From: Rafael J. Wysocki Date: Mon, 18 May 2009 20:51:12 +0000 (+0200) Subject: PCI PM: Follow PCI_PM_CTRL_NO_SOFT_RESET during transitions from D3 X-Git-Tag: v2.6.31-rc1~62^2~47 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f62795f1e892ca9269849fa83de97621da7e02c0;p=pandora-kernel.git PCI PM: Follow PCI_PM_CTRL_NO_SOFT_RESET during transitions from D3 According to the PCI PM specification (PCI Bus Power Management Interface Specification, Rev. 1.2, Section 5.4.1) we are supposed to reinitialize devices that have PCI_PM_CTRL_NO_SOFT_RESET clear during all transitions from PCI_D3hot to PCI_D0, but we only do it if the device's current_state field is equal to PCI_UNKNOWN. This may lead to problems if a device with PCI_PM_CTRL_NO_SOFT_RESET unset is put into PCI_D3hot at run time by its driver and pci_set_power_state() is used to put it back into PCI_D0, because in that case the device will remain uninitialized after pci_set_power_state() has returned. Prevent that from happening by modifying pci_raw_set_power_state() to reinitialize devices with PCI_PM_CTRL_NO_SOFT_RESET unset during all transitions from D3 to D0. Cc: stable@kernel.org Signed-off-by: Rafael J. Wysocki Signed-off-by: Jesse Barnes --- Reading git-diff-tree failed