci.c PCI Hotplug: cpqphp: don't use pci_find_slot() 2009-06-11 12:04:16 -07:00
cpqphp_sysfs.c drivers: autoconvert trivial BKL users to private mutex 2010-10-05 15:01:04 +02:00
cpqphp.h PCI: Make current and maximum bus speeds part of the PCI core 2010-02-22 16:15:17 -08:00
fakephp.c PCI: use for_each_pci_dev() 2010-07-30 09:47:22 -07:00
ibmphp_core.c module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
ibmphp_ebda.c PCI: drivers/pci/hotplug/ibmphp_ebda.c: add missing iounmap 2012-02-14 08:44:47 -08:00
ibmphp_hpc.c PCI hotplug: ibmphp-hpc: semaphore cleanup 2010-10-15 13:09:48 -07:00
ibmphp_pci.c PCI: replace remaining __FUNCTION__ occurrences 2008-04-20 21:47:09 -07:00
ibmphp_res.c ibmphp: Rename add_range() to add_bus_range() to avoid conflict 2010-02-10 17:45:09 -08:00
ibmphp.h PCI: ibmphp: stop managing hotplug_slot->name 2008-10-22 16:42:41 -07:00
Kconfig PCI: drivers/pci/slot.c should depend on CONFIG_SYSFS 2009-06-18 13:57:24 -07:00
Makefile PCI hotplug: acpiphp should be linked after vendor drivers 2009-11-04 08:47:14 -08:00
pci_hotplug_core.c module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
pciehp_acpi.c pci: add module.h to files implicitly relying on its presence. 2011-10-31 19:31:23 -04:00
pciehp_core.c module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
pciehp_ctrl.c PCI: pciehp: Handle push button event asynchronously 2011-12-05 10:21:47 -08:00
pciehp_hpc.c PCI: pciehp: Disable/enable link during slot power off/on 2012-02-14 08:45:02 -08:00
pciehp_pci.c PCI hotplug: pciehp: Fixed return value sign for pciehp_unconfigure_device 2010-07-30 09:29:15 -07:00
pciehp.h module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
pcihp_skeleton.c module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
pcihp_slot.c pci: Fix files needing export.h for EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:31:22 -04:00
rpadlpar_core.c pci: add module.h to files implicitly relying on its presence. 2011-10-31 19:31:23 -04:00
rpadlpar_sysfs.c PCI: introduce pci_slot 2008-06-10 14:37:03 -07:00
rpadlpar.h
rpaphp_core.c module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
rpaphp_pci.c PCI hotplug: rpaphp: make debug var unique 2008-10-20 10:54:27 -07:00
rpaphp_slot.c headers: kobject.h redux 2011-01-10 08:51:44 -08:00
rpaphp.h module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
sgi_hotplug.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
shpchp_core.c module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
shpchp_ctrl.c shpchp: update workqueue usage 2010-10-18 08:33:02 +02:00
shpchp_hpc.c PCI hotplug: shpchp: don't blindly claim non-AMD 0x7450 device IDs 2011-11-14 09:43:14 -08:00
shpchp_pci.c PCI hotplug: shpchp: Removed check for hotplug of display devices 2010-07-30 09:29:16 -07:00
shpchp_sysfs.c treewide: Convert uses of struct resource to resource_size(ptr) 2011-06-10 14:55:36 +02:00
shpchp.h module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30