Naga Chumbalkar 1a680b7c32 PCI: PCIe links may not get configured for ASPM under POWERSAVE mode ... v3 -> v2: Moved ASPM enabling logic to pci_set_power_state() v2 -> v1: Preserved the logic in pci_raw_set_power_state() : Added ASPM enabling logic after scanning Root Bridge : http://marc.info/?l=linux-pci&m=130046996216391&w=2 v1 : http://marc.info/?l=linux-pci&m=130013164703283&w=2 The assumption made in commit 41cd766b06 (PCI: Don't enable aspm before drivers have had a chance to veto it) that pci_enable_device() will result in re-configuring ASPM when aspm_policy is POWERSAVE is no longer valid. This is due to commit 97c145f7c8 (PCI: read current power state at enable time) which resets dev->current_state to D0. Due to this the call to pcie_aspm_pm_state_change() is never made. Note the equality check (below) that returns early: ./drivers/pci/pci.c: pci_raw_set_pci_power_state() 546 /* Check if we're already there */ 547 if (dev->current_state == state) 548 return 0; Therefore OSPM never configures the PCIe links for ASPM to turn them "on". Fix it by configuring ASPM from the pci_enable_device() code path. This also allows a driver such as the e1000e networking driver a chance to disable ASPM (L0s, L1), if need be, prior to enabling the device. A driver may perform this action if the device is known to mis-behave wrt ASPM. Signed-off-by: Naga Chumbalkar <nagananda.chumbalkar@hp.com> Acked-by: Rafael J. Wysocki <rjw@sisk.pl> Cc: Matthew Garrett <mjg59@srcf.ucam.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>		2011-03-21 09:40:43 -07:00
..
acpi	PM: Remove CONFIG_PM_OPS	2011-03-15 00:43:15 +01:00
asm-generic	asm-generic: support clock_adjtime() in <asm-generic/unistd.h>	2011-03-20 00:09:20 -04:00
crypto
drm	Merge remote branch 'intel/drm-intel-next' of ../drm-next into drm-core-next	2011-03-14 14:15:13 +10:00
keys	RxRPC: Fix v1 keys	2011-03-02 22:18:53 -08:00
linux	PCI: PCIe links may not get configured for ASPM under POWERSAVE mode	2011-03-21 09:40:43 -07:00
math-emu
media	[media] v4l: Include linux/videodev2.h in media/v4l2-ctrls.h	2011-01-19 11:52:09 -02:00
mtd
net	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6	2011-03-16 16:29:25 -07:00
pcmcia	pcmcia: re-enable Zoomed Video support	2011-02-20 12:47:34 +01:00
rdma	RDMA: Update workqueue usage	2011-01-16 21:16:31 -08:00
rxrpc
scsi	Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6	2011-03-17 17:54:40 -07:00
sound	Merge branch 'topic/misc' into for-linus	2011-03-18 07:39:08 +01:00
target	[SCSI] target: Fix t_transport_aborted handling in LUN_RESET + active I/O shutdown	2011-02-28 11:23:32 -06:00
trace	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6	2011-03-18 10:46:37 -07:00
video	fbdev: sh_mobile_lcdc: Add YUV framebuffer support	2011-03-16 17:27:10 +09:00
xen	Merge branch 'stable/xen.pm.bug-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen	2011-03-17 18:37:42 -07:00
Kbuild