* Re: [PATCH v5 0/2] ata: ahci_brcm: Fix use of BCM7216 reset controller
[not found] <CA+-6iNyN4UB3Sb14RJ9Jb2rXn_u-iwHzny1LYXEq3=VddWWxPg@mail.gmail.com>
@ 2021-04-28 20:53 ` Bjorn Helgaas
2021-04-28 21:03 ` Florian Fainelli
0 siblings, 1 reply; 5+ messages in thread
From: Bjorn Helgaas @ 2021-04-28 20:53 UTC (permalink / raw)
To: Jim Quinlan
Cc: Jim Quinlan, linux-pci, Nicolas Saenz Julienne,
bcm-kernel-feedback-list, Florian Fainelli, Hans de Goede,
Jens Axboe, Jim Quinlan, linux-arm-kernel, linux-ide,
linux-kernel, linux-rpi-kernel, Lorenzo Pieralisi, Rob Herring,
Amjad Ouled-Ameur, Philipp Zabel
[+cc Amjad, Philipp: possible issue with 557acb3d2cd9 ("reset: make
shared pulsed reset controls re-triggerable") below; report at
https://lore.kernel.org/linux-ide/20210428200058.GA366202@bjorn-Precision-5520/]
On Wed, Apr 28, 2021 at 04:34:00PM -0400, Jim Quinlan wrote:
> On Wed, Apr 28, 2021 at 4:01 PM Bjorn Helgaas <helgaas@kernel.org> wrote:
> > On Fri, Mar 12, 2021 at 03:45:53PM -0500, Jim Quinlan wrote:
> > > v5 -- Improved (I hope) commit description (Bjorn).
> > > -- Rnamed error labels (Krzyszt).
> > > -- Fixed typos.
> > >
> > > v4 -- does not rely on a pending commit, unlike v3.
> > >
> > > v3 -- discard commit from v2; instead rely on the new function
> > > reset_control_rearm provided in a recent commit [1] applied
> > > to reset/next.
> > > -- New commit to correct pcie-brcmstb.c usage of a reset controller
> > > to use reset/rearm verses deassert/assert.
> > >
> > > v2 -- refactor rescal-reset driver to implement assert/deassert rather than
> > > reset because the reset call only fires once per lifetime and we need
> > > to reset after every resume from S2 or S3.
> > > -- Split the use of "ahci" and "rescal" controllers in separate fields
> > > to keep things simple.
> > >
> > > v1 -- original
> > >
> > > Jim Quinlan (2):
> > > ata: ahci_brcm: Fix use of BCM7216 reset controller
> > > PCI: brcmstb: Use reset/rearm instead of deassert/assert
> > >
> > > drivers/ata/ahci_brcm.c | 46 +++++++++++++--------------
> > > drivers/pci/controller/pcie-brcmstb.c | 19 +++++++----
> > > 2 files changed, 36 insertions(+), 29 deletions(-)
> >
> > Tripped over these errors while build testing with the .config below.
> > This is on the pci/brcmstb branch from
> > git://git.kernel.org/pub/scm/linux/kernel/git/lpieralisi/pci.git
> >
> > Dropping the pci/brcmstb branch while we get this figured out. This will
> > remove the following commits:
> >
> > a24fd1d6469f ("PCI: brcmstb: Use reset/rearm instead of deassert/assert")
> > 92b9cb55a9b6 ("ata: ahci_brcm: Fix use of BCM7216 reset controller")
> > b5d9209d5083 ("PCI: brcmstb: Fix error return code in brcm_pcie_probe()")
>
> Hi Bjorn,
>
> I believe the problem is that the commit
>
> 557acb3d2cd9c82de19f944f6cc967a347735385
> "reset: make shared pulsed reset controls re-triggerable"
>
> defined reset_control_rearm() for the CONFIG_RESET_CONTROLLER=y case
> but forgot to define an empty function for the unset case. Your test
> .config has this CONFIG unset.
>
> Would you like me to resubmit this with an additional commit that
> fixes this?
The fix could be a patch along those lines, or it could be a Kconfig
change that makes this config impossible. I didn't look deeper to see
what makes sense. But I don't think the fix should be "manually avoid
this configuration."
It looks like 557acb3d2cd9 ("reset: make shared pulsed reset controls
re-triggerable") appeared in v5.11, so if a patch is the right thing,
it should probably be marked for stable ("v5.11+").
