s390/pci: Remove redundant bus removal and disable from zpci_release_device()

JIRA: https://issues.redhat.com/browse/RHEL-94944

commit d76f963
Author: Niklas Schnelle <schnelle@linux.ibm.com>
Date:   Thu May 22 14:13:12 2025 +0200

    s390/pci: Remove redundant bus removal and disable from zpci_release_device()

    Remove zpci_bus_remove_device() and zpci_disable_device() calls from
    zpci_release_device(). These calls were done when the device
    transitioned into the ZPCI_FN_STATE_STANDBY state which is guaranteed to
    happen before it enters the ZPCI_FN_STATE_RESERVED state. When
    zpci_release_device() is called the device is known to be in the
    ZPCI_FN_STATE_RESERVED state which is also checked by a WARN_ON().

    Cc: stable@vger.kernel.org
    Fixes: a46044a ("s390/pci: fix zpci_zdev_put() on reserve")
    Reviewed-by: Gerd Bayer <gbayer@linux.ibm.com>
    Reviewed-by: Julian Ruess <julianr@linux.ibm.com>
    Tested-by: Gerd Bayer <gbayer@linux.ibm.com>
    Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
    Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

Signed-off-by: Mete Durlu <mdurlu@redhat.com>

Author: Mete Durlu

arch/s390/pci/pci.c

@@ -943,12 +943,6 @@ void zpci_release_device(struct kref *kref)
 
 	WARN_ON(zdev->state != ZPCI_FN_STATE_RESERVED);
 
-	if (zdev->zbus->bus)
-		zpci_bus_remove_device(zdev, false);
-
-	if (zdev_enabled(zdev))
-		zpci_disable_device(zdev);
-
 	if (zdev->has_hp_slot)
 		zpci_exit_slot(zdev);