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Message-ID: <20241004220333.GA363904@bhelgaas>
Date: Fri, 4 Oct 2024 17:03:33 -0500
From: Bjorn Helgaas <helgaas@...nel.org>
To: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Cc: Lukas Wunner <lukas@...ner.de>,
Krzysztof Wilczyński <kw@...ux.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>,
linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] PCI: Cleanup convoluted logic in pci_create_slot()
On Fri, Oct 04, 2024 at 06:22:40PM +0300, Ilpo Järvinen wrote:
> pci_create_slot() has an if () which can be made simpler by splitting
> it into two parts. In order to not duplicate error handling, add a new
> label too to handle kobj put.
>
> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Applied to pci/misc for v6.13, thank you!
> ---
> drivers/pci/slot.c | 20 +++++++++++---------
> 1 file changed, 11 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/pci/slot.c b/drivers/pci/slot.c
> index 0f87cade10f7..9ac5a4f26794 100644
> --- a/drivers/pci/slot.c
> +++ b/drivers/pci/slot.c
> @@ -244,12 +244,13 @@ struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr,
> slot = get_slot(parent, slot_nr);
> if (slot) {
> if (hotplug) {
> - if ((err = slot->hotplug ? -EBUSY : 0)
> - || (err = rename_slot(slot, name))) {
> - kobject_put(&slot->kobj);
> - slot = NULL;
> - goto err;
> + if (slot->hotplug) {
> + err = -EBUSY;
> + goto put_slot;
> }
> + err = rename_slot(slot, name);
> + if (err)
> + goto put_slot;
> }
> goto out;
> }
> @@ -278,10 +279,8 @@ struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr,
>
> err = kobject_init_and_add(&slot->kobj, &pci_slot_ktype, NULL,
> "%s", slot_name);
> - if (err) {
> - kobject_put(&slot->kobj);
> - goto err;
> - }
> + if (err)
> + goto put_slot;
>
> down_read(&pci_bus_sem);
> list_for_each_entry(dev, &parent->devices, bus_list)
> @@ -296,6 +295,9 @@ struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr,
> kfree(slot_name);
> mutex_unlock(&pci_slot_mutex);
> return slot;
> +
> +put_slot:
> + kobject_put(&slot->kobj);
> err:
> slot = ERR_PTR(err);
> goto out;
> --
> 2.39.5
>
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