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0aeddbd0cb
linux/drivers/char
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Vaibhav Gupta 0aeddbd0cb via-agp: convert to generic power management 
Convert via-agp from legacy PCI power management to the generic power
management framework.

Previously, via-agp used legacy PCI power management, and agp_via_suspend()
and agp_via_resume() were responsible for both device-specific things and
generic PCI things:

  agp_via_suspend
    pci_save_state(pdev)                <-- generic PCI
    pci_set_power_state(pdev, pci_choose_state(pdev, state)) <-- generic PCI

  agp_via_resume
    pci_set_power_state(pdev, PCI_D0)   <-- generic PCI
    pci_restore_state(pdev)             <-- generic PCI
    via_configure_agp3()                <-- device-specific
    via_configure()                     <-- device-specific

With generic power management, the PCI bus PM methods do the generic PCI
things, and the driver needs only the device-specific part, i.e.,

  suspend_devices_and_enter
    dpm_suspend_start(PMSG_SUSPEND)
      pci_pm_suspend                    # PCI bus .suspend() method
        agp_via_suspend                 <-- not needed at all; removed
    suspend_enter
      dpm_suspend_noirq(PMSG_SUSPEND)
        pci_pm_suspend_noirq            # PCI bus .suspend_noirq() method
          pci_save_state                <-- generic PCI
          pci_prepare_to_sleep          <-- generic PCI
            pci_set_power_state
    ...
    dpm_resume_end(PMSG_RESUME)
      pci_pm_resume                     # PCI bus .resume() method
        pci_restore_standard_config
          pci_set_power_state(PCI_D0)   <-- generic PCI
          pci_restore_state             <-- generic PCI
        agp_via_resume                  # dev->driver->pm->resume
          via_configure_agp3()          <-- device-specific
          via_configure()               <-- device-specific

[bhelgaas: commit log]
Link: https://lore.kernel.org/r/20211208193305.147072-4-helgaas@kernel.org
Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Dave Airlie <airlied@redhat.com>
2021-12-14 11:26:19 -06:00
..
agp via-agp: convert to generic power management 2021-12-14 11:26:19 -06:00
hw_random vhost,virtio,vhost: fixes,features 2021-11-03 15:00:39 -07:00
ipmi ipmi: kcs_bmc: Fix a memory leak in the error handling path of 'kcs_bmc_serio_add_device()' 2021-10-29 07:23:59 -05:00
mwave char: mware: fix returnvar.cocci warnings 2021-08-27 16:20:37 +02:00
pcmcia cm4000_cs: Use struct_group() to zero struct cm4000_dev region 2021-09-25 08:20:49 -07:00
tpm tpm_tis_spi: Add missing SPI ID 2021-10-26 05:03:34 +03:00
xilinx_hwicap treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
xillybus char: xillybus: fix msg_ep UAF in xillyusb_probe() 2021-10-19 09:40:18 +02:00
adi.c
apm-emulation.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
applicom.c Merge 5.12-rc6 into char-misc-next 2021-04-05 08:43:50 +02:00
applicom.h
bsr.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
ds1620.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
dsp56k.c
dtlk.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
hangcheck-timer.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 405 2019-06-05 17:37:13 +02:00
hpet.c char: hpet: Remove unused variable 'm' 2021-05-21 10:09:30 +02:00
Kconfig char: move RANDOM_TRUST_CPU & RANDOM_TRUST_BOOTLOADER into the Character devices menu 2021-08-16 19:02:19 +02:00
lp.c char: lp: remove redundant space around (inside) parenthesized expressions 2021-03-24 08:26:32 +01:00
Makefile remove the raw driver 2021-06-04 15:35:03 +02:00
mem.c /dev/mem: nowait zero/null ops 2021-09-14 10:46:19 +02:00
misc.c char: misc: increase DYNAMIC_MINORS value 2020-11-03 09:52:04 +01:00
mspec.c char: mspec: Use kvzalloc() in mspec_mmap() 2020-08-28 12:10:04 +02:00
nsc_gpio.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
nvram.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
nwbutton.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
nwbutton.h misc: cleanup minor number definitions in c file into miscdevice.h 2020-03-18 12:27:03 +01:00
nwflash.c misc: move FLASH_MINOR into miscdevice.h and fix conflicts 2020-03-18 12:27:04 +01:00
pc8736x_gpio.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
powernv-op-panel.c powerpc/powernv: Fix fall-through warning for Clang 2021-07-13 19:21:41 -05:00
ppdev.c ppdev: Distribute switch variables for initialization 2020-02-23 20:28:12 +01:00
ps3flash.c powerpc/ps3: make system bus's remove and shutdown callbacks return void 2020-12-04 01:01:22 +11:00
random.c random: remove dead code left over from blocking pool 2021-04-02 18:28:12 +11:00
scx200_gpio.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
sonypi.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
tb0219.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
tlclk.c drivers: char: tlclk.c: Avoid data race between init and interrupt handler 2020-04-23 16:55:24 +02:00
toshiba.c module: remove never implemented MODULE_SUPPORTED_DEVICE 2021-03-17 13:16:18 -07:00
ttyprintk.c tty: drop put_tty_driver 2021-07-27 12:17:21 +02:00
uv_mmtimer.c
virtio_console.c virtio_console: validate max_nr_ports before trying to use it 2021-11-01 05:26:48 -04:00