[PATCH v4 2/3] PCI/sysfs: Use runtime PM guard macro for auto-cleanup

["Rafael J. Wysocki" <rafael@kernel.org>]

From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Use the newly introduced pm_runtime_active_try guard to simplify
the code and add the proper error handling for PM runtime resume
errors.

Based on an earlier patch from Takashi Iwai <tiwai@suse.de> [1].

Link: https://patch.msgid.link/20250919163147.4743-3-tiwai@suse.de [1]
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---

v3 -> v4:
   * Use ACQUIRE()/ACQUIRE_ERR() (Jonathan)
   * Adjust subject and changelog
   * Take patch ownership (it's all different now)
   * Pick up Bjorn's ACK from v3 (Bjorn, please let me know if that's not OK)

v2 -> v3: No changes

v1 -> v2:
   * Adjust the name of the class to handle the disabled runtime PM case
     transparently (like the original code).

---
 drivers/pci/pci-sysfs.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -1475,8 +1475,9 @@ static ssize_t reset_method_store(struct
 		return count;
 	}
 
-	pm_runtime_get_sync(dev);
-	struct device *pmdev __free(pm_runtime_put) = dev;
+	ACQUIRE(pm_runtime_active_try, pm)(dev);
+	if (ACQUIRE_ERR(pm_runtime_active_try, &pm))
+		return -ENXIO;
 
 	if (sysfs_streq(buf, "default")) {
 		pci_init_reset_methods(pdev);