Bjorn
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH v5 0/2] ata: ahci_brcm: Fix use of BCM7216 reset controller
2021-04-28 20:53 ` [PATCH v5 0/2] ata: ahci_brcm: Fix use of BCM7216 reset controller Bjorn Helgaas
@ 2021-04-28 21:03 ` Florian Fainelli
0 siblings, 0 replies; 5+ messages in thread
From: Florian Fainelli @ 2021-04-28 21:03 UTC (permalink / raw)
To: Bjorn Helgaas, Jim Quinlan
Cc: Jim Quinlan, linux-pci, Nicolas Saenz Julienne,
bcm-kernel-feedback-list, Florian Fainelli, Hans de Goede,
Jens Axboe, Jim Quinlan, linux-arm-kernel, linux-ide,
linux-kernel, linux-rpi-kernel, Lorenzo Pieralisi, Rob Herring,
Amjad Ouled-Ameur, Philipp Zabel
On 4/28/2021 1:53 PM, Bjorn Helgaas wrote:
> [+cc Amjad, Philipp: possible issue with 557acb3d2cd9 ("reset: make
> shared pulsed reset controls re-triggerable") below; report at
> https://lore.kernel.org/linux-ide/20210428200058.GA366202@bjorn-Precision-5520/]
>
> On Wed, Apr 28, 2021 at 04:34:00PM -0400, Jim Quinlan wrote:
>> On Wed, Apr 28, 2021 at 4:01 PM Bjorn Helgaas <helgaas@kernel.org> wrote:
>>> On Fri, Mar 12, 2021 at 03:45:53PM -0500, Jim Quinlan wrote:
>>>> v5 -- Improved (I hope) commit description (Bjorn).
>>>> -- Rnamed error labels (Krzyszt).
>>>> -- Fixed typos.
>>>>
>>>> v4 -- does not rely on a pending commit, unlike v3.
>>>>
>>>> v3 -- discard commit from v2; instead rely on the new function
>>>> reset_control_rearm provided in a recent commit [1] applied
>>>> to reset/next.
>>>> -- New commit to correct pcie-brcmstb.c usage of a reset controller
>>>> to use reset/rearm verses deassert/assert.
>>>>
>>>> v2 -- refactor rescal-reset driver to implement assert/deassert rather than
>>>> reset because the reset call only fires once per lifetime and we need
>>>> to reset after every resume from S2 or S3.
>>>> -- Split the use of "ahci" and "rescal" controllers in separate fields
>>>> to keep things simple.
>>>>
>>>> v1 -- original
>>>>
>>>> Jim Quinlan (2):
>>>> ata: ahci_brcm: Fix use of BCM7216 reset controller
>>>> PCI: brcmstb: Use reset/rearm instead of deassert/assert
>>>>
>>>> drivers/ata/ahci_brcm.c | 46 +++++++++++++--------------
>>>> drivers/pci/controller/pcie-brcmstb.c | 19 +++++++----
>>>> 2 files changed, 36 insertions(+), 29 deletions(-)
>>>
>>> Tripped over these errors while build testing with the .config below.
>>> This is on the pci/brcmstb branch from
>>> git://git.kernel.org/pub/scm/linux/kernel/git/lpieralisi/pci.git
>>>
>>> Dropping the pci/brcmstb branch while we get this figured out. This will
>>> remove the following commits:
>>>
>>> a24fd1d6469f ("PCI: brcmstb: Use reset/rearm instead of deassert/assert")
>>> 92b9cb55a9b6 ("ata: ahci_brcm: Fix use of BCM7216 reset controller")
>>> b5d9209d5083 ("PCI: brcmstb: Fix error return code in brcm_pcie_probe()")
>>
>> Hi Bjorn,
>>
>> I believe the problem is that the commit
>>
>> 557acb3d2cd9c82de19f944f6cc967a347735385
>> "reset: make shared pulsed reset controls re-triggerable"
>>
>> defined reset_control_rearm() for the CONFIG_RESET_CONTROLLER=y case
>> but forgot to define an empty function for the unset case. Your test
>> .config has this CONFIG unset.
>>
>> Would you like me to resubmit this with an additional commit that
>> fixes this?
>
> The fix could be a patch along those lines, or it could be a Kconfig
> change that makes this config impossible. I didn't look deeper to see
> what makes sense. But I don't think the fix should be "manually avoid
> this configuration."
>
> It looks like 557acb3d2cd9 ("reset: make shared pulsed reset controls
> re-triggerable") appeared in v5.11, so if a patch is the right thing,
> it should probably be marked for stable ("v5.11+").
All of the other reset controller API have inline stubs when
CONFIG_RESET_CONTROLLER is disabled, not having one for
reset_control_rearm() seems like an oversight (easy to make since if you
introduce the API you obviously needed it and did not consider the case
where it may not be available).
I agree this would be stable material.
--
Florian
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH v5 0/2] ata: ahci_brcm: Fix use of BCM7216 reset controller
2021-04-06 15:42 ` Lorenzo Pieralisi
@ 2021-04-06 16:38 ` Florian Fainelli
0 siblings, 0 replies; 5+ messages in thread
From: Florian Fainelli @ 2021-04-06 16:38 UTC (permalink / raw)
To: Lorenzo Pieralisi, linux-pci, james.quinlan,
Nicolas Saenz Julienne, bcm-kernel-feedback-list, Jim Quinlan,
Bjorn Helgaas
Cc: Rob Herring,
moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE,
moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE,
Jim Quinlan, Hans de Goede, Jens Axboe,
open list:LIBATA SUBSYSTEM Serial and Parallel ATA drivers,
open list
On 4/6/2021 8:42 AM, Lorenzo Pieralisi wrote:
> On Fri, 12 Mar 2021 15:45:53 -0500, Jim Quinlan wrote:
>> v5 -- Improved (I hope) commit description (Bjorn).
