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Current SHPCHP driver doesn't take care of RsvdP/RsvdZ[*] bits in logical slot registers. This might cause unpredicable results. This patch fixes this bug. [*] RsvdP and RsvdZ are defined in SHPC spec as follows: RsvdP - Reserved and Preserved. Register bits of this type are reserved for future use as R/W bits. The value read is undefined. Writes are ignored. Software must follow These rules when accessing RsvdP bits: - Software must ignore RsvdP bits when testing values read from these registers. - Software must not depend on RsvdP bit's ability to retain information when written - Software must always write back the value read in the RsvdP bits when writing one of these registers. RsvdZ - Reserved and Zero. Register bits of this type are reserved for future use as R/WC bits. The value read is undefined. Writes are ignored. Software must follow these rules when accessing RsvdZ bits: - Software must ignore RsvdZ bits when testing values read from these registers. - Software must not depends on a RsvdZ bit's ability to retain information when written. - Software must always write 0 to RsvdZ bits when writing one of these register. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Cc: Kristen Accardi <kristen.c.accardi@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> |
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.. | ||
acpi_pcihp.c | ||
acpiphp_core.c | ||
acpiphp_dock.c | ||
acpiphp_glue.c | ||
acpiphp_ibm.c | ||
acpiphp.h | ||
cpci_hotplug_core.c | ||
cpci_hotplug_pci.c | ||
cpci_hotplug.h | ||
cpcihp_generic.c | ||
cpcihp_zt5550.c | ||
cpcihp_zt5550.h | ||
cpqphp_core.c | ||
cpqphp_ctrl.c | ||
cpqphp_nvram.c | ||
cpqphp_nvram.h | ||
cpqphp_pci.c | ||
cpqphp_sysfs.c | ||
cpqphp.h | ||
fakephp.c | ||
ibmphp_core.c | ||
ibmphp_ebda.c | ||
ibmphp_hpc.c | ||
ibmphp_pci.c | ||
ibmphp_res.c | ||
ibmphp.h | ||
Kconfig | ||
Makefile | ||
pci_hotplug_core.c | ||
pci_hotplug.h | ||
pciehp_core.c | ||
pciehp_ctrl.c | ||
pciehp_hpc.c | ||
pciehp_pci.c | ||
pciehp.h | ||
pcihp_skeleton.c | ||
rpadlpar_core.c | ||
rpadlpar_sysfs.c | ||
rpadlpar.h | ||
rpaphp_core.c | ||
rpaphp_pci.c | ||
rpaphp_slot.c | ||
rpaphp.h | ||
sgi_hotplug.c | ||
shpchp_core.c | ||
shpchp_ctrl.c | ||
shpchp_hpc.c | ||
shpchp_pci.c | ||
shpchp_sysfs.c | ||
shpchp.h |