On 7/14/20 9:52 AM, Vaibhav Gupta wrote: > On Tue, Jul 14, 2020 at 09:32:56AM +0200, Bartlomiej Zolnierkiewicz wrote: >> >> Hi, >> >> On 7/13/20 7:36 PM, Vaibhav Gupta wrote: >>> Linux Kernel Mentee: Remove Legacy Power Management. >>> >>> The purpose of this patch series is to remove legacy power management >>> callbacks >>> from ide drivers. >>> >>> The suspend() and resume() callbacks operations are still invoking >>> pci_save/restore_state(), pci_set_power_state(), pci_enable/disable_state(), >>> etc. and handling the power management themselves, which is not recommended. >>> >>> The conversion requires the removal of the those function calls and change >>> the >>> callback definition accordingly and make use of dev_pm_ops structure. >> >> IDE subsystem (drivers/ide/) is deprecated and has been superseded by libata >> subsystem (drivers/ata/). >> >> libata drivers have the same issue so please concentrate on fixing them >> first. Later (if desirable) changes can be back-ported to drivers/ide/. >> > Hello, (drivers/ide) and (drivers/ata) are the two major families, I am > working > on, for generic PM upgradation. I was bit unaware about priority, and also in > the last, both ide and ata drivers have to be upgraded.
Well, drivers/ide/ is scheduled for removal in 2021 (it even prints the warning during initialization of every host driver).. Best regards, -- Bartlomiej Zolnierkiewicz Samsung R&D Institute Poland Samsung Electronics >>> All patches are compile-tested only. >> >> This patchset needs (at least) some basic testing. It should be easier with >> libata subsystem as it also support SATA controllers and devices. > To upgrade PM in (drivers/ide) I have made .suspend() and .resume() static. > Then > bind them in "struct dev_pm_ops" variable (ide_pci_pm_ops) and expose it using > EXPORT_SYMBOL_GPL(). This has affected 30 drivers. I was hoping if ide changes > can be tested/verified, specially [PATCH 1/3]. As then, I will be sure about > similar change in ata, as it also requires similar alteration. > > Thanks > Vaibhav Gupta > >> >> Best regards, >> -- >> Bartlomiej Zolnierkiewicz >> Samsung R&D Institute Poland >> Samsung Electronics >> >>> v3: >>> - Modpost error for undefined reference by Kbuild in v1. >>> - Another approach to disable PM in drivers/ide/triflex.c suggested by >>> Bjorn Helgaas in v2. >>> >>> Test tools: >>> - Compiler: gcc (GCC) 10.1.0 >>> - allmodconfig build: make -j$(nproc) W=1 all >>> >>> Vaibhav Gupta (3): >>> ide: use generic power management >>> ide: sc1200: use generic power management >>> ide: delkin_cb: use generic power management >>> >>> drivers/ide/aec62xx.c | 3 +-- >>> drivers/ide/alim15x3.c | 3 +-- >>> drivers/ide/amd74xx.c | 3 +-- >>> drivers/ide/atiixp.c | 3 +-- >>> drivers/ide/cmd64x.c | 3 +-- >>> drivers/ide/cs5520.c | 3 +-- >>> drivers/ide/cs5530.c | 3 +-- >>> drivers/ide/cs5535.c | 3 +-- >>> drivers/ide/cs5536.c | 3 +-- >>> drivers/ide/cy82c693.c | 3 +-- >>> drivers/ide/delkin_cb.c | 32 +++++--------------------- >>> drivers/ide/hpt366.c | 3 +-- >>> drivers/ide/ide-pci-generic.c | 3 +-- >>> drivers/ide/it8172.c | 3 +-- >>> drivers/ide/it8213.c | 3 +-- >>> drivers/ide/it821x.c | 3 +-- >>> drivers/ide/jmicron.c | 3 +-- >>> drivers/ide/ns87415.c | 3 +-- >>> drivers/ide/opti621.c | 3 +-- >>> drivers/ide/pdc202xx_new.c | 3 +-- >>> drivers/ide/pdc202xx_old.c | 3 +-- >>> drivers/ide/piix.c | 3 +-- >>> drivers/ide/sc1200.c | 43 ++++++++++++----------------------- >>> drivers/ide/serverworks.c | 3 +-- >>> drivers/ide/setup-pci.c | 29 +++++------------------ >>> drivers/ide/siimage.c | 3 +-- >>> drivers/ide/sis5513.c | 3 +-- >>> drivers/ide/sl82c105.c | 3 +-- >>> drivers/ide/slc90e66.c | 3 +-- >>> drivers/ide/triflex.c | 24 +++++++------------ >>> drivers/ide/via82cxxx.c | 3 +-- >>> include/linux/ide.h | 8 +------ >>> 32 files changed, 62 insertions(+), 155 deletions(-) >>> >> > >
