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authorKenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>2008-12-17 12:08:15 +0900
committerJesse Barnes <jbarnes@virtuousgeek.org>2009-01-07 11:13:10 -0800
commite046cbd6c05ee859244245d7beeac395cd0057b3 (patch)
tree1d1c3f434a77b522af098c54114d4fee7bd96a6e /drivers/misc/ibmasm
parentc9ffa5a586a97da4d552f89b8f39eea79a63a612 (diff)
PCI: pciehp: add auto option to pciehp_detect_mode
ACPI based hot-pluggable PCIe slot detection logic was added to prevent the problem non hot-pluggable PCIe slot was detected as hot-pluggable. The slot detection logic can be selected through 'pciehp_detect_mode', but it would be better if it is selected automatically. This patch adds 'auto' option for 'pciehp_detect_mode'. When it is specified, pciehp judges which 'acpi' or 'pcie' should be used. It seems that the physical slot number is duplicated among some slots on most of the platforms with the above-mentioned problem. So 'auto' mode uses this information to judge which 'acpi' or 'pcie' should be used. That is, if duplicated physical slot numbers are detected, 'acpi' mode is used. This method is not perfect, but it's realistic. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/misc/ibmasm')
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