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authorRafael J. Wysocki <rjw@sisk.pl>2010-02-17 17:40:07 -0500
committerJesse Barnes <jbarnes@virtuousgeek.org>2010-02-22 19:20:39 -0500
commitc39fae1416d59fd565606793f090cebe3720d50d (patch)
treef53b3dc3202706c328c2306f168058ec2e9ae859 /drivers/acpi/acpica/acevents.h
parentc7f486567c1d0acd2e4166c47069835b9f75e77b (diff)
PCI PM: Make it possible to force using INTx for PCIe PME signaling
Apparently, some machines may have problems with PCI run-time power management if MSIs are used for the native PCIe PME signaling. In particular, on the MSI Wind U-100 PCIe PME interrupts are not generated by a PCIe root port after a resume from suspend to RAM, if the system wake-up was triggered by a PME from the device attached to this port. [It doesn't help to free the interrupt on suspend and request it back on resume, even if that is done along with disabling the MSI and re-enabling it, respectively.] However, if INTx interrupts are used for this purpose on the same machine, everything works just fine. For this reason, add a kernel command line switch allowing one to request that MSIs be not used for the native PCIe PME signaling, introduce a DMI table allowing us to blacklist machines that need this switch to be set by default and put the MSI Wind U-100 into this table. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/acpi/acpica/acevents.h')
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