From: Jim Quinlan <james.quinlan@broadcom.com>
To: Bjorn Helgaas <helgaas@kernel.org>
Cc: Jim Quinlan <jim2101024@gmail.com>,
"open list:PCI NATIVE HOST BRIDGE AND ENDPOINT DRIVERS"
<linux-pci@vger.kernel.org>, Bjorn Helgaas <bhelgaas@google.com>,
Nicolas Saenz Julienne <nsaenzjulienne@suse.de>,
"maintainer:BROADCOM BCM7XXX ARM ARCHITECTURE"
<bcm-kernel-feedback-list@broadcom.com>,
Nicolas Saenz Julienne <nsaenz@kernel.org>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Rob Herring <robh@kernel.org>,
Florian Fainelli <f.fainelli@gmail.com>,
"moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE"
<linux-rpi-kernel@lists.infradead.org>,
"moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE"
<linux-arm-kernel@lists.infradead.org>,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v1 4/4] PCI: brcmstb: add shutdown call to driver
Date: Tue, 25 May 2021 17:40:28 -0400 [thread overview]
Message-ID: <CA+-6iNzJw96710MVw-ZrJBE-CzxObrOTrjkd38j-1ELOZ0O4aw@mail.gmail.com> (raw)
In-Reply-To: <20210525211804.GA1228022@bjorn-Precision-5520>
[-- Attachment #1: Type: text/plain, Size: 2273 bytes --]
On Tue, May 25, 2021 at 5:18 PM Bjorn Helgaas <helgaas@kernel.org> wrote:
>
> Capitalize "Add" in the subject.
>
> On Tue, Apr 27, 2021 at 01:51:39PM -0400, Jim Quinlan wrote:
> > The shutdown() call is similar to the remove() call except the former does
> > not need to invoke pci_{stop,remove}_root_bus(), and besides, errors occur
> > if it does.
>
> This doesn't explain why shutdown() is necessary. "errors occur"
> might be a hint, except that AFAICT, many similar drivers do invoke
> pci_stop_root_bus() and pci_remove_root_bus() (several of them while
> holding pci_lock_rescan_remove()), without implementing .shutdown().
>
> It is ... unfortunate that there's such a variety of implementations
> here. I don't believe these driver differences are all necessary
> consequences of hardware differences.
Fair enough, I'll dig into the error.
Regards,
Jim Quinlan
Broadcom STB
>
> > Signed-off-by: Jim Quinlan <jim2101024@gmail.com>
> > ---
> > drivers/pci/controller/pcie-brcmstb.c | 10 ++++++++++
> > 1 file changed, 10 insertions(+)
> >
> > diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c
> > index d3af8d84f0d6..a1fe1a2ada48 100644
> > --- a/drivers/pci/controller/pcie-brcmstb.c
> > +++ b/drivers/pci/controller/pcie-brcmstb.c
> > @@ -1340,6 +1340,15 @@ static int brcm_pcie_remove(struct platform_device *pdev)
> > return 0;
> > }
> >
> > +static void brcm_pcie_shutdown(struct platform_device *pdev)
> > +{
> > + struct brcm_pcie *pcie = platform_get_drvdata(pdev);
> > +
> > + if (pcie->has_err_report)
> > + brcm_unregister_die_notifiers(pcie);
> > + __brcm_pcie_remove(pcie);
> > +}
> > +
> > static const struct of_device_id brcm_pcie_match[] = {
> > { .compatible = "brcm,bcm2711-pcie", .data = &bcm2711_cfg },
> > { .compatible = "brcm,bcm4908-pcie", .data = &bcm4908_cfg },
> > @@ -1460,6 +1469,7 @@ static const struct dev_pm_ops brcm_pcie_pm_ops = {
> > static struct platform_driver brcm_pcie_driver = {
> > .probe = brcm_pcie_probe,
> > .remove = brcm_pcie_remove,
> > + .shutdown = brcm_pcie_shutdown,
> > .driver = {
> > .name = "brcm-pcie",
> > .of_match_table = brcm_pcie_match,
> > --
> > 2.17.1
> >
[-- Attachment #2: S/MIME Cryptographic Signature --]
[-- Type: application/pkcs7-signature, Size: 4210 bytes --]
next prev parent reply other threads:[~2021-05-25 21:40 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-27 17:51 [PATCH v1 0/4] PCI: brcmstb: Add panic handler and shutdown func Jim Quinlan
2021-04-27 17:51 ` [PATCH v1 1/4] PCI: brcmstb: Check return value of clk_prepare_enable() Jim Quinlan
2021-04-27 17:51 ` [PATCH v1 2/4] PCI: brcmstb: Give 7216 SOCs their own config type Jim Quinlan
2021-04-27 17:51 ` [PATCH v1 3/4] PCI: brcmstb: Add panic/die handler to RC driver Jim Quinlan
2021-05-25 20:40 ` Bjorn Helgaas
2021-05-25 21:05 ` Jim Quinlan
2021-05-25 21:17 ` Bjorn Helgaas
2021-04-27 17:51 ` [PATCH v1 4/4] PCI: brcmstb: add shutdown call to driver Jim Quinlan
2021-04-27 19:35 ` Florian Fainelli
2021-05-25 21:18 ` Bjorn Helgaas
2021-05-25 21:40 ` Jim Quinlan [this message]
2021-05-26 16:11 ` Rob Herring
2021-05-26 17:03 ` Florian Fainelli
2021-06-03 17:23 ` Bjorn Helgaas
2021-06-03 17:30 ` Florian Fainelli
2021-06-03 20:58 ` Bjorn Helgaas
2021-06-03 21:01 ` Florian Fainelli
2021-05-25 18:01 ` [PATCH v1 0/4] PCI: brcmstb: Add panic handler and shutdown func Florian Fainelli
2021-06-03 16:32 ` Lorenzo Pieralisi
2021-06-03 17:31 ` Jim Quinlan
2021-06-04 9:22 ` Lorenzo Pieralisi
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=CA+-6iNzJw96710MVw-ZrJBE-CzxObrOTrjkd38j-1ELOZ0O4aw@mail.gmail.com \
--to=james.quinlan@broadcom.com \
--cc=bcm-kernel-feedback-list@broadcom.com \
--cc=bhelgaas@google.com \
--cc=f.fainelli@gmail.com \
--cc=helgaas@kernel.org \
--cc=jim2101024@gmail.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=linux-rpi-kernel@lists.infradead.org \
--cc=lorenzo.pieralisi@arm.com \
--cc=nsaenz@kernel.org \
--cc=nsaenzjulienne@suse.de \
--cc=robh@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).