>> -- Rnamed error labels (Krzyszt).
>> -- Fixed typos.
>>
>> v4 -- does not rely on a pending commit, unlike v3.
>>
>> v3 -- discard commit from v2; instead rely on the new function
>> reset_control_rearm provided in a recent commit [1] applied
>> to reset/next.
>> -- New commit to correct pcie-brcmstb.c usage of a reset controller
>> to use reset/rearm verses deassert/assert.
>>
>> [...]
>
> Applied to pci/brcmstb, thanks!
>
> [1/2] ata: ahci_brcm: Fix use of BCM7216 reset controller
> https://git.kernel.org/lpieralisi/pci/c/92b9cb55a9
> [2/2] PCI: brcmstb: Use reset/rearm instead of deassert/assert
> https://git.kernel.org/lpieralisi/pci/c/a24fd1d646
Thanks a lot!
--
Florian
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH v5 0/2] ata: ahci_brcm: Fix use of BCM7216 reset controller
2021-03-12 20:45 Jim Quinlan
@ 2021-04-06 15:42 ` Lorenzo Pieralisi
2021-04-06 16:38 ` Florian Fainelli
0 siblings, 1 reply; 5+ messages in thread
From: Lorenzo Pieralisi @ 2021-04-06 15:42 UTC (permalink / raw)
To: linux-pci, james.quinlan, Nicolas Saenz Julienne,
bcm-kernel-feedback-list, Jim Quinlan, Bjorn Helgaas
Cc: Lorenzo Pieralisi, Rob Herring,
moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE,
Florian Fainelli,
moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE,
Jim Quinlan, Hans de Goede, Jens Axboe,
open list:LIBATA SUBSYSTEM Serial and Parallel ATA drivers,
open list
On Fri, 12 Mar 2021 15:45:53 -0500, Jim Quinlan wrote:
> v5 -- Improved (I hope) commit description (Bjorn).
> -- Rnamed error labels (Krzyszt).
> -- Fixed typos.
>
> v4 -- does not rely on a pending commit, unlike v3.
>
> v3 -- discard commit from v2; instead rely on the new function
> reset_control_rearm provided in a recent commit [1] applied
> to reset/next.
> -- New commit to correct pcie-brcmstb.c usage of a reset controller
> to use reset/rearm verses deassert/assert.
>
> [...]
Applied to pci/brcmstb, thanks!
[1/2] ata: ahci_brcm: Fix use of BCM7216 reset controller
https://git.kernel.org/lpieralisi/pci/c/92b9cb55a9
[2/2] PCI: brcmstb: Use reset/rearm instead of deassert/assert
https://git.kernel.org/lpieralisi/pci/c/a24fd1d646
Thanks,
Lorenzo
^ permalink raw reply [flat|nested] 5+ messages in thread
* [PATCH v5 0/2] ata: ahci_brcm: Fix use of BCM7216 reset controller
@ 2021-03-12 20:45 Jim Quinlan
2021-04-06 15:42 ` Lorenzo Pieralisi
0 siblings, 1 reply; 5+ messages in thread
From: Jim Quinlan @ 2021-03-12 20:45 UTC (permalink / raw)
To: Bjorn Helgaas, linux-pci, Nicolas Saenz Julienne,
bcm-kernel-feedback-list, james.quinlan, jim2101024
Cc: Florian Fainelli, Hans de Goede, Jens Axboe, Jim Quinlan,
moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE,
open list:LIBATA SUBSYSTEM (Serial and Parallel ATA drivers),
open list,
moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE,
Lorenzo Pieralisi, Rob Herring
v5 -- Improved (I hope) commit description (Bjorn).
-- Rnamed error labels (Krzyszt).
-- Fixed typos.
v4 -- does not rely on a pending commit, unlike v3.
v3 -- discard commit from v2; instead rely on the new function
reset_control_rearm provided in a recent commit [1] applied
to reset/next.
-- New commit to correct pcie-brcmstb.c usage of a reset controller
to use reset/rearm verses deassert/assert.
v2 -- refactor rescal-reset driver to implement assert/deassert rather than
reset because the reset call only fires once per lifetime and we need
to reset after every resume from S2 or S3.
-- Split the use of "ahci" and "rescal" controllers in separate fields
to keep things simple.
v1 -- original
Jim Quinlan (2):
ata: ahci_brcm: Fix use of BCM7216 reset controller
PCI: brcmstb: Use reset/rearm instead of deassert/assert
drivers/ata/ahci_brcm.c | 46 +++++++++++++--------------
drivers/pci/controller/pcie-brcmstb.c | 19 +++++++----
2 files changed, 36 insertions(+), 29 deletions(-)
--
2.17.1
^ permalink raw reply [flat|nested] 5+ messages in thread
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2021-04-28 20:53 ` [PATCH v5 0/2] ata: ahci_brcm: Fix use of BCM7216 reset controller Bjorn Helgaas
2021-04-28 21:03 ` Florian Fainelli
2021-03-12 20:45 Jim Quinlan
2021-04-06 15:42 ` Lorenzo Pieralisi
2021-04-06 16:38 ` Florian Fainelli
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