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ACPI: PCI: Use a mutex guard to simplify acpi_get_pci_dev()

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Use a mutex guard in acpi_get_pci_dev() for the physical_node_lock
locking and drop local variable pci_dev that becomes redundant after
that change.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://patch.msgid.link/3056272.e9J7NaK4W3@rafael.j.wysocki
This commit is contained in:
Rafael J. Wysocki 2026-07-16 16:04:43 +02:00
parent 8a742141f7
commit 5d42a19dac
1 changed files with 4 additions and 7 deletions
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11
drivers/acpi/pci_root.c
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@ -8,6 +8,7 @@
#define pr_fmt(fmt) "ACPI: " fmt
#include <linux/cleanup.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
@ -307,24 +308,20 @@ struct pci_dev *acpi_get_pci_dev(acpi_handle handle)
{
struct acpi_device *adev = acpi_fetch_acpi_dev(handle);
struct acpi_device_physical_node *pn;
struct pci_dev *pci_dev = NULL;
if (!adev)
return NULL;
mutex_lock(&adev->physical_node_lock);
guard(mutex)(&adev->physical_node_lock);
list_for_each_entry(pn, &adev->physical_node_list, node) {
if (dev_is_pci(pn->dev)) {
get_device(pn->dev);
pci_dev = to_pci_dev(pn->dev);
break;
return to_pci_dev(pn->dev);
}
}
mutex_unlock(&adev->physical_node_lock);
return pci_dev;
return NULL;
}
EXPORT_SYMBOL_GPL(acpi_get_pci_dev);