aboutsummaryrefslogtreecommitdiffstats
path: root/include/pcmcia
diff options
context:
space:
mode:
authorDominik Brodowski <linux@dominikbrodowski.net>2010-03-29 21:40:35 +0200
committerDominik Brodowski <linux@dominikbrodowski.net>2010-05-10 10:23:19 +0200
commitcf26e8dc419424786575990aa133e76f5fb38657 (patch)
treef6913c925d7d3c050cd9c01516d017fd0b5ed277 /include/pcmcia
parentpcmcia: clarify alloc_io_space, move it to resource handlers (diff)
downloadlinux-dev-cf26e8dc419424786575990aa133e76f5fb38657.tar.xz
linux-dev-cf26e8dc419424786575990aa133e76f5fb38657.zip
pcmcia: do not autoadd root PCI bus resources
On the PCI root bus on the x86 architecture, the risk of hitting some strange system devices is too high: If a driver isn't loaded, the resources are not claimed; even if a driver is loaded, it may not request all resources or even the wrong one. We can neither trust the rest of the kernel nor ACPI/PNP and CRS parsing to get it right. Therefore, explicitly spell out what safeguards we provide, and add a safeguard to only use resources which are set up exclusively for the secondary PCI bus (non-subtractive mode): the risk of hitting system devices is quite low, as they usually aren't connected to the secondary PCI bus. CC: Jesse Barnes <jbarnes@virtuousgeek.org> CC: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Diffstat (limited to 'include/pcmcia')
0 files changed, 0 insertions, 0 deletions