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b76fee1bc5
linux/arch/s390/pci
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Niklas Schnelle b76fee1bc5 s390/pci: ignore stale configuration request event 
A configuration request event may be stale, that is the event
may reference a zdev which was already configured.
This can happen when a hotplug happens during boot such that
the device is discovered and configured in the initial clp_list_pci(),
then after initialization we enable events and process
the original configuration request which additionally still contains
the old disabled function handle leading to a failure during device
enablement and subsequent I/O lockout.

Fix this by restoring the check that the device to be configured is in
standby which was removed in commit f606b3ef47 ("s390/pci: adapt events
for zbus").

This check does not need serialization as we only enable the events after
zPCI has fully initialized, which includes the initial clp_list_pci(),
rescan only does updates and events are serialized with respect to each
other.

Fixes: f606b3ef47 ("s390/pci: adapt events for zbus")
Cc: <stable@vger.kernel.org> # 5.8
Reported-by: Shalini Chellathurai Saroja <shalini@linux.ibm.com>
Tested-by: Shalini Chellathurai Saroja <shalini@linux.ibm.com>
Acked-by: Pierre Morel <pmorel@linux.ibm.com>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2020-08-17 13:17:05 +02:00
..
Makefile s390/pci: create zPCI bus 2020-04-28 13:49:46 +02:00
pci_bus.c s390/pci: create links between PFs and VFs 2020-05-20 10:22:51 +02:00
pci_bus.h s390/pci: Handling multifunctions 2020-04-28 13:49:47 +02:00
pci_clp.c s390/pci: Log new handle in clp_disable_fh() 2020-05-28 12:26:03 +02:00
pci_debug.c locking/atomic, s390/pci: Remove redundant casts 2019-06-03 12:32:57 +02:00
pci_dma.c dma-mapping updates for 5.4: 2019-09-19 13:27:23 -07:00
pci_event.c s390/pci: ignore stale configuration request event 2020-08-17 13:17:05 +02:00
pci_insn.c s390/pci: provide support for MIO instructions 2019-04-29 10:47:01 +02:00
pci_irq.c s390/pci: do not set affinity for floating irqs 2020-04-22 16:20:55 +02:00
pci_mmio.c s390/pci: clarify comment in s390_mmio_read/write 2020-07-27 10:33:24 +02:00
pci_sysfs.c s390/pci: create zPCI bus 2020-04-28 13:49:46 +02:00
pci.c s390/pci: ioremap() align with generic code 2020-05-20 10:22:52 +02:00