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author | Feng Tang <feng.tang@intel.com> | 2012-08-16 15:50:10 +0800 |
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committer | Samuel Ortiz <sameo@linux.intel.com> | 2012-08-23 16:51:01 +0200 |
commit | a0e35322910555e20e9eced3f050a76c7b3a1f92 (patch) | |
tree | aac56e9a92c5fc1f660965939434ae95960df77e /drivers/mfd/cs5535-mfd.c | |
parent | 1922b0f2758badc0b971d1ebbd300bc6635a6aef (diff) | |
download | linux-a0e35322910555e20e9eced3f050a76c7b3a1f92.tar.bz2 |
mfd: lpc_ich: Fix a 3.5 kernel regression for iTCO_wdt driver
There are many reports (including 2 of my machines) that iTCO_wdt watchdog
driver fails to be initialized in 3.5 kernel with error message like:
[ 5.265175] ACPI Warning: 0x00001060-0x0000107f SystemIO conflicts with Region \_SB_.PCI0.LPCB.TCOI 1 (20120320/utaddress-251)
[ 5.265192] ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver
[ 5.265206] lpc_ich: Resource conflict(s) found affecting iTCO_wdt
The root cause the iTCO_wdt driver in 3.4 probes the HW IO resource from
LPC's PCI config space, while in 3.5 kernel it relies on lpc_ich driver
for the probe, which adds a new acpi_check_resource_conflict() check, and
give up the probe if there is any conflict with ACPI.
Fix it by removing all the checks for iTCO_wdt to keep the same behavior as
3.4 kernel.
https://bugzilla.kernel.org/show_bug.cgi?id=44991
Actually the same check could be removed for the gpio-ich in lpc_ich.c,
but I'm not sure if it will cause problems.
Signed-off-by: Feng Tang <feng.tang@intel.com>
Cc: Aaron Sierra <asierra@xes-inc.com>
Cc: Wim Van Sebroeck <wim@iguana.be>
Cc: Len Brown <len.brown@intel.com>
Cc: Bob Moore <robert.moore@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/mfd/cs5535-mfd.c')
0 files changed, 0 insertions, 0 deletions