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Commit 614db269 authored by Sebastian Ott's avatar Sebastian Ott Committed by Martin Schwidefsky
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Revert "s390/pci: remove bit_lock usage in interrupt handler"



This reverts commit 9594ca6b.

With the handle_simple_irq irq_flow_handler it must be ensured to
not call generic_handle_irq with the same IRQ number on 2 CPUs at
the same time (interrupts are floating on s390).
Contrary to my initial investigation the irq_desc's lock usage in
handle_simple_irq does not ensure this. Thus re-introduce the bit-
lock usage in s390's pci handler.

Reported-by: default avatarUrsula Braun <ubraun@linux.ibm.com>
Reported-by: default avatarAlexander Schmidt <alexs@linux.ibm.com>
Signed-off-by: default avatarSebastian Ott <sebott@linux.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 8f9aca0c
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