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authorBjorn Helgaas <bjorn.helgaas@hp.com>2008-01-22 07:21:03 -0500
committerMark M. Hoffman <mhoffman@lightlink.com>2008-01-22 07:21:38 -0500
commit87b4b6634ac112ddfe7b92aae50eb4bf7b128d1a (patch)
tree3e7e5e671a9f0e6c997d98188336405d356e5aa6 /ipc/shm.c
parentd384e35a25445bb60457b7dab8cffe178c6b7ecb (diff)
hwmon: (it87) request only Environment Controller ports
The IT8705F and related parts are Super I/O controllers that contain many separate devices. Some BIOSes describe IT8705F I/O port usage under a motherboard device (PNP0C02) with overlapping regions, e.g., 0x290-0x29f and 0x290-0x294. The it87 driver supports only the Environment Controller, which requires only two ISA ports, but it used to request an eight-port range. If that range exceeds a range reported by the BIOS, as 0x290-0x297 would, the request fails, and the it87 driver cannot claim the device. This patch makes the it87 driver request only the two ports used for the Environment Controller device. Systems where this problem has been reported: Gigabyte GA-K8N Ultra 9 Gigabyte M56S-S3 Gigabyte GA-965G-DS3 Kernel bug reports: http://bugzilla.kernel.org/show_bug.cgi?id=9514 http://lkml.org/lkml/2007/12/4/466 Related change: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=a7839e960675b549f06209d18283d5cee2ce9261 The patch above increases the number of PNP port resources we support. Prior to this patch, we ignored some port resources, which masked the it87 problem. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
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